Using Flexible Duct For Heating

Flexible hvac ductwork this type of ductwork is usually tube shaped and is made from a wire coil covered in a bendablebut durable plastic. Find flexible duct at lowe s today. Using this kind of ducting is best in tricky spaces where rigid ducts are not just possible to install.

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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.

Using flexible duct for heating.

While those that sell flexible ductwork may have you believe otherwise it does not allow as much airflow as a similar sized metal duct. Manufacturers then cover the tube in fiberglass insulation. The duct has r8 insulation which contains 50 more insulation than the standard r4 2 product. Since it is so flexible it is also easy to obstruct the airflow even more.

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. The master flow 6 in. Insulated flexible duct r8 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.

Ideally ducts shouldn t sag more than inch per foot between supports and maximum sag should not exceed 2 inches 4e.

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