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Ultra-Aire XT105H Installation Instructions
www.Ultra-Aire.com | 1-800-533-7533
Option 1: Calculating Airflow Requirement Using ASHRAE 62.2-2010 Airflow Equation
ASHRAE Airflow in CFM = [House Area in Sq.Ft. x 0.01] + [(Number of Be1) x 7.5]
NOTE: Use ‘Number of Be 1’ or ‘Number of Occupants’, whichever is larger.
Example 1: Number of Be 1
2500 square foot house with 3 bedrooms, 4 occupants = [2500 X 0.01] + [(3+1) X 7.5] = 55 CFM
Example 2: Number of Occupants
2500 square foot house with 3 bedrooms, 5 occupants = [2500 X 0.01] + [5 X 7.5] = 62.5 CFM
Record the required CFM ____________
FRESH AIR VENTILATION
Determine Ventilation Requirements
The MINIMUM ventilation requirement is calculated using ASHRAE 62.2-2010. Use one or both of the options
below to determine your ventilation requirement. Follow all local and national building and safety codes.
Table 4.1 from ASHRAE 62.2-2010
Floor Area
(ft
2
)
< 1500 ft
2
1501 - 3000
3001 - 4500
4501 - 6000
6001 - 7500
> 7500 ft
2
0-1
30
45
60
75
98
105
2-3
45
60
75
98
105
120
4-5
60
75
98
105
120
135
6-7
75
98
105
120
135
150
>7
98
105
120
135
150
165
Number of Bedrooms
Option 2: Calculating Airflow Requirement Using Table 4.1 from ASHRAE 62.2-2010
See chart below to find the calculated airflow values to the nearest 5 CFM.
Record the required CFM ____________
Ventilation Air Requirements, CFM
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