Trade · ONET 49-9021.00
HVAC Technician
Installs, maintains, and repairs heating, ventilation, air conditioning, and refrigeration systems.
What the work looks like
HVAC work splits between new installation, preventive maintenance, and service calls. A residential service tech drives between homes diagnosing condensers, furnaces, heat pumps, mini-splits, and thermostats. A commercial tech works on rooftop units, packaged chillers, cooling towers, VAV boxes, and building automation systems. A refrigeration specialist handles walk-in coolers, ice machines, reach-ins, and supermarket rack systems; many in this subfield are on an after-hours call rotation. Controls technicians focus on DDC programming and sensor calibration and often come up through a commercial service route. Career progression typically runs apprentice to journeyman to lead installer or lead service tech, then to service manager, estimator, or business owner.
Physical demands
- Rooftop work in sun, heat, and cold
- Carrying refrigerant recovery equipment, gauges, and recovery tanks
- Crawling into attics, crawl spaces, and mechanical rooms
- Working with refrigerants and solvents with EPA 608 certification required to purchase or handle
- Using brazing torches and handling pressurized nitrogen
- Climbing service ladders and working near rooftop edges with fall protection
- Driving between service calls for most of the day in the service role
Common tools
- Digital manifold and refrigerant gauges
- Vacuum pump and micron gauge
- Refrigerant recovery machine and recovery cylinder
- Clamp meter with temperature leads
- Combustion analyzer for gas work
- Brazing torch and nitrogen regulator
- Core-removal and valve-depressor tools
- Laptop or tablet running building-automation vendor software for controls work
Union and non-union paths
HVAC is one of the less-unionized construction-and-maintenance trades by headcount. SMART (Sheet Metal Workers) represents many commercial installers on the ductwork and air-handling side. UA locals represent pipefitters working on hydronic and chiller systems. The service side of the trade, and most residential work, is largely non-union. Industry associations include ACCA for commercial and residential contractors, MSCA for commercial service, and RSES for service technicians. Training bodies run the range from 2-year trade school programs to registered apprenticeships to manufacturer certifications.
How to enter
Entry routes include 2-year trade school programs, registered apprenticeships through SMART or UA locals, and employer-sponsored programs at service and install contractors. EPA Section 608 certification is required by federal law to purchase or handle refrigerants and is the first credential most employers look for. NATE certification is a widely recognized journey-level credential. State licensing requirements for HVAC vary sharply: some states license at the journeyman and contractor level, others delegate to county or city authorities, and a handful do not license HVAC at the state level at all. Military HVAC MOS and rating crosswalks exist at many programs, with advanced standing decided case by case.
Specialty paths in this trade
Most states license one hvac technician classification, but the work splits into distinct paths with different schedules, tools, and wage schedules. Read before choosing a program.
Residential Service and Install
Service calls and new installs at single-family and light multi-family homes. Covers split systems, heat pumps, furnaces, mini-splits, water heaters where scoped, and duct work. The largest labor pool in the trade.
Typical scope
- Condenser and furnace diagnosis, repair, and replacement
- Heat-pump install and retrofit, including cold-climate units
- Mini-split and ducted-system install
- Duct design, install, and sealing on retrofit work
- Seasonal preventive maintenance routes
Entry: 2-year trade school program, registered apprenticeship, or employer-sponsored entry. EPA 608 is the first credential. NATE core certification is commonly added within the first 1 to 2 years.
Wage note: Residential service commonly pays hourly plus commission on installs or billed repairs. Summer and winter peaks drive heavy overtime in most markets.
Commercial Service and Controls
Rooftop units, chillers, cooling towers, VAV and VRF systems, and direct digital controls in offices, schools, hospitals, and retail. Controls work is a growing subfield tied to building-automation systems.
Typical scope
- Rooftop packaged unit service and replacement
- Chiller, boiler, and cooling-tower maintenance
- VAV, VRF, and built-up air-handler service
- Building automation programming on BACnet, Niagara, Tridium, and vendor platforms
- Chilled-water and hydronic system troubleshooting
Entry: Apprenticeship or trade-school entry, then commercial service shop experience. Controls specialists typically layer vendor-specific training (Niagara, JCI Metasys, Siemens Desigo) on top of core HVAC skills.
Wage note: Commercial service wage schedules commonly sit above residential service in the same region. Controls specialists commonly sit at the top of the commercial service ladder.
Commercial Refrigeration
Walk-in coolers, reach-ins, supermarket rack systems, ice machines, and cold-storage warehouses. The qualified labor pool is smaller than HVAC and demand is steady from grocery, food service, and cold-chain logistics.
Typical scope
- Supermarket rack system service and retrofit
- Walk-in cooler and freezer install and service
- Ice machine and reach-in service
- CO2 and low-GWP refrigerant transitions under the AIM Act
- After-hours call rotations for temperature-critical failures
Entry: Commercial refrigeration apprenticeship, RSES coursework, or employer-sponsored training at a refrigeration contractor. EPA 608 Type II and Universal are the baseline; NATE Commercial Refrigeration is commonly added.
Wage note: Commercial refrigeration wage schedules commonly sit at or above commercial HVAC service in the same market because the qualified pool is smaller and off-hours call coverage is expected.
Residential, commercial, industrial
Residential service is the largest segment by headcount. Commercial and controls work sits on larger equipment with more coordination. Commercial refrigeration is a smaller, specialized segment with steady demand from grocery and cold storage.
Residential
Single-family and light multi-family service and install. Heat-pump retrofit demand is being driven in part by the federal 25C Energy Efficient Home Improvement Credit (up to $2,000 for qualifying heat pumps) and state rebates; check current terms at energystar.gov and DOE. Schedule is peak-driven by summer and winter weather.
Commercial
Rooftop packaged units, chillers, VAV, VRF, and built-up systems. Controls and building-automation work is a growing subfield. Predictable maintenance contracts balance emergency service. Wage schedules commonly sit above residential service in the same region.
Industrial
Process cooling, plant HVAC, and data-center cooling. Overlaps with refrigeration on heat-rejection and low-temperature systems. Shutdown and commissioning schedules drive overtime cycles.
Certifications that unlock premium work
Credentials beyond the state license. Each one opens a specific segment of work where the qualified pool is smaller.
EPA Section 608 ↗
Federal requirement under the Clean Air Act to purchase or handle refrigerants. Type I (small appliances), Type II (high-pressure), Type III (low-pressure), and Universal. The first credential employers look for. Source: 40 CFR Part 82 Subpart F.
Issuer: U.S. Environmental Protection Agency
NATE Core and Specialty Certifications ↗
North American Technician Excellence is the largest non-profit HVAC certification body. Core certification plus specialty exams (Air Conditioning, Heat Pumps, Gas Furnaces, Commercial Refrigeration, HVAC Efficiency Analyst). Commonly referenced in warranty and rebate programs.
Issuer: North American Technician Excellence (NATE)
HVAC Excellence Certifications ↗
Employment-ready and professional-level certifications commonly referenced in state licensing and trade-school accreditation. Overlap with NATE on several specialties; some employers accept either.
Issuer: ESCO Institute / HVAC Excellence
RSES CMS and CM ↗
Refrigeration Service Engineers Society Certificate Member (CM) and Certificate Member Specialist (CMS) credentials. Long-standing service-technician recognition in the commercial refrigeration segment.
Issuer: Refrigeration Service Engineers Society (RSES)
Natural Refrigerants Training (NASRC) ↗
CO2 and hydrocarbon refrigerant systems are displacing high-GWP HFCs under the AIM Act. Natural-refrigerant-certified technicians are a limited pool and demand is growing in the supermarket and cold-storage segment.
Issuer: North American Sustainable Refrigeration Council (NASRC)
Building Automation Controls Training (BACnet and Niagara) ↗
Commercial controls work increasingly runs on open BACnet protocols and Tridium Niagara framework. Vendor-specific training on Niagara, JCI Metasys, Siemens Desigo, and similar platforms is commonly requested on large commercial contracts.
Issuer: Tridium and other vendor programs
Tool and equipment investment
Apprentice, year 1
$400 to $900 for a basic kit: gauge set, vacuum pump or access to one, hand tools, clamp meter, torch kit, and PPE. Some shops supply recovery machines and vacuum pumps; many do not.
Journey level
$4,000 to $10,000 over time for a full personal kit: digital manifold, quality vacuum pump and micron gauge, recovery machine and cylinder, combustion analyzer, clamp meter with temperature leads, and cordless tools.
Going independent
$35,000 to $100,000 for a service truck, stock, recovery and leak-detection equipment, vacuum and nitrogen rigs, and commercial-grade diagnostic tools. Refrigeration-focused independents sit at the top of the range due to larger recovery and oil-handling equipment.
Shop-supplied tools vary by contractor. Recovery machines, combustion analyzers, and some meters are commonly shop property. Ask during hiring what comes with the truck and what the tech is responsible for.
Wages
National median
$59,810
annual, all workers
National mean
$62,690
annual, all workers
By pilot state
BLS Occupational Outlook projections for HVAC installers and mechanics are published together on the linked OOH page. Current demand drivers include heat-pump retrofits, data center cooling, refrigerant phase-outs under the AIM Act that are driving equipment replacement, and building automation upgrades in commercial stock. Local demand varies by climate and construction cycle.
BLS OES wages shown on this page are statewide median and mean across residential service, commercial service, and refrigeration combined. Major commercial and refrigeration markets (Seattle, Chicago, NYC, SF Bay, DC) often pay 15 to 30 percent above their statewide median. Commercial refrigeration and controls specialists commonly earn above the straight HVAC journey-level median in the same market. Source: BLS OES by area, https://www.bls.gov/oes/tables.htm.