Determine Ventilation Requirements - Ultra-Aire 98H Installation & Operation Instructions

Determine Ventilation Requirements

The MINIMUM ventilation requirement is calculated using ASHRAE 62.2-2016. Use one or both of the options below
to determine your ventilation requirement. Follow all local and national building and safety codes.
Option 1: Calculating Airflow Requirement Using ASHRAE 62.2-2016 Airflow Equation
ASHRAE Airflow in CFM = [House Area in Sq.Ft. x 0.03] + [(Number of Bedrooms +1) x 7.5]
NOTE: Use 'Number of Bedrooms + 1' or 'Number of Occupants', whichever is larger.
Example 1: Number of Bedrooms + 1
1800 square foot house with 3 bedrooms, 4 occupants = [1800 X 0.03] + [(3+1) X 7.5] = 84 CFM
Example 2: Number of Occupants
1800 square foot house with 3 bedrooms, 5 occupants = [1800 X 0.03] + [5 X 7.5] = 91.5 CFM
Record the required CFM ____________
Option 2: Calculating Airflow Requirement Using Table 4.1 from ASHRAE 62.2-2016
Ventilation Air Requirements, CFM
Floor Area
(ft )
2
< 500
501 - 1000
1001 - 1500
1501 - 2000
2001 - 2500
2501 - 3000
3001 - 3500
Record the required CFM ____________
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FRESH AIR VENTILATION
Number of Bedrooms
1 2
30 38
45 53
60 68
75 83
90 98
105 113
120 128
4
3
53
45
68
60
75 83
90 98
113
105
128
120
143
135
Table 4.1 from ASHRAE 62.2-2016
Ultra Aire 98H / 120H Installation Instructions
5
60
75
90
105
120
135
150
11