When Your HVAC Install Fails 6 Months Later - How Completed Operations Works for HVAC Contractors

Author: Grit Insurance Group

Your crew installs a rooftop unit on a commercial building. Everything tests fine. The client signs off. You collect your check and move on to the next job.

Six months later, a condensate line fails and floods the office below. Ceiling tiles ruined. Computers destroyed. Carpet soaked through to the subfloor. The building owner's attorney sends you a letter demanding $85,000 in damages.

Here is the question that determines whether your business survives that letter or not: do you have completed operations coverage on your general liability policy?

If the answer is yes, your insurance steps in, covers the defense costs, and pays for the property damage your work caused. If the answer is no, or if your policy was endorsed to exclude it, that $85,000 comes out of your pocket.

Let's walk through exactly what completed operations coverage is, why HVAC contractors need it more than most trades, and the specific scenarios where it saves your business.

What Completed Operations Coverage Actually Is

Completed operations coverage is not a separate policy. It is a built-in part of your Commercial General Liability (CGL) policy. Under the standard ISO CG 00 01 coverage form, your CGL has two main zones of protection:

• Premises and operations - covers bodily injury or property damage that happens while your crew is on the job site doing the work
• Products-completed operations hazard - covers bodily injury or property damage that happens after you finish the work and leave

The ISO form defines the "products-completed operations hazard" as bodily injury or property damage occurring away from premises you own or rent, arising out of "your work," after that work has been completed or abandoned (Insureon).

In plain English: your general liability covers you while you are on the job. Completed operations covers you after you leave.

For HVAC contractors, that second part is where the real exposure lives.

Why HVAC Contractors Face More Completed Operations Risk Than Most Trades

Here is what makes your trade different from a painter or a framing crew. When a painter finishes, the work is visible. If something is wrong, you see it immediately. But when you install a condensate drain line, wire up a control board, charge a system with refrigerant, or connect a gas line - those systems run for months or years before a failure shows up.

The HVAC industry sees over 25,000 insurance claims filed annually, with average claim costs between $25,000 and $50,000. That adds up to more than $1 billion in industry losses every year. A significant portion of those claims happen after the work is done - making completed operations one of the most triggered coverages in the HVAC insurance program.

HVAC systems are also deeply embedded in the buildings they serve. A failed system does not just affect itself. It affects ceilings, walls, floors, electrical systems, inventory, furniture, and the people inside the building. That is what creates large claims.

Five Real Scenarios Where Completed Operations Saves Your Business

These are not hypotheticals. These are the types of claims HVAC contractors actually face.

1. Condensate Line Failure and Water Damage

This is the number one completed operations claim for HVAC contractors. Your crew installs a split system in a second-floor office suite. The condensate drain line is not sloped properly - code requires at least 1/4 inch per foot of fall. Three months later, water backs up, overflows the drain pan, and floods the office below.

Air conditioning systems produce 20 to 50 gallons of condensation daily in humid conditions. When that water has nowhere to go, the damage adds up fast. We are talking ruined drywall, destroyed carpet, damaged electronics, and potential mold remediation - easily a $50,000 to $100,000 claim on a commercial building.

Your completed operations coverage pays for the property damage to the office below. It does not pay to fix the drain line itself - that is your responsibility as the contractor. But it covers everything your faulty work damaged around it.

2. Refrigerant Leak After Installation

Your technician installs a new rooftop unit and charges it with R-410A. A flare fitting was not tightened properly. Over the next several weeks, refrigerant slowly leaks out. The system loses efficiency, then fails. The leaked refrigerant corrodes metal surfaces and damages equipment in the mechanical room.

Beyond the property damage claim, refrigerant leaks carry regulatory exposure. Under EPA Section 608 of the Clean Air Act, knowingly venting refrigerant is illegal. Civil penalties run up to $69,733 per day, per violation as of 2026. The EPA has issued penalties in the hundreds of thousands of dollars to HVAC companies. And as of January 2026, the compliance threshold dropped from 50 pounds to 15 pounds of HFC refrigerant - bringing hundreds of thousands of additional systems under federal oversight.

Completed operations covers the property damage caused by the leak. It does not cover EPA fines - that is a different conversation about pollution liability. But the property damage alone on a refrigerant leak claim can run $20,000 to $100,000 (Contractors Liability).

3. Gas Line Connection Causes Fire

Your crew connects a gas furnace in a residential remodel. A fitting is not properly sealed. Months later, gas accumulates and ignites. The resulting fire damages the home.

This is a bodily injury and property damage scenario. Completed operations covers the damage to the home and any injuries to occupants. The defense costs alone on a fire claim can exceed $100,000 before you even get to the settlement.

4. Improper System Design Causes Mold

You install a system that is undersized for the space. It runs constantly but cannot adequately dehumidify. Within a year, mold starts growing in the walls and ductwork. The building owner discovers a major mold outbreak during a tenant improvement project.

One real-world example: a poorly installed HVAC system caused a major mold outbreak in a $5 million office building, leading to $800,000 in cleanup and legal battles. On major commercial projects, completed operations coverage may be extended for 36 to 120 months post-completion to align with state statutes of repose.

5. Electrical Short from Faulty Wiring

During a system install, your electrician wires the disconnect improperly. A year later, the wiring overheats, damages the control board, and causes an electrical fire in the mechanical closet. The fire suppression system activates, flooding the server room next door.

Now you are looking at fire damage, water damage from the suppression system, destroyed IT equipment, and potential business interruption claims from the tenant. Completed operations is the coverage that responds.

What Completed Operations Does NOT Cover

This is the part most contractors get wrong. Completed operations has a critical limitation you need to understand.

It covers the damage your work causes to other property. It does not cover the cost to fix your own work.

Back to that condensate line example. Your insurance pays for the ruined ceiling tiles, destroyed computers, and soaked carpet in the office below. But replacing the drain line and reinstalling it correctly? That is on you.

As Procore's contractor insurance guide explains, the coverage protects the property surrounding your work - but not the work you performed or the product you installed. A plumber's completed operations pays for water-damaged hardwood floors, but not the pipe fitting that failed.

Other exclusions to know:

• Damage to your own product - if the HVAC unit itself fails, your policy does not replace the unit
• Expected or intended damage - if you knew the work was defective and left anyway, that is not an "occurrence"
• Recall costs - if a component you installed gets recalled, the cost of removing and replacing it is not covered
• Impaired property - if your work makes a building unusable but does not physically damage it, that may be excluded

How Long Does Completed Operations Exposure Last?

Here is where it gets serious. Your completed operations exposure does not end when the warranty expires. It lasts as long as someone can legally bring a claim against you.

Every state has two time limits that matter:

• Statute of limitations - how long after discovering a defect a person can file a lawsuit (typically 2 to 6 years)
• Statute of repose - the absolute outer limit after project completion, regardless of when the defect is discovered (typically 4 to 10 years, and unlimited in New York)

That means a system you installed five years ago could still generate a claim today. If you dropped your completed operations coverage or let your policy lapse, you have no protection for that old work.

This is why you should never let your CGL lapse, even during slow seasons. And if you are thinking about retiring or closing your business, talk to your agent about "tail coverage" - an extended reporting period that keeps completed operations active after your last policy expires.

How to Make Sure You Actually Have This Coverage

Here is the good news: most standard CGL policies include products-completed operations automatically. It is built into the ISO CGL coverage form as a package. Unless your policy has been specifically endorsed to remove it, you should have it.

The bad news: some carriers will add endorsement CG 21 04, which excludes products-completed operations entirely. This sometimes happens when contractors shop purely on price and the carrier strips coverage to hit a lower premium.

Here is what to check on your policy:

1. Look at your declarations page. There should be a separate premium charge for products-completed operations. If the premium is $0 or the line is missing, you may not have coverage.
2. Check for endorsement CG 21 04. If this is attached to your policy, your completed operations coverage has been excluded.
3. Review your aggregate limits. Products-completed operations has its own aggregate limit, separate from your general aggregate. Standard is $2 million, but high-volume commercial HVAC contractors may need more.
4. Confirm additional insured endorsements. General contractors often require you to name them as additional insured on your completed operations coverage using endorsement CG 20 37. If you cannot provide this, you may lose the job.

Average general liability premiums for HVAC contractors run about $78 per month with $1 million per occurrence and $2 million aggregate limits. That includes completed operations. Compared to a single $85,000 water damage claim, the math is not complicated.

The Documentation That Protects You When a Claim Hits

When a completed operations claim comes in, documentation is your best defense. The HVACi Annual Claims Report found that nearly 20% of HVAC systems assessed during claims were not actually damaged. And over 50% of reported causes of loss were recategorized after independent assessment. Good records help you prove what actually happened.

Keep these for every job:

• Before-and-after photos of every installation
• Commissioning reports with system test readings
• Signed inspection checklists
• Refrigerant charge logs (EPA requires three-year retention minimum)
• Client sign-off on completed work
• Warranty documentation
• Any change orders or deviation from original scope

If a claim hits two years from now, you want a file that tells the complete story of what you installed, how you tested it, and what the client accepted.

FAQ: Completed Operations for HVAC Contractors

Is completed operations coverage the same as general liability?

No. Completed operations is a component of your general liability policy, not a separate policy. Your CGL covers two hazards: premises/operations (while you are on the job) and products-completed operations (after the work is done). They work together under the same policy but protect you in different timeframes. Most standard CGL policies include both automatically.

Does completed operations cover the cost to redo my faulty work?

No. Completed operations covers the damage your faulty work causes to other property - the flooded office, the ruined carpet, the destroyed electronics. It does not pay to rip out and reinstall the condensate line or replace the unit that failed. The cost to correct your own work is your responsibility as the contractor.

How long can a completed operations claim be filed after I finish the job?

It depends on your state. Statutes of repose for construction defects range from 4 years to 10 years after project completion in most states. New York has no statute of repose, meaning claims can theoretically be filed indefinitely. Your CGL policy only covers claims made during the policy period, so maintaining continuous coverage is critical.

What happens if I cancel my policy and a claim comes in from old work?

If you have an occurrence-based CGL policy (which is standard for contractors), the policy that was in force when the damage occurred should respond - even if you have since canceled. However, if the damage happens after cancellation and there is no active policy, you have no coverage. This is why contractors should discuss "tail coverage" or extended reporting periods with their agent before dropping coverage.

Do general contractors require HVAC subs to carry completed operations?

Yes, almost always. Most GCs require subcontractors to carry completed operations coverage and to name the GC as an additional insured using ISO endorsement CG 20 37. This endorsement extends your completed operations protection to the GC for claims arising from your work after the project is finished. If you cannot provide this endorsement, many GCs will not let you on the job.

The Bottom Line for HVAC Contractors

The work you do lives inside buildings for 15 to 20 years. Condensate lines, refrigerant circuits, gas connections, electrical wiring, control systems - all of it runs quietly until it does not. When something fails after you leave the job, completed operations is the coverage that stands between your business and a claim that could shut you down.

Do not assume you have it. Pull your policy. Check for exclusions. Make sure your limits match the size of work you are doing. And keep documentation on every job so you can defend yourself when a claim hits years down the road.

If you are not sure where you stand, or if your current agent has never walked you through your completed operations exposure, talk to someone who understands contractor insurance from the inside.

Talk to the Grit Team

Grit Insurance Group works with HVAC contractors across the country. We review your full insurance program - general liability, completed operations limits, additional insured endorsements, and every coverage gap that puts your business at risk. We have been in the contractor insurance business for over 30 years, and we speak your language.

Call us directly: (801) 505-5500

Take the Bond Scorecard: gritinsurance.com/bonds-surety/contractor-bond-readiness-review/contractor-bond-scorecard/

Whether you need bonding, a full commercial insurance review, or just want someone to look at your completed operations limits - we pick up the phone. No bots. No runaround. Straight answers from people who know the business.

Related reading:

• Contractor Insurance by Trade
• Surety Bonds and Contractor Bonding