HVAC work touches more building systems than almost any other trade. A single installation involves electrical connections, gas piping, refrigerant, condensate drainage, roof penetrations, ductwork, and controls — often inside an occupied building.

Each of those introduces a different way for a job to go wrong, and several of them run into policy exclusions most contractors have never had explained.

What General Liability Actually Pays For

Start with the provision that determines what a claim costs you.

A standard general liability policy does not pay to redo your own defective work. The “your work” exclusion removes that. What responds is the resulting damage.

Applied to HVAC: if an improperly pitched condensate line floods a ceiling, the policy may cover the drywall, insulation, flooring, and contents below — but it will not cover returning to repipe the line correctly.

Care, custody, and control is the second one. Policies generally exclude damage to property in your control and to that part of the property you are working on. Since service work happens inside finished homes and businesses, that gets tested on routine calls.

Water Damage Is the Signature Claim

Condensate is the most common source of HVAC property damage, and it is insidious because it develops slowly.

A line pitched wrong, a clogged drain, a pan that was not properly sealed, a secondary drain that was never connected — the water appears weeks or months later as staining, deteriorated drywall, damaged flooring, and ruined ceilings.

In multi-unit buildings the exposure multiplies. An air handler in a closet on an upper floor of a condominium or hotel can send water through units the technician never entered, producing claims from multiple owners and their insurers.

For contractors doing condominium and hospitality work in Florida, this is the exposure that should set the liability limit.

Mold and Indoor Air Quality Sit Behind an Exclusion

This is the gap that matters most and gets discussed least.

HVAC systems manage moisture, and in Florida’s humidity a system that fails to do so produces mold. Undersized equipment, poor ventilation, oversized units that short-cycle without dehumidifying, a condensate leak inside a wall — all of these generate mold claims, and the contractor who installed or serviced the system becomes the defendant.

Standard general liability policies exclude fungi and bacteria. That means a mold claim arising from your work may have no coverage behind it unless specific coverage was added.

Indoor air quality claims follow a similar path. Allegations that a system caused illness, distributed contaminants, or failed to ventilate properly can involve both bodily injury and the same exclusion.

For a trade whose entire function is managing air and moisture in a humid climate, confirming how your policy treats fungi and IAQ is not optional. Some carriers offer limited coverage by endorsement; others exclude it absolutely.

Carbon Monoxide and Gas Work

Any contractor connecting gas appliances, venting combustion equipment, or working on flues carries a bodily injury exposure with severe consequences.

An improper connection, a blocked or incorrectly sized vent, or a heat exchanger issue not caught during service can produce carbon monoxide exposure. These claims are rare and catastrophic, and they are the reason liability limits on this trade should not be set at the minimum a contract requires.

Refrigerants, A2L Equipment, and the Pollution Exclusion

The industry transition to lower global warming potential refrigerants has changed both the equipment and the risk profile.

New residential and light commercial systems increasingly use refrigerants such as R-454B and R-32, which are classified A2L — mildly flammable. That has brought revised installation practices, leak detection requirements in certain applications, updated codes, and new tools and training. Contractors have invested significantly to stay compliant.

Two insurance consequences follow.

Flammability changes the exposure. A refrigerant leak in an occupied space is a different event than it was with R-410A, and carrier appetite for A2L work varies. Confirm your operations are disclosed accurately.

Releases run into the pollution exclusion. Standard general liability policies exclude discharge of pollutants, and refrigerant releases can fall within that definition — alongside chemical treatment for water systems and oil or fuel from equipment. Contractors performing refrigeration work or equipment decommissioning should confirm whether contractors pollution liability belongs in the program.

Rooftop Work Creates Two Separate Claims

Replacing a rooftop unit puts you on someone else’s roof with heavy equipment.

Penetrations and roof damage. A curb sealed improperly, flashing disturbed, or membrane damaged during the work produces leaks that surface after the next heavy rain — and the building owner has a roofing claim and an HVAC claim that point at the same contractor.

Rigging and setting equipment. A dropped or damaged unit during a crane lift is a property loss and a schedule loss at once. If the lift damages the building or injures someone, it becomes a liability claim. Where the crane operator is a subcontractor, responsibility gets argued afterward — confirm their coverage and certificate before the lift, not after.

Falls from height apply here as well, and carriers may restrict by building height or number of stories.

Completed Operations and the Statute of Repose

HVAC claims arrive late. Condensate damage, coil failures, undersized systems that never performed, and mold behind walls all surface well after the invoice is paid.

Completed operations coverage responds to claims from finished work. Florida’s statute of repose, shortened from ten years to seven by Senate Bill 360 in 2023, generally runs from the earliest of the certificate of occupancy, certificate of completion, or abandonment of construction, with four years from discovery on the limitations side.

Some commercial contracts require completed operations coverage be maintained for a stated period after the project closes. Confirm your limits meet your largest contract requirement.

Equipment Before It Is Installed

An installation floater covers equipment from the point you take responsibility until installation is complete and accepted.

This matters because a rooftop unit, air handler, or chiller staged at a jobsite is neither at your premises nor yet the owner’s property — which puts it outside a commercial property policy. On commercial work the values involved make this a meaningful gap.

Confirm the limit reflects your largest single unit, that coverage applies in transit and during jobsite storage, and when it ends.

Subcontractors and the Audit

A subcontractor who cannot produce a current certificate showing their own general liability and workers’ compensation typically has their payroll charged back to you at audit as if they were your employee.

Collect certificates before work begins, confirm the dates cover the project, and keep them. Their errors also become your claim, since the customer’s contract is with you.

Service Fleets Carry Real Auto Exposure

HVAC companies run more vehicles per employee than most trades, covering high mileage across residential and commercial routes daily, often with emergency calls at night and in summer heat.

Confirm hired and non-owned auto coverage is in place for employees using personal vehicles, that driver records are checked at hire and periodically, and that the liability limit reflects what a serious accident involving a service vehicle produces.

Related coverage: Business Auto Insurance · Workers’ Compensation Insurance · General Liability Insurance · Commercial Property Insurance

Contract Requirements Have Become the Gate

General contractors, property managers, condominium associations, municipalities, hospitals, universities, and corporate clients require certificates before work begins — specifying limits, additional insured status covering ongoing and completed operations, waiver of subrogation, and primary and non-contributory wording.

Each is a separate endorsement, and a certificate showing adequate limits can still fail a contract if one is missing. Contractors who can produce compliant certificates quickly move through bidding faster than those scrambling after award.

Related coverage: Commercial Umbrella Insurance

HVAC or Mechanical?

The distinction matters for placement.

An HVAC contractor focuses on heating, ventilation, air conditioning, refrigeration, indoor air quality, and climate control — residential installations, rooftop units, ductwork, heat pumps, and maintenance agreements.

A mechanical contractor performs a broader scope: boilers, industrial and process piping, pumps, compressed air, hydronic systems, cooling towers, central plants, and medical gas — typically on hospitals, manufacturing facilities, universities, and data centers.

Mechanical work generally requires higher limits, professional liability for design-build exposures, larger installation floaters, and broader pollution coverage. Companies expanding from one into the other frequently keep the program that fit the smaller operation.

See our Mechanical Contractor Insurance page if your work includes those systems.

Discuss Your Coverage With Prestige Insurance Group

Prestige Insurance Group works with HVAC contractors throughout Miami-Dade, Broward, Palm Beach County, Orlando, Tampa, Jacksonville, Southwest Florida, the Treasure Coast, and across the state — from owner-operators to companies running multiple installation crews.

If you work in multi-unit buildings, handle refrigerants, or perform rooftop replacements, how your policy treats mold, pollution, and completed operations are the three things worth confirming first.

Miami: 305-969-8776 Orlando: 407-993-2331 Stuart: 561-983-4333

Se Habla Español.

Related Contractor Resources

Contractor Insurance · Mechanical Contractor Insurance · Plumbing Contractor Insurance · Electrical Contractor Insurance · Roofing Contractor Insurance · Builders Risk Insurance

This page describes general insurance concepts and Florida statutory provisions as of publication. It is not legal advice, and regulatory, contract, or claims questions should be reviewed with your agent or an attorney.