Class code 5537: HVAC
Class 5537 is the NCCI workers' comp code for “Heating, Ventilation, Air-Conditioning and Refrigeration Systems — Installation, Service and Repair, Shop, Yard & Drivers”. In plain words: hvac.
The facts
- Official wording (NCCI)
- Heating, Ventilation, Air-Conditioning and Refrigeration Systems — Installation, Service and Repair, Shop, Yard & Drivers
- In plain words
- HVAC
- Industry group (our dictionary)
- Construction—Specialty Trades
- Hazard group
- Not listed in our dictionary
- State codes that differ
- None in our dictionary
- Line
- Workers' comp
What it means
Class 5537 is the code carriers use to rate workers' comp payroll for this kind of work.
Drivers who work for the business are rated in this same code.
Who writes class 5537, state by state
From our live eligibility engine, refreshed every day (page updated November 1, 2026). It shows who has appetite, not a price. The final decision is always the carrier's underwriter.
Instant quote available 47
By email or underwriter only 0
No market listed yet 0
State fund only 4
North Dakota (North Dakota Workforce Safety & Insurance) · Ohio (Ohio Bureau of Workers' Compensation) · Washington (Washington Department of Labor & Industries) · Wyoming (Wyoming Department of Workforce Services)
Carriers with appetite for class 5537
- biBERK · 46 states · instant quote
- Employers · 45 states · instant quote
- Travelers · 45 states · instant quote
- AmTrust · 43 states · instant quote
- Markel · 43 states · instant quote
- Normandy Harbor Insurance Company · 20 states · instant quote
- CopperPoint · 19 states · instant quote
- Chubb · 47 states
- Clear Spring · 47 states
- FCBI · 47 states
- Guard · 47 states
- Key Risk · 47 states
- PIE- Sirius America Insurance Company · 47 states
- V3- National Liability & Fire Insurance Company · 47 states
- WR Berkley Small Business · 47 states
- Amtrust - Security National Insurance Company · 46 states
- Ascendant Commercial Insurance · 46 states
- Trean / 7710 Insurance · 46 states
- Trean / American Liberty Insurance Company · 46 states
- Cimarron Insurance Company · 29 states
- Amerisafe · 28 states
- Omaha National · 28 states
- ICW Group · 22 states
- Accident Insurance Company · 15 states
- AIG · 7 states
- Accident Fund Insurance Company Of America · 5 states
- Hartford · 2 states
What does class code 5537 cover?
Class 5537 is the NCCI workers' comp code for “Heating, Ventilation, Air-Conditioning and Refrigeration Systems — Installation, Service and Repair, Shop, Yard & Drivers” — in plain words, hvac. Carriers use it to rate the payroll of people doing this kind of work.
Who writes class code 5537 workers' comp?
In our live appetite data (updated November 1, 2026), 27 carriers have appetite for class 5537 in at least one state, and 7 of them quote it instantly. An instant quote is available in 47 states. The final decision is always the carrier's underwriter.
Does every state use class code 5537?
Our dictionary lists no different code for California, Delaware, Michigan, New Jersey, New York, Pennsylvania or Texas. North Dakota, Ohio, Washington and Wyoming write workers' comp through the state fund.