Standard heat supply & ventilation for residential rooms

[BayPointArchitect]

Although I have designed preliminary ductwork layouts for commercial offices using a general rule of 1 cfm per square foot, this is my first time illustrating heat supply ducts for a residence. Obviously, there is the option of Manual "D" and "J" calculations. Hmmm... I do not think I will ever use anything more sophisticated than a ductilator.

Is there another "rule of thumb" that is commonly applied to residential areas such as bedrooms and living rooms?

My main effort is to provide adequate (1) chase space and (2) spacing between floor joists and (3) headroom height in the basement. Therefore the plan is "preliminary" and it is expected that the heating contractor will apply his experience and expertise - - - after we find out who the heating contractor will be.

Again, I am wanting to know if 1 CFM per square foot of floor area is enough or too much for residential design.

Thanks

Registered Architect

ICC Certified Building Plans Examiner

 

[Paul Sweet]

Standard heat supply & ventilation for residential rooms

Somewhere between 1/2 and 1 CFM per SF should be close enough for sizing chases.

Just make sure you size it for flex duct!

baypoint

check this:

http://www.wisdomandassociates.com/education/bpi/calculators/ASHRAE%2062.2-2004%20Ventilation%20Calculator.htm

 

[Mule]

I might have messed this whole thread up I tried moving it to the Residential Mechanical Forum.... Only moved one, tried again to make it correct, still messed up, tried to fix it again and I don't know where things are now! :banghd

So I hope you guys got what you needed out of this...

Sorry! ops

 

[TimNY]

you deleted my post! good thing I don't have much to say...

my only suggestion was to size it for flex duct.. the amount of space required for 1 cfm through rigid metal is hardly the same as flex..

I'm increasingly seeing flex duct being used where rigid once was (and probably should be) used.

 

[Paul Sweet]

Tim, I think your post got merged into mine.

 

[Mule]

Boy oh boy! I really messed this one up didn't I!!! :evil: Sorry fellers......:banghd

 

[north star]

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And you were doing so good Wayne!....Gotta issue some demerits to you!



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