Yes.
BLS says HVAC technicians have one of the highest rates of injuries and illnesses of all occupations.
Separately, in BLS's 2023–2024 injury survey, HVACR mechanics and installers logged 214.5 days-away-from-work cases per 10,000 full-time workers, against an all-occupation rate of 86.6.
The risks are specific — electricity, refrigerant (some of it now mildly flammable), heat, falls, confined spaces — and this page walks through what the federal data and rules actually say about each.
What are the biggest hazards for HVAC techs?
BLS's career description of the trade names the injury mechanisms outright: burns from electrical parts or chemicals, and muscle strains or sprains from handling heavy equipment.
Alongside those sit the settings the work happens in — rooftops, mechanical rooms, attics, outdoor units in January and July.
- Electricity. The trade works on powered equipment — condensers, air handlers, furnaces, control wiring — and electrical parts are one of BLS's named burn sources for the occupation. Two OSHA standards matter here: the general-industry electrical rule (de-energize first) and lockout/tagout — the control of hazardous energy during servicing and maintenance (more on both below).
- Refrigerant. Refrigerant is the trade's working chemical, and the refrigerants themselves are hazard-classed: EPA treats refrigerants like R-32 and R-454B as flammable or mildly flammable, and says SNAP and industry standards prohibit putting them into systems not designed for them.
- Heat and cold. In O*NET's survey, 58% of HVACR mechanics report working outdoors in all weather every day, and 34% report very hot (above 90°F) or very cold (below 32°F) temperatures every day. Those are exposure frequencies, not injury counts.
- Falls and heights. 31% of HVACR mechanics tell O*NET they're exposed to high places every day. OSHA's construction fall-protection rule covers workers on a surface with an unprotected side or edge 6 feet or more above a lower level.
- Confined spaces. Confined spaces are identified before work begins, site by site: on construction sites, the employer must have a competent person identify all confined spaces, and which are permit spaces.
- Silica dust. Coring or cutting concrete or masonry for piping and ducts is where OSHA's construction silica standard becomes relevant: it applies to respirable crystalline silica except where exposure stays below 25 µg/m³ (8-hr TWA) and sets a PEL of 50 µg/m³.
Where does the injury data land?
BLS's 2023–2024 table breaks the days-away cases down by event — falls, slips and trips and overexertion and bodily reaction among the categories it measures.
The next section has the numbers.
How common are HVAC injuries and deaths? The BLS numbers
The source is BLS's Survey of Occupational Injuries and Illnesses — its Table R100, private industry, rates per 10,000 full-time workers, 2023–2024 annualized.
For HVACR mechanics and installers (SOC 49-9021):
| Measure (cases per 10,000 full-time workers) | HVACR mechanics | All occupations |
|---|---|---|
| Days away from work (DAFW) | 214.5 | 86.6 |
| DART (days away, restricted, or transferred) | 330.3 | 140.8 |
HVACR's 214.5 days-away rate sits against an all-occupation rate of 86.6 — same table, same measure, same years.
Within those cases, among the event categories BLS breaks the days-away cases into: falls, slips and trips at 59.0 cases per 10,000 workers (28.0 of them falls to a lower level), and overexertion and bodily reaction at 49.1.
There is also an industry-level view, and it comes in a different unit: plumbing, heating, and air-conditioning contractors (NAICS 23822) recorded 3.0 total recordable injury and illness cases per 100 full-time workers in 2024, above all private industry at 2.3 and construction overall at 2.2.
Per 100 workers is not per 10,000 — read the two rates side by side as separate measures, not as a ranking.
Deaths are a separate series.
The survey above counts nonfatal cases; fatal work-injury counts come from BLS's Census of Fatal Occupational Injuries, and our research for this page didn't capture the CFOI figure for HVACR mechanics — so we're not going to quote a death count.
BLS's CFOI tables are where the current number lives.
Electrical safety: lockout/tagout on the job
The general-industry electrical rule (29 CFR 1910.333) requires live parts an employee may be exposed to be de-energized before work on or near them — unless the employer can show that de-energizing introduces additional hazards or is infeasible.
Parts under 50 volts to ground are the carve-out: they need not be de-energized where there's no added exposure to burns or arc risk.
De-energizing is one thing; keeping it de-energized is another.
That's lockout/tagout: OSHA's standard 29 CFR 1910.147 covers the control of hazardous energy during the servicing and maintenance of machines and equipment.
The standard carves out cord-and-plug equipment when unplugging controls the hazard and the plug stays under the servicing employee's exclusive control.
The infeasibility exception in 29 CFR 1910.333 is the employer's to show, not the technician's.
What that leaves a technician on the call is the de-energize-first default — the rule, with the exceptions the standard defines.
Refrigerant, CO and A2L flammability risks
The federal gate on refrigerant work is EPA Section 608 — under 40 CFR 82.161, any person who could reasonably be expected to violate the integrity of the refrigerant circuit while maintaining, servicing, repairing or disposing of appliances containing CFC/HCFC or non-exempt substitute refrigerants (such as HFCs) must pass an exam from an EPA-approved technician certification program.
Our EPA 608 certification guide covers that card in full.
The chemistry side is where the safety classes live.
Refrigerant safety classes come from ASHRAE Standard 34, "Designation and Safety Classification of Refrigerants" — the current edition ASHRAE lists is 34-2024.
EPA treats refrigerants like R-454B and R-32 as flammable or mildly flammable, and says SNAP and industry standards prohibit putting them into systems not designed for them — there are no A2L drop-ins.
What the flammability class changes on the truck is the subject of our A2L refrigerants guide.
Carbon monoxide is the hazard our data answers worst.
The federal sources pulled for this page — BLS's injury survey and OSHA's standards — don't break out carbon-monoxide exposure for HVACR technicians, so this page won't quote a CO risk figure.
The nearest surveyed measure O*NET offers is broader: exposure to contaminants — pollutants, gases, dust, odors — which 68% of HVACR mechanics report every day.
What PPE HVAC techs wear
There is no federal list we can quote that says "HVAC techs wear X" — so instead of inventing a gear list, here is what the sourced material tells you protection is for.
BLS names the injury mechanisms: burns from electrical parts or chemicals, and muscle strains or sprains from handling heavy equipment.
O*NET's survey tells you how often the exposures arrive: outdoor weather daily for 58% of the occupation, contaminants daily for 68%, high places daily for 31%.
One place OSHA's rules name gear directly is fall protection.
Under OSHA's construction rule, workers on a surface with an unprotected side or edge 6 feet or more above a lower level must be protected — by guardrails, safety nets or personal fall arrest systems (29 CFR 1926.501(b)(1)).
For everything else — gloves, eye protection, respirators — our research captured no federal gear list for HVAC tasks we could verify, so this page won't hand you one.
What a given task requires is a question for your employer's safety program and the equipment maker's instructions.
Verify the rules before you rely on them
What should your employer provide?
Short answer: the rules above assign their conditions to specific duty-holders — and to specific settings.
In general industry, de-energizing live parts is the default unless the employer shows the exception applies (29 CFR 1910.333); on construction sites, the employer must have a competent person identify confined spaces — and which are permit spaces — before work begins (29 CFR 1926.1203(a)); on construction work, workers on a surface with an unprotected side or edge 6 feet or more above a lower level must be protected (29 CFR 1926.501(b)(1)); and refrigerant-circuit work sits inside EPA's Section 608 certification gate.
On heat there is no final federal OSHA standard as of September 29, 2026 — one was proposed on August 30, 2024.
The employer side of OSHA — which standards apply to service work, whether your techs need OSHA 10 or 30 cards, which hazards require training, injury recordkeeping, and the violations OSHA cites most in these trades — is its own subject, and we cover it for owners and service managers in our OSHA duties for HVAC and plumbing contractors guide.
This page is career information, not legal advice. For the rules that govern a specific job site, confirm with OSHA and your employer's written safety program.