Is this even possible, to rate one of these units? Some of the units produced are insulated with some very expensive foam and are extremely labor intensive, to the tune of over $10,000.00 to the buyer on a 40' unit.
Combustion Appliance Zone Testing (CAZ) Made Easy (March 24, 2016)
-Adapting to the new BPI standard
-RESNET testing requirements
-NFPA testing requirements
-Best practices for best results