You benefit from a lifetime warranty onthe core, and a 5 year warranty on allother components. So you can breathe easy. SafetyConsiderations for HRV 1. Read entire manual before attempting to install the unit. 2. Always determine how the operation of the unit will interact with Combustion Appliances (i.e. Gasfurnace, Wood stoves, Oil furnace…) 3. Never install a unit in situations where normal operation, lack of operation or partial failure may result inbackdrafting or improper functioning of Co