A workmanship warranty is your own guarantee that the installation labor is defect-free — the refrigerant and condensate connections you sealed, the electrical you wired, and the way the system was set up. A manufacturer warranty covers the equipment's parts (compressor, heat exchanger, coil) and is issued by the brand, not the installer. This certificate states your labor guarantee and passes through the manufacturer's parts coverage so the customer sees both in one place.

Most contractors guarantee their workmanship for about one year, while the manufacturer parts warranty on installed equipment often runs 10 years. Both clocks start on the completion or installation date, not the purchase date — so this certificate records that date and calculates each expiry from it.

Skipping seasonal maintenance, running the system with a clogged filter, DIY or third-party repairs, and damage from storms, floods, lightning, or power surges all void HVAC workmanship coverage. Failing to register the equipment within the manufacturer's window — often 60 days — can also cut a 10-year parts warranty back to the base term.

Usually not — a contractor workmanship warranty is written for the original customer and this template is non-transferable by default, voiding if the property changes hands. Some manufacturer parts warranties allow a one-time transfer to a new owner within a set window, but that is separate from your labor guarantee. Edit the terms if you choose to offer transfer.

The customer contacts you in writing — using the phone or email on the certificate — within 30 days of noticing a defect, and includes the certificate number, the original invoice, and photos. You must be given a reasonable opportunity to inspect and remedy the issue before anyone else is hired. The claim process field spells this out so expectations are clear up front.