Vet an HVAC Contractor on Long Island: Insurance Check

Ask the contractor to have their insurance broker email you a Certificate of Insurance (COI) directly. The COI should:

• Be issued by the insurance company or broker (Acord 25 form), not typed up by the contractor
• List you (the homeowner) and your property address as Certificate Holder
• Show at least $1,000,000 per occurrence and $2,000,000 aggregate
• Show effective dates that cover your scheduled install

A contractor-provided PDF that didn't come from the insurer is easy to fake. Brokers can typically issue a COI to a property owner quickly and at no charge.

If a contractor's technician is injured on your property and the contractor has no workers' comp, you can be held financially liable. Verify two ways:

1. Request the workers' comp COI from the contractor's broker, same as general liability.
2. Independently confirm at the NY Workers' Compensation Board: wcb.ny.gov has a free coverage lookup tool. Enter the business name and confirm active coverage.

Sole proprietors with no employees may be exempt from workers' comp — but they should still carry general liability, and any sub-contractor they bring on must be covered.

Federal law (Clean Air Act Section 608) requires EPA certification for anyone who buys, recovers, or handles refrigerant. Every working HVAC technician needs this — it's the legal minimum, not a premium credential.

There's no public lookup directory for EPA 608 (it's tracked by certifying organizations), so ask the contractor to provide a copy of the certification card for each technician on your job. Real cards show the technician's name, certification type (Type I, II, III, or Universal), and issuing organization.

Confirm the business actually exists as a registered entity:

• Where: NY Department of State Entity Search
• What to confirm: Active status, formation date, and that the legal name matches the name on your estimate and contract

A business with no NY entity registration is hard to hold accountable if something goes wrong. The formation date also gives useful context against marketing claims about how long they've been in business.

Insurance and credentials tell you who is on your property. The paperwork tells you what you're getting. Before you sign, make sure you have:

• An itemized written scope with outdoor unit, indoor coil, and furnace or air handler model numbers, tonnage, and efficiency ratings.
• Written warranty terms for both labor and parts, in a document you can keep.
• Manufacturer product registration confirmed in writing. Manufacturers require installation to their specifications and registration of the product; ask who registers the equipment and get confirmation after install.
• Payment terms in writing — deposit amount, balance due date, and what triggers final payment.

Nassau County Office of Consumer Affairs (nassaucountyny.gov) and Suffolk County Department of Consumer Affairs (suffolkcountyny.gov) oversee home improvement licensing in their counties, and homeowners can ask any contractor about it. Both offices also take consumer complaints if a job goes wrong.

The downside scenarios are real and expensive:

• Worker injury liability. No workers' comp can pull your homeowners' insurance into the claim.
• Uninsured property damage. Without general liability, damage to your home during the install comes out of your pocket or a lawsuit.
• Warranty gaps. Manufacturer warranties depend on installation to the manufacturer's specifications and on product registration. If nobody registers the equipment, you may find out only when a compressor fails years later.
• No paper trail. With no written contract, itemized scope, or insurance certificate, a dispute becomes your word against theirs, and small claims court is your main path.

If checking insurance and credentials on three contractors sounds like a chore, our Long Island HVAC comparison guide walks through what to verify and how to line up three written proposals on scope, equipment, price, and warranty terms.

Open the Long Island HVAC contractor comparison guide →