GAMA and I=B=R Certification
GAMA Certification Program
Residential Furnaces
Scope: This program covers all gas- and oil-fired central furnaces that use single-phase electric current or DC and that have a heat input rate of less than 225,000 Btu/hr. Click on the links to retrieve printable AHRI Directory PDF files.
Find Residential Gas and Oil Furnaces in the AHRI Directory.
This program independently verifies:
Efficiency: Annual Fuel Utilization Efficiency (AFUE), %
Output Heating Capacity, Btu/hour