VENTILATORS VH30100 - Ventilation Requirements; Determine Your Ventilation Needs

VENTILATION REQUIREMENTS
WWW.CLEANCOMFORT.COM
4
IO-VENT-SS
Determine Your
Ventilation Needs
Good indoor air quality is based
in part on the capacity of the
home’s venlaon system.
The two most common
methods for determining the
venlaon needs of a home are
the Room Count Calculaon
method and the Air Change
Per Hour method. Both
methods calculate an
approximate venlaon rate
(in CFM or L/s). Their calculaon
methods are described on
this page.
A. Room Count Calculation Method
LIVING SPACE NUMBER OF ROOMS CFM (L/S) CFM REQUIRED
Master Bedroom
————
x 20 cfm (10 L/s) =
————
Basement
————
x 20 cfm (10 L/s) =
————
Single Bedroom
————
x 10 cfm (5 L/s) =
————
Living Room
————
x 10 cfm (5 L/s) =
————
Dining Room
————
x 10 cfm (5 L/s) =
————
Family Room
————
x 10 cfm (5 L/s) =
————
Recreaon Room
————
x 10 cfm (5 L/s) =
————
Other
————
x 10 cfm (5 L/s) =
————
Kitchen
————
x 10 cfm (5 L/s) =
————
Bathroom
————
x 10 cfm (5 L/s) =
————
Laundry Room
————
x 10 cfm (5 L/s) =
————
Ulity Room
————
x 10 cfm (5 L/s) =
————
TOTAL ventilation requirement (add last column) =
1 CFM = 0.47189 L/s
1 L/s = 3.6 m3/hr
B. Air Change Per Hour Calculation Method
TOTAL volume of the house (in cubic feet) X 0.35 air changes/hour = CUBIC FT/HR
Take total CUBIC FT/HR and divide by 60 to get CFM
Example: A 25'x 40' house with basement:
25' X 40' = 1,000 sq. .
1,000 sq. . x 8' room height x 2 storeys
(1st oor + basement) = 16,000 cu. .
16,000 cu. . x 0.35 ACH = 5,600 cu. .
5,600 cu. . / 60 = 93.3 CFM
93.3 CFM is your ventilation requirement