#1
Old 10-26-2011, 04:39 PM
Guest
Join Date: Nov 2003
Location: Oak Park, IL
Posts: 38
AC Vent Clearance?

Hi-
I have a question about the amount of clearance need for an AC intake vent. We live in an old home that has been (retro-)fitted with a dual-zone AC system. It's a SpacePak (or similar) with one air-handler in the crawl-space under the family room and the other in the attic. The problem lies with the intake for the lower-level system.

As I said, the air-handler is located under the family room. The intake vent is located in the floor, and it's location makes furniture placement very difficult. Would it be possible to place a sofa OVER that vent if it had longer legs? Obviously I know that there needs to be sufficient circulation for the unit to operate properly, but I do not know if 3 or 4 inches of clearance would allow the proper circulation.

Thanks for the help,
-A
#2
Old 10-27-2011, 02:08 PM
Member
Join Date: Aug 1999
Location: Great White North
Posts: 4,123
On a forced air system, you should not obstruct a return vent in any manner that would constrict its regular air flow. If you place furniture over or in front on a return, the total air gap around/under/behind etc. must be equal to or greater than the total area of the vent.

For example, if your return vent is 6" x 8" you must have at least 48 square inches of clearance for air to flow around your furniture.
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 10:48 PM.

Send questions for Cecil Adams to: [email protected]

Send comments about this website to:

Terms of Use / Privacy Policy

Advertise on the Straight Dope!
(Your direct line to thousands of the smartest, hippest people on the planet, plus a few total dipsticks.)

Copyright 2018 STM Reader, LLC.

Copyright © 2017
Best Topics: dope bible verses overhead toilet reroof cost dishwater blonde drano tub sink height lab ethanol globetrotters cager cheapest building method ace casting profilext answers shower towel bars yummy in italian what mountain is the paramount logo guinness 06 13 glass have you been bonded definition what is the female version of junior how much does a sheet of sheetrock weight does alcohol increase serotonin how much semen is needed to get pregnant what does ? mean under the ocean song how to find electrical wire underground swan decoy for geese where is butane at walmart