- Advanced design long life cast aluminum heat exchanger> - 4:1 modulation - All boilers ready for Floor standing or wall mount - Natural or L-P. gas - PVC/CPVC vent pip up to 100 ft. equivalent length - All connections on top - Easy access terminal strip for wiring - Quiet operation - Low NOx friendly to the environment - Ideal for radiant, baseboard, DHW or mixed applications - Brazed plate heat exchanger mounted neatly in boiler cabinet - 15 Year Limited Warranty with 5 year. parts and labor warranty