This Standard,hereinater. rferred to asincluding furnaes for diret,frnaces, for nalton, in rsidental,l,comrcal,. and nsusrial sruturest vent, rcreatonalvehicle, outdoor,These furmaces may iindude.coin unin AI unt ae eobeoand 1manfactured (mobil homes.and materials.constructedentirely of new,unused parts
