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gasbie 06-19-2011 11:11 AM

Help with return air duct
 
I really need some serious help. I live in a townhouse. the basement ceiling is still opened, so I decided to inspected all the ducts that branches off the main supply. I realized that the contractor who build in the house did not install the duct properly. So right now, am going through some major duct work. I have a return air duct on the middle floor and in the hall way on the upper floor. My upper floor gets too cold during winter and too hot during summer. My current unit is 2tons and am in the process of upgrading it to 2.5tons or 3tons. Just to let y'all know, the living area of my town house in 1220sf. Not that big. Also, each room on the upper floor has two supplies going into them. That should be enough, rite, once I upgrade to a bigger unit? Okay, my major concern is the return air duct. I have on in the hall way upstairs. Can I use a 'Tee' duct on the existing return duct (located in the hallway), the run about 6ft duct work of return air to each room upstairs. I have access to my attic. So, if I split the return air to deliver to the two rooms and hallway, will that have an impact on the system. Also, how do I determine the size of the return duct for the rooms assuming this is possible.

cascadehvac 06-20-2011 11:09 AM

you dont need returns in every room. ur prolly got the right size unit already too. 2 tons should b fine for 1200 sq/ft. ur overthinking it

gasbie 06-20-2011 01:08 PM

I think am overthinking too. My head is heating up. lol. Thanks

biggles 06-20-2011 06:08 PM

you have returns on the top and middle hallways and the unit location has return to it? i would focus on sealing that supply ducts before insulating them with thick duct mastic sealer...then wrap as you go.i would cheat the first floor to get the air to rise up into that top floor and then tweek open the first floor as desires...where is the stat located what floor...verift you have HI SPEED during cooling and LO or Med Lo during heating...check the squirrelks on the fan section that they are clean and not dusted...dirty

beenthere 06-20-2011 07:54 PM

Do your own load calc and see what size you need. http://hvaccomputer.com/talkref.asp


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