Do you think the air loss will be minimal in the following situationUnderground duct with some separation at the joints, trenched and encased in pea gravel but surrounded with clay soil. There is…Continue
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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