Latest Discussions : HVAC

slick999

04:40PM | 09/16/06
Member Since: 09/15/06
1 lifetime posts
Am remodeling a kitchen whose "false" ceiling contains 4 cold air returns (flex duct: 2 are 9" and 2 are 10"). Location is tucson, az so cooling in summer is more critical than heating in winter.

I want to move these cold air returns and have already moved one of them. The old return was 9" flex duct connected to ductwork between 2 studs. The opening size between the studs was 2 1/2 inches by 12 inches. The register was 12 x 8 and was 3 inches off the floor. I moved this air return to the far side of the room and 8 feet off the floor. The opening size in the new location is 12 x 8 connected directly to the 9" flex duct. Their is a noticeable difference between the suction in the new location and the suction there used to be in the old location. (new location has more suction). My question is this: It seems like my new location is moving more air than old location. Is this a function of no longer restricting the size down to 2 1/2 inches by 12 between the studs?

Also, the furnace sits on top of the cold air return "box". How close in linear feet to this cold air return "box" can I install a cold air return register?




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