I find flexable aluminum ducting some what flimsy.
4 inch rigid duct insulation.
Speedi products ex afp 424 4 inch x 2 foot semi rigid push fit duct silver.
Think i would put it on with the kraft paper facing out and secure it with duct tape.
If you can use a thicker insulation do cover pipe than the 1 quot.
The duct has r6 insulation which contains 33 more insulation than the standard r4 2 product.
The master flow 4 in.
Johns manville 800 series spin glas equipment and external duct insulation provides a broad range of solutions to meet your unique application needs the breadth and depth of our product availability includes plain fsk ap asj or ultra poly top faced board where the facing acts as a vapor retarder.
Insulated flexible duct r6 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.
6 inch 16ft flexible duct insulation aluminum clothing dryer vent hose gray pvc lightproof exhaust hose for fan filter and grow tent 2 clamps include 4 4 out of 5 stars 743 22 88 22.
Get it as soon as sat sep 26.
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3 9 out of 5 stars 31.
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Owens corning type 703 type 705 700 series fiberglas insulation boards are made of inorganic glass fibers with a thermosetting resin binder and formed into semi rigid or rigid rectangular boards.
I would be concerned about its ability to support the weight of insulation over any distance.
The inside isn t as smooth as straight metal pipe i only use flex duct for air take off s from a trunk duct line to a baffle or air box for a register.
For 4 bathroom vents i like to use schedule 30 pvc sewer pipe and fittings the light weight stuff.
Type 703 and 705 are available with factory applied frk or poly encapsulated asj max facings.
Flex duct comes insulated in a similar fashion but flex duct is more restrictive to airflow.
This additional insulation provides greater thermal efficiency to save energy.