When the combustion air duct is connected directly to the return plenum for a furnace, the blower fan on the furnace pulls outdoor air in to the return plenum. To supply this air to the furnace room, ...

HVAC contractors can easily add duct cleaning services to their company by following a few tried and true steps, as explained by cleaning and restoration contractor David Hart. So you’re an HVAC ...

The National Air Duct Cleaners Association (NADCA); also known as the HVAC Inspection, Cleaning, and Restoration Association; today announces the publication of a white paper on methods of inspecting ...