"stretch" wrote in message
ups.com...
Use the foil /mylar covered flex to replace the old flex. Use at least
R-6 flex, R-8 If available. Flex duct should be sized at least 1 inch
bigger in diameter than sheet metal to pass the same amount of air.

Seal ALL connections with mastic and fiberglass mesh tape, NOT duct
tape.

Stretch


This is Turtle

Stretch , is that 1" Bigger flex duct than sheet metal duct sizes. Is this a
ruff estimate or close to facts ? Not a loaded Question here !

TURTLE

Shut Up Paul !