A well-insulated duct system is a key to saving energy, making the home more comfortable and protecting the environment. Insulating your ducts may seem like an expensive project but can be paid for in just a few years by lower energy costs, reduced load on the HVAC equipment and extending its life.
Prevents air loss and maintains consistent temperatures.
Uninsulated ducts lose heated or cooled air through leaks, increasing the workload on your heating and cooling systems, resulting in higher utility bills. Adding insulation duct minimizes energy losses and keeps conditioned air in the rooms you want it in, lowering your energy bills.
Reduces condensation and prevents mold, mildew, fungus and other microbes.
Moisture in uninsulated ducts can cause mold and mildew that can then spread to the indoor air, causing allergy symptoms and other health problems. Insulation helps to keep ducts dry, which helps prevent condensation.
Duct insulation also acts as a sound barrier to minimize noise. Noises from rattling, buzzing or whistling metal ductwork can be a nuisance and interrupt your comfort. In addition, insulated ducts can significantly reduce noise transfer between rooms.
There are many types of duct insulation available, and the choice depends on climate and other factors, such as whether a duct passes through an unconditioned space or near external walls. The recommended level of insulation for your ductwork is given in terms of an R-value, with the higher R-values being suitable for colder climates. Fiberglass, polyethylene and rockwool are all popular choices. Fiberglass is inexpensive and easy to install, while polyethylene and rockwool require more professional expertise.