HVAC APPLICATIONS: Our Low-E Insulation is quickly becoming the insulation of choice for many quality HVAC contractors. Low-E HVAC is constructed of polyethylene foam faced on both sides with aluminum. Used mainly as a duct insulation this product has many benefits for both the installer and the homeowner versus typical duct insulations. Because Low-E is faced on both sides with pure aluminum it has an extremely low e-value(.03) which stops up to 97% of radiant heat transfer. Low-E absorbs absolutely no moisture, so if condensation would occur the insulation will not lose its performance value nor will it mildew or deteriorate. It's totally non-toxic and there are no adhesives used in its construction, resulting in a clean, fiber free, hypo-allergenic duct wrap. Best of all, for the installer it is lightweight, cuts with a razor knife, and there's NO ITCH! Give it a try and find out for yourself. See why Low-E HVAC Insulation is "the most versatile HVAC insulation on the market today"