View Full Version : Refreshing memory

09-01-2003, 11:15 AM
Can anyone tell me what the cfm value is for a room per square metre or where i can access a chart etc? I remember designing at college using CIBSE guidelines but that was a long time ago.
Anyone refresh me??

21-01-2003, 05:59 AM
Well Reg-
I'm sure the standards in Kansas must be different but here's what we do. For most commercial applications, we're looking for a minumum of 1.25 cfm per square foot (almost 12 cfm per square meter). In residential use, we'd like to get at least half that amount:D
If I've answered the wrong question, let me know.

06-02-2003, 11:29 PM
You need someplace between 300 and 400 CFM per ton, depending on coil size, latent load, etc. Do a load size, convert to tons and supply the appropriate air for the load in that room.

07-02-2003, 01:03 AM
.......... DO A LOAD CALC..................... for your application... you're not designing on "rule of thumb" are you?

the factor differs on application..... "Don't get me started........"