0

I had sweating ducts.i pulled the drywall down and wrapped all the ductwork.the main stack, two 4 inch ducts and two 6 inch ducts in my dining room and into the kitchen. I got to one spot where the two 6 inch ducts go through the main truss in the center of the house. The builder put a third truss butt up against the main support truss but they did not line up the openings. They squished the two 6 inch ducts down to about 2 inches to get through the opening. I don’t have anywhere I can rerun this. Can I put put a Y pipe on the two 6 inch ducts to reduce it to one 6 inch pipe then put another Y pipe on the other side to go back to 2 ducts?

0

You can...but do you need to?

If you have a square duct, 4x4", it has a cross section of 16 square inches.

If you squish it to 2x8", it still has a cross section of 16 square inches.

I think it's good the way it is and you aren't losing any airflow.

2
  • Thank you for answering. It makes sense, the only problem is because the builder squished two 6 inch ducts through the opening. It leaves no room to wrap insulation around it. The wood and drywall are wet from the sweating ducts. Everywhere else I wrapped seems to have stopped the sweating. If I don’t wrap this area, it will continue to drip. – Jim Sep 9 '20 at 23:16
  • I understand. Maybe spray foam? – Steve Wellens Sep 10 '20 at 4:42

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.