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Navien NHB-55 Condensing Gas Heating Boiler

Navien NHB-55 Condensing Gas Heating Boiler NHB-55 Super condensing efficiency Dual stainless steel heat exchangers SCH40, 2” PVC venting up to 60’ ½” Gas pipe up to 24’ TDR up to 7:1 integrated controls Navien NHB-55…