Requirements guide
HVAC work spans mechanical, electrical, and gas systems. Here is what coverage to require and what trade-specific risks to check for.
HVAC subcontractors touch mechanical, electrical, and sometimes gas systems on the same project. That scope means the liability exposure spans the work itself, combustion risk from gas appliances, and refrigerant handling, each of which creates different coverage considerations.
Standard GL and workers' comp cover the core risk, but verify the class codes cover both heating and cooling work, and ask about pollution liability if refrigerant handling is in scope.
| Policy | Typical limit | Why it matters |
|---|---|---|
| General Liability | $1M per occurrence / $2M aggregate | Covers third-party injury and property damage from HVAC installation and service, including post-project equipment failure claims. |
| Workers' Compensation | Statutory limits | HVAC crews work on rooftops, in crawl spaces, and with electrical components. Workers' comp is required for any employee. |
| Commercial Auto | $1M combined single limit | HVAC trucks carry significant equipment; auto coverage protects against incidents during travel to and from your site. |
| Umbrella / Excess Liability | $1M to $2M+ (project-dependent) | Commonly required on commercial projects, especially where HVAC interfaces with fire suppression or electrical systems. |
| Pollution Liability | $1M (if refrigerant work involved) | Refrigerant release may trigger the pollution exclusion in a standard GL policy. Verify or add pollution liability for any scope involving refrigerant charging or recovery. |
Typical limits reflect common GC contract requirements as of 2026. Actual requirements vary by contract, project size, owner, and jurisdiction.
When you receive the certificate of insurance from a hvac contractor, check each of the following before approving the document.
Refrigerant as a pollutant
Standard GL policies often define pollutants broadly enough to exclude refrigerant releases. A refrigerant leak into a building can cause significant property damage and health claims. If the HVAC scope includes refrigerant work, verify pollution liability is in force.
Carbon monoxide exclusions
Some GL policies contain combustion or carbon monoxide exclusions for gas appliance installation and service. A furnace or boiler malfunction causing CO exposure could trigger a large claim that the policy declines to cover. Ask specifically about CO exclusions if the scope includes gas equipment.
Class codes covering only heating or only cooling
GL and workers' comp class codes are often split between heating and air conditioning work. A policy written for one may not respond to a claim from the other. Confirm the declarations page covers both heating and cooling for a full HVAC scope.
Completed operations for equipment failures
HVAC systems run year-round. A faulty installation might not cause a claim until the first hard winter or the first summer heat. Completed operations coverage must be in place at the time of the claim, not just at project close.
Track hvac contractors COIs without the spreadsheet
CoiLoop collects certificates through no-login links, uses AI to read each COI and check it against your requirements, and warns you before anything expires. Free to start, no demo required.
General liability ($1M/$2M), workers' compensation, and commercial auto at minimum. Add pollution liability if refrigerant work is in scope, and an umbrella for commercial projects.
If the scope involves refrigerant charging, recovery, or any work with HVAC systems that use refrigerants, yes. Standard GL pollution exclusions can bar coverage for refrigerant releases, which can be expensive claims.
The policy should cover the actual work type: sheet metal workers, pipe fitters, or HVAC technicians as appropriate. A policy rated only for light commercial HVAC service may not cover heavy industrial ductwork installation.
Yes. HVAC equipment runs continuously after installation. Failures from installation defects often occur months after the contractor leaves the site. Completed operations covers those post-project claims.
This guide reflects typical GC requirements and general industry practice as of June 2026. Insurance requirements vary by contract, project type, jurisdiction, and owner. CoiLoop organizes documents and reminders and does not provide insurance advice or certify coverage.