15 Things HVAC Technicians Don't Want You to Know About Aluminum Foil — #7 Saves $900

Get The 30-Year HVAC Bible — Make Your Heating And Cooling System Last Decades Longer → https://liibro.com/l/hvac/john-the-hvac-guy Aluminum foil plays a surprising number of roles in your HVAC system — from the fins on your outdoor condenser coil to the tape on your ductwork, the jacket on flex duct, and the radiant barrier stapled in your attic. This video walks through fifteen things about aluminum foil and HVAC that most homeowners never learn, starting with why the famous gray tape that has "duct" in its name is actually the worst thing you can put on a duct — a fact confirmed by Lawrence Berkeley National Laboratory testing. You'll learn how to read the UL 181 listings printed on proper foil tape, why closing off registers with foil raises your energy bill instead of lowering it, and how duct air leakage can cost the average household hundreds of dollars every year according to Energy Star data. The video also covers which coil cleaners dissolve aluminum fins, why modern evaporator coils have shifted away from copper, the serious carbon monoxide risk of taping a gas furnace flue, dryer duct fire hazards, and why foil-faced bubble wrap insulation delivers around R-1 on its own despite labels showing far higher values. #hvac #homeimprovement #energysavings #ductwork #insulation #airconditioning #heating #diy #homerepair #appliances