Dear Kory: Correct. A reflective / radiant barrier provides some insulation only if you create / build a sealed air gap around the water heater, with the reflective side facing inward. This air gap must be well sealed, or heated air will simply circulate up and out. In addition, reflective / radiant barriers are not as effective as standard fiberglass-based insulation 'wraps', which are also easier to install. For example, Home Depot sells the Frost King insulation blanket which provides R-10 -- simply wrap it around your water heater and tape the seams with foil HVAC duct tape. See: Frost King Model # SP57/11C, Home Depot Internet #100139225, UPC Code # 077578023946 Store SKU #417920 I hope this is helpful. Mark
Dear RenoGirl: Reflective / radiant barrier products like Reach provide almost no insulation by themselves -- just R-1. The claims on the package are based on a sealed air gap that you must create / build when you install it. You cannot simply 'wrap'' your water heater with Reach (or similar products) and achieve meaningful results -- except a waste of money and time. Standard fiberglass-based insulation blankets are much more effective and easy to install. See: Frost King Model # SP57/11C, Home Depot Internet #100139225, Store SKU #417920, which delivers R-10 insulation. A tip for installation: Carefully seal all of the seams with foil HVAC tape, to block air leaks -- not silver fabric "duck" tape. Home Depot sells Nashua foil tape. Also make sure you do not block any vents on the top or bottom. I hope this is helpful, Mark
No, this product is for use on water heaters.
Dear Scuba00: Great question! When I saw this 'reflective insulation' kit, I wondered how they could claim any R value. Reflective products require you to install / create a sealed air pocket on one side. This air gap provides almost all of the claimed R value; the reflective plastic provides almost no R value. So... you could not simply wrap a water heater with a reflective product and achieve good insulation. Home Depot sells two insulation products for water heaters that provide reliable R11 insulation: MD Building Products Model # 04689 Internet # 205129967 and Model # SP57/11C Home Depot Internet # 100139225 Store SKU # 417920. A tip: use foil HVAC tape to attach these products and seal the seams -- not silver fabric "duct" tape. See: Nashua Tape Model # 1207792 Home Depot Internet # 100030120 Store SKU # 915245 I hope this is helpful. Mark
My heater is a 50 gallon electric heater and the 40 gallon kit worked fine. Since heaters come in all sizes, measure you tank. The 40 gallon kit may fit. I covered the top and even had a piece left over.