HomeMy WebLinkAboutVentilation Calcs - 11/21/2002 NOV -21 - 02 THU 02:48 PM BREWER HEATING FAX:19207486520 PAGE 1
FAX COVER SHEET
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Brewer heating Inc. t n
N8804 N. Douglas St.
Ripon, WI 54971 y5
Phone:(920) 748 -6494 Fax:(920) 748 -6520
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NOV -21 THU 02:48 PM BREWER HEATING FAX:19207486520 PAGE 2
NOV --21 -2002 1234 DESIGN AIR • .v3 Irii w r o . ly;;. P. 01/01
it . 4Illrl , .. ' . Y(>uVContylete 1 calins
: & Cooling Wholesaler
DESIGN AIR
•A e ivisIOPl.OF U.S. OIL CO.. INC.
11/21 /2002 •
Brewer Heating •
Doug Brewer •` ' . •
RE: Large house ventilation caleideiions ., • • . . •
•
Doug,
Please recall our phone conversation today (Thursday 11121/2002) regarding a large home in
which you were involved in providing°.the required ventilation. 'Wisconsin Code COMM .
23.02(30x2) states that passive intake air ductaproviding air for intermittent exhaust fans shall
be sized to provide at least 40% of the total air that would be exhausted with all intermittent
exhaust ventilation in the dwdtling•opeerating simultaneously. • Table 23.07 (duct velocities) allows
outdoor intake ducts to be sized to accommodate a minimum duct velocity of 500 feet per minute
and a maximum velocity of 800 feet per minute.
The specific house that you had described had this following exhaust potential:
Five (5) 50 *fin bathroom fans = total 250 CFM
One large kitchen hood fan = 600 CFM ' '
Total potential exhaust CFM = 850 CFM , .
850 total CFM x .4 (40%) = 370 CFM
A 10" round fresh air intake could• accommodate 370 CFM at a velocity of approximately 700
feet per minute. Therefore, a 10" nee area intake should be permissible. Once inside the house,
you could branch off of the 10" round; intake pipe with three 6" round pipes leading to the
existing I-IVAC equipment ductwork.,,.: eh : d ", pipe could accommodate approximately 125
CFM. Therefore you could meet and exceed, the fresh air intake requirements for the home based
nn exhaust rates that you had informed me. .
Please call me with any further questions. ,,i�'
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Sincerely yours, �,,���..��..+te..o��! "''�•,,�'
.�,�/ Ap ^tZVEGSR A
Ron Krueg - n_ien I 1 .
Design Air 1 , ' KIIVIBERLY s
Wisconsin Designer of tVAC Systems #D 1 0 83 -H . 3`s� Nil ,r
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KIMBERLY BfREEN BAY : WESTAtWB IRON IIOUNTAII4, MI MILWAUKEE
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04 be4y, WI 54136 PH: 920.4944676 PH: 414966•7444 PH: 906. 7180810 PH: 414.2764677
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