This additional insulation provides greater thermal efficiency to save energy.
Using flexible duct for heating.
The master flow 6 in.
Manufacturers then cover the tube in fiberglass insulation.
While those that sell flexible ductwork may have you believe otherwise it does not allow as much airflow as a similar sized metal duct.
Insulated flexible duct r8 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.
When you want to heat and cool the house efficiently you need to allow as much airflow as possible through the ducts.
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.
Using this kind of ducting is best in tricky spaces where rigid ducts are not just possible to install.
Find flexible duct at lowe s today.