10 Year Extended Limited Warranty for Air-Cooled Product - Evolution controller models. Warranty covers 10 years parts and labor*. Can be purchased post 12 months of end-user registration/ activation date, which will remain as the start date. Unit must be registered and end-user proof of purchase must be available upon request. Available on Generac®, Honeywell® and Centurion® brand products. Air-cooled automatic standby 2014 models and newer. Available on Guardian®.  Not available on PowerPact, CorePower, EcoGen, Synergy, or internationally.