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Post subject:Question?air velocity on supply outlet registers (Grilles)
 Posted: Apr 24, 2008 - 04:02 AM #7527
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Joined: Apr 17, 2008
Posts: 5
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I'm curios about the air velocity for residential use recomended for the supply outlet registers on a typical bedroom or living room. Is there any kind of rule to follow, you know, if for example you need 500 cfm on a room, usin a ductculator yuo obtain at 1"SP you need 12X8 duct and at that mark the air velocity for 500 cfm marks 850 FPM, would that be correct or is necesary blow the duct size at the register to obtain diferent air velocity.
Also I'm curios about the velocity needed when using swamp cooler which handle bigger air volumes to feed areas. In other words I need to know what to do in both cases, normal ref. a/c and swamp cooler a/c used in dry areas like west Tx. |
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Post subject:RE: Question?air velocity on supply outlet registers (Grilles)
Posted: Apr 24, 2008 - 05:43 PM #7529
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Power User
Joined: Nov 01, 2006
Posts: 91
Location: McEwen,Tn.
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cacle70........I use .08 for s/a and .06 for r/a. Is this install clg,floor or wall?
You need to find a Hart&Cooley catalog.It's got the engineering data in it
for sizing your registers..We use for 7" pipe 140cfm @.08 with a 6x10 grille.
That'll give you about 600 fpm @ the grille..If it's a wall grille you have to consider the throw.FPM would be greater..Don't know about swamp coolers.
I'm sure the manufacturer has his recomendations..
bordontn2 |
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