Hi,
My existing heating system has a 9 " duct which the heat comes out of. I cannot find any 9" flexible duct to use on my addition. I tried to special order it, but all they carry is 8" and 10". Can I use 10" flexible duct on the 9" duct coming out of the heater, or is there a better way to do it?? Any help would be appreciated.
pb4sc
2006-09-28 12:00:42 · 8 answers · asked by PB4SC 2 in Home & Garden ➔ Maintenance & Repairs
Yes you can....with only an inch difference you will not notice any difference....Make a small slice ( a couple of inches ) on the flex and when you put the 10 inch flex on the 9 inch duct make the fitting tight to the metal...the slice will help you do this...you can use plastic tie strips but I recommend metal tape...( found in the HVAC area of Home Depot or Lowes....) Good Luck
2006-09-28 12:32:44 · answer #1 · answered by ? 3 · 1⤊ 0⤋
I had the same problem in my first home. I don't know why or how they can make duct work that doesn't fit the duct.
I used 10 inch to replace deteriorated. The only problem I had was at necking down the 10" flexible to fit the 9" duct. I slit the flexible duct and overlapped the excess at the joint. Using plenty of duct tape I was able to get a good seal.
As for the performance of the AC system, there was no adverse affect.
2006-09-28 12:36:47 · answer #2 · answered by richard Alvarado 4 · 1⤊ 0⤋
10 Inch Flex Duct
2016-11-17 01:52:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋
This Site Might Help You.
RE:
Ok to use 10" flexible duct on a 9" heating duct???
Hi,
My existing heating system has a 9 " duct which the heat comes out of. I cannot find any 9" flexible duct to use on my addition. I tried to special order it, but all they carry is 8" and 10". Can I use 10" flexible duct on the 9" duct coming out of the...
2015-08-13 13:56:29 · answer #4 · answered by ? 1 · 0⤊ 0⤋
Yes you can use 10" on the 9" duct. You have to get a starting collar to attach to the duct so you can hook up the flex. Just oval the collar to fit in the 9" duct, mark it out and cut it. No fuss.
2006-09-28 12:33:24 · answer #5 · answered by Obsean 5 · 2⤊ 0⤋
IF YOU ARE ADDING ON TO THE DUCT AND ARE MORE THAN 25' FORM THE FURNACE THAN USE 8" NOT 10" THIS WILL KEEP THE STATIC PRESSURE UP ON THE LINE.
IF YOU ARE REPLACING THE DUCT OR LESS THAN 25' THEN USE THE 10"
2006-09-29 09:51:56 · answer #6 · answered by wesmwl 2 · 0⤊ 0⤋
Like the other answers, Yes you can, But don't tape the duct. Use Nylon straps, Like the Little zip straps but these are much stronger and are made to attach the flex-duct to the collars on the plenum and the register
2006-09-28 13:19:41 · answer #7 · answered by myothernewname 6 · 1⤊ 0⤋
There are isolating materials that can be used to connect the sections of ducts that limit the transmission of sounds, but no way to totally block the sounds.
2016-03-22 15:03:22 · answer #8 · answered by Sylvia 4 · 0⤊ 0⤋
--->> Tips---> https://trimurl.im/f89/ok-to-use-10-quot-flexible-duct-on-a-9-quot-heating-duct
2015-08-04 13:18:57 · answer #9 · answered by Anonymous · 0⤊ 0⤋
of course
2006-09-30 05:25:11 · answer #10 · answered by Anonymous · 1⤊ 0⤋