Lifetime Limited Heat Exchanger Warranty to original owner
Manufacturer’s Limited Warranty - 5-Year Internal Parts
XV80 - 80% Annual Fuel Utilization Efficiency (AFUE)
Manufacturer’s Limited Warranty - 20-Year heat exchanger
Manufacturer’s Limited Warranty - 5-Year internal parts
XL80 - 80% Annual Fuel Utilization Efficiency (AFUE)
XR80 up to 80% Annual Fuel Utilization Efficiency (AFUE)