Assertion: gas furnace | /r/HasAspect | afue
Facets:
Source sentences:
text: ENERGY STAR for Homes (Version 3, Rev 08) requires furnaces in IECC Climate Zones 4 through 8 to be direct vent or mechanically drafted and requires that gas furnaces have an AFUE > 90% and that oil furnaces have an AFUE of > 85% and be ENERGY STAR-certified.