Rinnai has introduced four new hydronic furnace models, which work in conjunction with the Rinnai tankless water heating system to efficiently heat the entire home, and features Electronically Commutated Motor technology that operates up to 48% more efficiently than traditional PSC (permanent split capacitor) motors. The units use hot water generated by Rinnai's tankless water heating system to heat the air, which is then distributed throughout the home via the unit's blower and the home's existing ductwork. www.rinnai.us.