Using Flexible Duct For Heating
Using this kind of ducting is best in tricky spaces where rigid ducts are not just possible to install.
Using flexible duct for heating. The master flow 6 in. Find flexible duct at lowe s today. The duct has r8 insulation which contains 50 more insulation than the standard r4 2 product. When you want to heat and cool the house efficiently you need to allow as much airflow as possible through the ducts.
This additional insulation provides greater thermal efficiency to save energy. Manufacturers then cover the tube in fiberglass insulation. Ideally ducts shouldn t sag more than inch per foot between supports and maximum sag should not exceed 2 inches 4e. Flexible hvac ductwork this type of ductwork is usually tube shaped and is made from a wire coil covered in a bendablebut durable plastic.
A good rule of thumb is to provide a duct support no less than every 4 feet and more frequently when using large diameter flexible duct 4c even when ducts are partially supported by framing members 4d.