How to get hired as an HVAC technician in 2026-27

Your first hour: get EPA 608, then find out what your state licenses

Two facts decide whether the rest of your plan is valid, and both are cheap to establish. The first is that EPA Section 608 is federal and not optional: without it you cannot legally open a refrigerant circuit or buy refrigerant, so nobody can send you on a call alone. It has no prerequisites, so you can hold it before you have ever touched a condenser. Take the Universal exam rather than Type II alone, and take it this month. Plenty of shops will hire a helper who does not have it yet and tell you to get it; the point is that holding it already removes the one objection a service manager cannot work around, and it costs less than a pair of boots.

The second is that almost every other requirement in this trade is set within a few hundred miles of you. Whether a license exists at all, whether it is issued to you or to your employer, how many years of documented experience it needs, which edition of the mechanical and fuel gas codes your inspector enforces, whether the commercial work near you is union or open shop: all local. National advice applied to the wrong jurisdiction is how people lose two years.

So before you enroll in anything or pay anyone, spend an hour at the destinations below and write the answers down. Everything else in this article assumes you have them.

One more answer to get in that hour, because it changes which employers to approach: look at what is actually being built and maintained within driving distance. A metro with data centers, hospitals, universities and supermarkets has commercial and refrigeration work that pays and runs year round. A metro that is mostly new subdivisions has residential install work that is seasonal and rate sensitive. Both are HVAC. They are not the same career.

• EPA's own list of approved Section 608 certifying programs, then one organization's exam page for price, format and the nearest proctor. Book it.
• Your state licensing board. Search your state plus "HVAC license" and plus "mechanical contractor license", and settle three things: does the license apply to the individual or only the business, how many years of documented experience does the exam require, and which code edition is the exam written to.
• Your city or county building department, which matters most if your state has no HVAC license. Ask what a technician and a contractor need in order to pull a mechanical permit locally, and whether there is a separate gas fitting, boiler or refrigeration operator requirement.
• apprenticeship.gov, the US Department of Labor apprenticeship finder. Enter your zip code and search HVAC, HVACR and sheet metal. Registered is the word that matters, because a registered program documents your field hours and your classroom hours with a government body.
• Your local UA (United Association) and SMART (sheet metal) locals, plus the local MCAA/MSCA, PHCC, ACCA or ABC chapter. The UA side runs HVACR service apprenticeships; SMART runs sheet metal, ductwork and test and balance; the merit-shop chapters run registered programs too.
• BLS OES code 49-9021 for your metro area, for the percentile spread rather than a national average.
• Your utility's trade ally or qualified contractor program page. That list is a hiring driver, and getting onto it usually requires specific training, which tells you exactly which certifications local employers value.

What the job actually is, and the five lanes it splits into

An HVAC technician installs, maintains and diagnoses equipment that moves heat and air, working under a mechanical code and under the manufacturer's installation instructions, which are themselves enforceable on listed equipment. The work is refrigeration, electrical, combustion, airflow and controls at once, which is why it takes longer to get good at than people expect and why genuinely diagnostic technicians are scarce in every market.

The daily reality is physical and unglamorous in ways worth knowing before you commit: attics in August, crawl spaces, roofs, ladders, brazing overhead, repeated lifting that postings commonly specify at around fifty pounds, and in residential service a van you take home and an on-call rotation. The compensating facts are that the work cannot be offshored, the equipment keeps breaking, and nobody can talk their way into it.

The trade splits into five lanes that hire differently, pay differently and build different resumes. Pick one on purpose by your second or third year, because moving later costs real money in relearned habits and lost rate.

A sixth distinction cuts across all of them: install versus service. Install crews are the entry door in almost every market, they are production work, they are more seasonal, and they pay less. Service is diagnosis, customer contact and higher pay. The single most useful early decision is to stop being an installer who only installs, which in practice means volunteering for maintenance calls, owning a meter and a micron gauge, and asking to ride with the technician everyone else finds difficult.

• Residential service and replacement. Split systems, heat pumps, mini-splits, gas and electric furnaces, ductwork, indoor air quality add-ons. Fastest to enter, often hired within a week, pay increasingly tied to commission and flat-rate pricing, seasonal peaks, on-call. This is where most people start and where most stay.
• Light commercial. Rooftop packaged units, split systems in retail and offices, exhaust and makeup air, small chillers and boilers, basic controls. The step up from residential that keeps you out of attics and introduces equipment schedules, sequences of operation and property managers.
• Commercial and institutional, which is where the depth is. Central plants, water-cooled and air-cooled chillers, cooling towers, boilers and hydronics, VAV and VRF systems, air handlers, building automation. Employers are mechanical contractors, hospitals, universities, school districts, airports, and state and federal facilities. Slower hiring, published pay scales, pensions in the public ones, year-round work.
• Commercial refrigeration. Supermarkets, cold storage, restaurants, food processing. Rack systems, parallel compressors, case controllers, defrost strategies, and increasingly CO2 transcritical (R-744) systems, which are growing because of the HFC phasedown and are a genuine scarcity skill. Pays well, includes night and holiday work, and the phone rings when product is at risk.
• Industrial refrigeration and process cooling. Ammonia (R-717) plants, chemical and pharmaceutical process cooling, RETA CARO and CIRO credentials, IIAR standards, and OSHA process safety management under 29 CFR 1910.119 once a facility is over the ammonia threshold. The best paid lane for a technician who never becomes a contractor, and the one with the most serious safety regime.

Six routes in, and the four gates that quietly rule people out

There is no required path, which is both the opportunity and the trap. You can be working next week, or you can spend twenty thousand dollars first and be no further ahead. The routes differ mostly in how good the training is and how much of year one you spend carrying equipment.

Two of them register your hours and your classroom time with a government body, and that registration is what makes your experience count later without an argument when you sit a license exam or move states. The others work perfectly well, but you keep your own records from day one, and almost nobody does until it is too late.

Now the gates, because four things end the conversation and two of them are rarely mentioned. A driving record a company cannot insure, or no license at all, rules you out of most service jobs outright, because you take a van home and the insurer has a veto the service manager cannot override. Physical capacity to lift, climb, kneel and work in heat is a real requirement, not a formality. A background check and a drug screen are standard at the larger residential companies and at any job requiring a site badge, including hospitals, schools, airports and data centers. And arithmetic with fractions, decimals and a chart matters more than any interview answer, because you will be reading target superheat tables and blower charts on your knees with a flashlight.

A word on cost, because this is where people are most often misled. The order of spending that makes sense is: EPA 608 Universal first, then boots and a basic hand tool set, then a job, then instruments as you earn, then a license or NATE once you have the experience to make them mean something. Paying for school is a legitimate choice if you learn better in a classroom and want the theory. Paying for school in the belief that it substitutes for a license, or produces technician pay on day one, is not.

• Hired as an install helper or apprentice with a 608 card and nothing else. The most common route in the country. Show up with the card, boots, a clean driving record and the ability to be on time, and in most metros someone will hire you. Quality varies wildly: ask in the interview who you will ride with and whether the company pays for training.
• Registered apprenticeship through a UA local (HVACR service) or SMART local (sheet metal, ductwork, test and balance). Four to five years, paid from day one at a rising percentage of journeyman scale, classroom one or two nights a week, ending in real credentials, benefits and a defined-benefit pension in most locals. Applications open in windows, with an aptitude test and a scored interview. Best-structured route, hardest to get into.
• Registered merit-shop apprenticeship through an ABC, PHCC or ACCA chapter, a single-contractor program, or an NCCER-based employer program. Same structure, no hall, and quality tracks the sponsoring contractor. Ask to see the registered program standards and the wage progression before you sign.
• Community college or technical school HVACR program, six to twenty-four months. Teaches refrigeration theory, electrical, the code books, brazing and combustion in a way job sites rarely do, and makes you much easier to hire and much better in interviews. Confirm two things before enrolling: does the program include the 608 exam, and does your state count any of its hours toward license experience.
• Military. Air Force 3E1X1 heating, ventilation, air conditioning and refrigeration; Navy machinist's mate and utilitiesman ratings; Army 91C utilities equipment repairer. The skills and the discipline transfer directly, and Helmets to Hardhats connects to UA and SMART apprenticeships. Ask any civilian board in writing whether your service time counts as documented experience.
• Adjacent trade crossover. Appliance repair, auto air conditioning, electrical, plumbing, building maintenance and facilities. Diagnostic habits and customer skills transfer; the refrigerant circuit and the gas side do not, so expect to be paid as a strong apprentice rather than a technician until you prove both.

Credentials: what is federal law, what is a license, and what is marketing

This is the part the trade is worst at explaining, and the confusion costs people money. Three different kinds of paper exist and they do different things.

Federal certification, meaning EPA Section 608, is law. It says you may handle refrigerant. It says nothing about competence, and everyone has it. Section 609 is the separate equivalent for motor vehicle air conditioning. EPA's 2024 refrigerant management rule under the AIM Act extends the leak repair, recordkeeping, recovery and reclamation regime that used to center on ozone-depleting refrigerants to HFCs as well, with compliance dates landing in 2026 and 2027. Leak repair duties bite above a charge size, which puts commercial and industrial systems squarely in scope and leaves a residential split system out, but the prohibition on venting and the duty to recover apply to everything you will touch, and penalties can attach to the technician as well as the company. Treat recovery and recordkeeping as legal exposure, not paperwork.

A state or local license is permission to do the work or to contract for it, and as the key facts set out, it may be issued to you, to your employer, or not exist. Where it exists for individuals it is usually a journeyman and master structure gated on documented years. Where it exists only for businesses, your path to independence runs through qualifying that license later, which means experience plus an exam plus a bond and insurance. Specialized licenses sit alongside the main one in particular states and cities and surprise people: separate gas fitting licenses, boiler and stationary engineer licenses, refrigeration operating engineer licenses in cities such as New York and Chicago, and electrical licensing covering the wiring side of HVAC work in states such as Washington.

Industry certification is voluntary, and it is useful exactly to the degree that someone with money uses it as a filter. NATE is the most widely recognized, and it moves the needle for three concrete reasons: utility and manufacturer qualified-contractor programs often require it, some warranty and rebate paperwork references it, and it is independently verifiable, which makes it one of the few resume claims a hiring manager can confirm in thirty seconds. HVAC Excellence, RSES, NCCER and the manufacturer programs work the same way. None of them is a license. Do not let a school imply otherwise.

The certifications that measurably change what you get paid are the narrow ones, and they are worth planning toward once you can diagnose reliably. Manufacturer VRF and inverter certifications, which some brands require before a distributor will sell or warrant equipment. Controls platform certifications, Tridium Niagara 4 being the most portable. NEBB or TABB for test, adjust and balance. RETA CARO and CIRO for ammonia. CO2 transcritical training for supermarket refrigeration. BPI or HERS-side credentials if you move toward building performance and duct testing. Each makes you one of a handful of people in your city who can do a specific job.

• Get first, before applying: EPA 608 Universal.
• Get early, in your first year or two: OSHA 10, first aid and CPR, fall protection, aerial lift and forklift where relevant, brazing practice, and your state's apprentice or technician registration if it has one.
• Get once you have experience: NATE core plus the specialties matching your lane, your state journeyman or tradesman license if individuals are licensed, and the manufacturer certifications your employer's equipment lines require.
• Get when you choose a lane: Niagara 4 or another controls platform, NEBB or TABB, RETA CARO then CIRO, CO2 transcritical, medical gas where it applies, and the chiller factory schools for your market's dominant brand.
• Keep one folder, physical or digital, with every card, its number, its issuer and its expiry, and renew ninety days early. An expired card is the most common reason a technician cannot be badged onto a site on Monday.

A2L refrigerants, heat pumps and inverters: what actually changed under your hands

This is the live issue in 2026 and 2027, it is what interviewers probe, and it is where honest specificity separates you from candidates who have read a headline.

Under the AIM Act and EPA's Technology Transitions rule, new residential and light commercial air conditioning and heat pump equipment must use a refrigerant below 700 GWP, effective for equipment manufactured from January 1, 2025, with a narrow allowance to install earlier-manufactured components that ran into 2026 and has now closed. R-410A, at roughly 2,088 GWP, does not qualify. What replaced it is R-454B and R-32, at roughly 466 and 675. The consequence for you is not the number, it is the safety classification: R-410A is A1 under ASHRAE Standard 34, while R-454B and R-32 are A2L, meaning lower flammability. Mildly flammable is still flammable.

What that changes in practice, concretely. Your recovery machine, vacuum pump, leak detector and gauge set must be rated for A2L, and a shop that has not bought them yet is telling you something about itself. Cylinders ship as a flammable gas and carry flammable markings, and the valve outlet is not necessarily the fitting your old hoses use, so check the connection rather than forcing it, and think about how a cylinder rides in a van and is stored. Refrigerants are never mixed and never topped up across types. New equipment is built to the third edition of UL 60335-2-40, which brings charge limits based on room area and, above a threshold, an integrated refrigerant detection system that commands the indoor blower on, so a dead sensor or a bypassed board is a safety issue rather than a comfort one. The 2024 editions of the International Mechanical, Residential and Fire Codes and ASHRAE 15 were updated to accommodate A2Ls, and your jurisdiction may or may not have adopted them yet. And on a listed appliance the manufacturer's installation instructions govern, which in A2L work means reading them instead of assuming the old procedure carries over.

Say the narrow true thing in an interview and you will stand out: R-410A is not banned, servicing existing R-410A systems is legal and will be routine work well into the 2030s, and the real constraints are supply, price, and the fact that you cannot buy a new R-410A condenser to match an old coil. Candidates who say "R-410A is illegal now" mark themselves as having learned the trade from social media.

Heat pumps are the other half of the story, and the hype needs trimming in both directions. The technology is better than its reputation: AHRI ratings publish capacity at 47F and 17F, cold-climate product lists such as NEEP's ccASHP specification publish capacity at 5F, and the better variable-capacity units hold a useful fraction of their rated capacity far below where the old rule of thumb said to hand over to resistance heat. Efficiency is expressed in SEER2, EER2 and HSPF2 under the DOE test procedure in force since 2023, so a technician quoting plain SEER is quoting the pre-2023 metric. What changed on the demand side is incentives: the federal residential credits under sections 25C and 25D ended under the tax law enacted in July 2025, 25C for property placed in service after December 31, 2025 and 25D for expenditures after that date, which removed a tailwind from residential retrofit work. State-administered rebate programs and utility incentives continue on their own timelines and vary enormously, so check your state energy office and your utility rather than assuming either boom or bust.

The third change is the one technicians themselves name first, and it is not a policy at all. Nearly all new equipment is inverter-driven and communicating. That shifts diagnosis from a meter and a pressure reading toward fault codes, manufacturer service apps, line-set length and charge calculations, and knowing when the board is lying to you. It also means a technician who can only replace parts is slowly becoming unemployable, while one who can verify airflow, static pressure, charge and combustion with instruments is wanted everywhere.

If you want to know how much of this matters where you live, measure it instead of guessing: pull twenty postings from HVAC employers within fifty miles and count how many name A2L, R-454B, inverter or variable-capacity equipment, VRF, heat pumps specifically, or a controls platform. That count is your market's actual answer, and it takes fifteen minutes.

• Say which refrigerants you have personally worked with, including A2Ls, and whether your tools are A2L rated.
• Know the difference between charging to subcooling on a TXV system, to target superheat on a fixed-orifice system, and weighing in a charge adjusted for line-set length on a mini-split. This is the most common technical interview question in residential HVAC.
• Know proper evacuation: isolate with core removal tools, pull to a micron gauge rather than a clock, hit the level the manufacturer specifies (commonly 500 microns or lower), then valve off and run a decay test. Nitrogen purge while brazing, nitrogen for pressure testing, never oxygen.
• Know the gas side as well as the refrigerant side. Combustion analyzer readings in parts per million air free, draft and manifold pressure in inches of water column, temperature rise against the rating plate, and what you do when you find a cracked heat exchanger. Technicians who are strong on refrigerant and weak on combustion are common, and employers treat it as a safety exposure.
• Know airflow, because most comfort complaints are duct problems. Total external static pressure read against the blower table, static across filter and coil, temperature rise or plenum pressure to estimate airflow, and ACCA Manual J for load with Manual S for selection, which the residential code points at for sizing.

Pay, and how to read a pay plan before you sign

Pay in this trade spreads wider than in almost any office occupation, and it spreads along axes a national average hides completely: lane, geography, whether the market is organized, install versus service, and above all the structure of the pay plan. A residential service technician on a strong commission plan in a busy metro and an install helper two counties away are both HVAC technicians. So this article will not quote you a figure. It will tell you how to produce a better one.

Start with BLS Occupational Employment and Wage Statistics for SOC 49-9021, Heating, Air Conditioning, and Refrigeration Mechanics and Installers. Ignore the national line. Open the metropolitan-area table, find your metro, and read the full percentile row from the 10th to the 90th. The spread is the useful part, because it shows the bottom and the top of your own market, and the release date tells you how current it is.

If your market is organized, get the wage sheet from the UA or SMART local. Union scale is not secret: the sheet lists journeyman and foreman rates, the apprentice percentage for each period, and every benefit contribution line by line, which makes the total package legible in a way no job posting is. Compare packages rather than hourly rates, because health, pension and annuity contributions are frequently a large share of the total and are the part people forget to count.

For public work, sam.gov carries Davis-Bacon determinations by county and classification, and your state publishes prevailing-wage determinations for state-funded projects. On covered work those rates are enforceable rather than advisory, which makes them a floor you can name out loud. In pay-transparency states, read posted ranges, which show employer behavior rather than survey averages.

Then the part specific to residential service, which matters more than all of the above and is where people get hurt. Much of the industry pays some mix of hourly plus commission on sold work, flat-rate percentage, spiffs on specific products, and bonuses on maintenance agreement conversions. A posting advertising a large annual number is usually quoting a ceiling that few technicians reach. Never accept a verbal explanation of a pay plan. Ask for it in writing, and ask the questions below specifically.

One structural fact about the 2026 residential market worth knowing before you pick an employer: a large share of residential HVAC companies have been bought by private-equity-backed platforms over the last several years, and consolidation continues. That is not automatically bad. The better ones pay more, train properly, run real equipment and have a career ladder. The worse ones run hard sales scripts, measure technicians on average ticket and closing rate, and push replacement quotes on repairable systems, which puts your judgment under pressure. Ask who owns the company, ask what technicians are measured on, and ask the question that reveals the culture faster than any other: what happens when a technician recommends a repair instead of a replacement.

• What is the base, hourly or salary? Is drive time paid? Is on-call paid as a stipend, as hours, or not at all?
• What exactly earns commission, at what percentage, and is it on revenue, on gross margin, or on a flat-rate book price?
• What happens to my pay if a job I sold gets a callback, a warranty claim or a refund?
• What is the overtime rule, who gets the overtime, and how is the on-call rotation set?
• Van, fuel, phone, uniforms, tool allowance, specialty tools: who pays?
• Who pays for training and certification, does it happen on the clock, and is there a repayment clause if I leave?
• Is there a non-compete or a training repayment agreement, and may I read it before I accept?
• What is the slow-season plan? Are installers laid off or moved to maintenance? Ask current employees, not the recruiter.

How hiring actually runs, where the jobs are, and what the interview tests

HVAC hiring is not an office hiring loop, and advice written for one will mislead you. There are three distinct processes depending on who is hiring, and you should know which one you are in.

Residential service and replacement companies hire fast. You apply through a job board or the company site, or you walk in, and a recruiter or the service manager calls within a few days. There is usually one conversation with the service manager and sometimes a second with the general manager or owner, a hands-on test, a motor vehicle record check, a background check and a drug screen, and a start date within one to three weeks. Seasonality is real: the heaviest hiring runs late winter into spring ahead of cooling season and again in late summer ahead of heating season, which is the best time to apply and the worst time to be laid off from.

Commercial mechanical contractors, refrigeration companies and industrial employers move more deliberately. Hiring is driven by a service manager or lead technician, often through a referral from someone you have worked with, and the technical interview is substantive: specific equipment, specific controls, specific failure modes. In organized markets, commercial and industrial work often comes through a union local's referral rather than a posting at all, which means your resume confirms you after a phone call has already pointed at you.

Institutional employers, meaning hospitals, universities, school districts, airports, utilities, and state and federal facilities, hire through a formal posting and an application portal, score your licenses and certifications against published criteria, interview with a panel, and move slowly. Compensation is on a published scale, the benefits and pensions are usually better than private service work, the shifts are predictable and the work is year round. People overlook these jobs because the postings are dull. They are the best stability in the trade.

Where to actually look, because "apply online" is not advice. Work the list below in parallel and apply to ten employers rather than one; in this trade the limiting factor is almost never the number of openings, it is whether anyone has heard of you.

What the technical interview tests, across all three processes, is whether you diagnose or guess. The questions are predictable and you should rehearse them out loud, with numbers.

What the practical test looks like, because most residential employers run one: a trainer unit with a fault to find, a wiring diagram to read aloud, components to identify out of a bin, ohming a compressor and a motor, wiring a contactor and a low-voltage circuit, brazing a joint, bending and connecting a line set, or a ride-along where a technician watches you work a real call. On a ride-along they are watching behavior as much as skill: whether you put down drop cloths, whether your truck is organized, whether you explain the price before you start, whether you touch anything before you have the homeowner's agreement.

And what the non-technical questions are really asking. "How do you feel about on-call?" is asking whether you will quit in July. "Tell me about a difficult customer" is asking whether you argue with homeowners. "How comfortable are you with sales?" is asking whether you can present options without lying, and it is a fair question, because a technician who cannot explain a repair costs the company money and a technician who oversells costs it a reputation. Answer honestly: say you present the repair, the replacement and the cost of each, and let the customer choose.

• Career pages of the ten largest residential service companies in your metro, plus the big job boards, which genuinely dominate residential HVAC hiring.
• A walk-in at 7am with a one-page resume and your 608 card. This still works in this trade and in very few others.
• The wholesale counter. Ferguson, Johnstone Supply, the Watsco brands (Gemaire, Carrier Enterprise), and your local independent supply house: counter staff know exactly which shops are short-handed this week, and many supply houses run their own job boards.
• Your utility's trade ally or qualified contractor list, which is a pre-filtered list of employers who invest in training.
• The UA or SMART local for apprenticeship application windows and referral work, plus the MCAA/MSCA, ABC, PHCC and ACCA chapter member directories as a company list to work through.
• Institutional portals: hospital systems, universities, school districts, airport authorities, county and state HR sites, and USAJOBS for federal facilities maintenance. Search "HVAC", "refrigeration", "stationary engineer" and "maintenance mechanic" separately, because the titles differ.
• "Superheat is high and subcooling is low. What does that tell you, and what do you check next?"
• "How do you charge a fixed-orifice system? A TXV system? A ductless mini-split with a 50-foot line set?"
• "Walk me through your evacuation procedure." They want core removal tools, micron gauge and a decay test, not "I pull a vacuum for thirty minutes".
• "Compressor is running, low side is in a vacuum. What is going on?"
• "Unit is short-cycling on the hottest day of the year. First three things you check?"
• "Customer says the upstairs never cools. Where do you start?" The expected answer involves airflow and static pressure, not refrigerant.
• "How do you verify a gas furnace is safe before you leave?"
• "What do you do differently on an A2L system than on R-410A?"
• "Your diagnosis says the system needs an eight hundred dollar repair and the customer wants a quote for a new system instead. What do you do?"
• "What tools do you own?" This is a competence question disguised as a logistics question.

The resume, the tools, and what you show up with

Resume advice written for office work is actively harmful here. No summary paragraph about your passion for excellence, no skills graphic. One page, two at most if you have fifteen years and a long equipment list. It is read in well under a minute by a service manager who is behind on calls, and at the larger companies it is parsed by an applicant tracking system first, which is the only reason the keyword list at the end of this article exists.

The first six lines must answer: which EPA 608 type and when, which license or registration and issued by whom with the number, driver's license status and whether your record is clean, availability and whether you will take on-call, how far you will travel, and whether you own hand tools. A service manager who cannot find the 608 card in five seconds assumes you do not have one.

Then the body, which is a list of what you have worked on rather than a list of adjectives. For each employer, name the lane (residential service, light commercial, supermarket refrigeration), the equipment with real units, and the brands. "Diagnosed and repaired 2 to 25 ton rooftop units, Carrier and Trane, including economizer and VAV box faults" tells a manager more than any paragraph. "Serviced 150 to 400 ton water-cooled centrifugal chillers, Daikin and York, including oil and refrigerant analysis" puts you in a different pay band. "Installed and commissioned Mitsubishi and Daikin VRF, up to 12 indoor units per system" names a scarcity skill.

Include the instruments and procedures, because they are the proof you diagnose: micron gauge and decay testing, combustion analyzer with CO readings in ppm air free, manometer and total external static pressure, clamp meter and megohmmeter, superheat and subcooling, nitrogen purge brazing, recovery and charge weighing, leak detection and documentation. Name what you measure, in units.

Numbers that are real and belong on the page: calls completed per day, your own callback rate if you track it, first-time fix rate if the company reported one to you, system tonnage ranges, chiller tonnage, square footage or unit count of a portfolio you maintained, number of units on a maintenance route. Numbers that do not belong: borrowed company-wide metrics, customer satisfaction claims you cannot evidence, and sales figures inflated by a commission structure you no longer remember.

Never list a certification you do not hold. NATE publishes a verification lookup, manufacturers keep training records, and state boards are searchable. "Attended the factory VRF class" is a true and useful thing to write. "VRF certified" when you are not is the fastest way to be remembered badly in a city with twenty employers.

On references, line up two or three service managers or lead technicians who will take a call, ask each of them first, and bring the list when you are asked. In this trade a technician's reputation travels by phone between a small number of people, and that call is usually the actual hiring decision.

Finally, the question nobody answers for first-years: what you are expected to own, and what the company supplies. Confirm it before buying anything, because tool lists vary and a pre-made kit usually means buying some of it twice.

• Hand tools you are generally expected to own: insulated screwdrivers and nut drivers, adjustable and ratcheting wrenches, service valve wrench, needle-nose and side-cutting pliers, wire strippers and crimpers, tin snips, hammer and drill, tape measure, torpedo level, inspection mirror, flashlight and headlamp, tubing cutter, reamer, flaring and swaging tools, and a bag to carry it.
• Instruments to acquire in roughly this order, as you earn: a quality clamp multimeter, a digital manifold or Bluetooth probe set, a micron gauge, a digital thermometer and psychrometer, a manometer, a leak detector, a combustion analyzer (the expensive one, and the one that separates technicians), a megohmmeter, and a vacuum pump and recovery machine if your employer does not supply them.
• A2L-rated recovery machine, vacuum pump, gauges and leak detector where you are servicing new equipment. If the employer has not bought them, ask when they intend to.
• What most employers supply: the van, ladders, gauges in some shops, recovery equipment, torches and tanks, specialty tools, nitrogen and refrigerant, and task PPE. Confirm rather than assume, and get the tool and training policy in writing.
• Boots: leather, over the ankle, slip resistant. Buy for ten hours of standing and climbing, own two pairs so one can dry, and expect to replace them yearly.
• Cards, with dates, renewed ninety days early: EPA 608, OSHA 10 or 30, first aid and CPR, fall protection, aerial and scissor lift, forklift, confined space where relevant, plus any owner-specific site orientation for hospital, airport or data center work.

What a screen is looking for

These are the terms that a resume screen, human or automated, is matching against for this role. Use the ones that are true of you, in the words the posting uses.

• HVAC technician
• HVACR technician
• HVAC service technician
• HVAC installer
• HVAC install helper
• Refrigeration technician
• Maintenance technician
• Maintenance mechanic
• Lead installer
• Residential service technician
• Light commercial technician
• Commercial HVAC
• EPA 608
• EPA Section 608
• EPA 608 Universal
• Type I certification
• Type II certification
• Type III certification
• EPA Section 609
• NATE certified
• NATE core
• NATE specialty
• HVAC Excellence
• RSES
• NCCER
• RETA CARO
• RETA CIRO
• NEBB
• TABB
• Tridium Niagara 4
• OSHA 10
• OSHA 30
• Journeyman HVAC license
• Master HVAC license
• Mechanical contractor license
• HVAC tradesman license
• C-20 contractor
• Registered apprenticeship
• UA apprenticeship
• SMART sheet metal
• Apprentice technician
• R-410A
• R-454B
• R-32
• R-22 retrofit
• R-134a
• R-404A
• R-448A
• R-449A
• R-744 CO2 transcritical
• R-717 ammonia
• A2L refrigerant
• A2L training
• Refrigerant detection system
• UL 60335-2-40
• ASHRAE 34
• ASHRAE 15
• AIM Act
• HFC phasedown
• GWP
• Refrigerant recovery
• Refrigerant leak detection
• Refrigerant recordkeeping
• Charge weighing
• Superheat
• Subcooling
• TXV
• Fixed orifice
• Micron gauge
• Deep vacuum
• Decay test
• Nitrogen purge brazing
• Pressure testing
• Brazing
• Line set
• Flare connection
• Split system
• Packaged rooftop unit
• RTU
• Heat pump
• Cold climate heat pump
• Mini split
• Ductless
• VRF
• VRV
• Inverter compressor
• Variable capacity
• Communicating system
• Gas furnace
• Oil furnace
• Electric furnace
• Boiler
• Hydronics
• Chiller
• Air cooled chiller
• Water cooled chiller
• Centrifugal chiller
• Screw chiller
• Absorption chiller
• Cooling tower
• Air handling unit
• VAV
• Economizer
• Makeup air unit
• Exhaust fan
• CRAC
• CRAH
• Liquid cooling
• Coolant distribution unit
• Data center cooling
• Mission critical
• Parallel rack
• Walk-in cooler
• Walk-in freezer
• Ice machine
• Defrost control
• Case controller
• Building automation system
• BAS
• BACnet
• Modbus
• Metasys
• Desigo
• Automated Logic
• Distech
• Honeywell controls
• Sequence of operation
• Fault detection and diagnostics
• Commissioning
• Method of procedure
• Test and balance
• Static pressure
• Total external static pressure
• Manometer
• Combustion analyzer
• Carbon monoxide testing
• Draft test
• Temperature rise
• Gas pressure
• Heat exchanger inspection
• Manual J
• Manual S
• Manual D
• Load calculation
• Duct design
• Sheet metal duct
• Flex duct
• Airflow measurement
• Indoor air quality
• SEER2
• EER2
• HSPF2
• International Mechanical Code
• International Fuel Gas Code
• Uniform Mechanical Code
• NFPA 54
• NFPA 58
• Manufacturer installation instructions
• Mechanical permit
• Code compliance
• Lockout tagout
• Confined space
• Fall protection
• Aerial lift
• Forklift certified
• Multimeter
• Megohmmeter
• Clamp meter
• Wiring diagram
• Contactor
• Capacitor
• ECM motor
• Blower motor
• Compressor replacement
• Coil replacement
• Preventive maintenance
• Planned maintenance agreement
• Service agreement
• On-call rotation
• First time fix
• Callback rate
• Flat rate pricing
• ServiceTitan
• FieldEdge
• Housecall Pro
• ServiceTrade
• BuildOps
• measureQuick
• Bluetooth probes
• Clean driving record
• Valid driver's license
• Own hand tools

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