14
Envirowise XT155H Installation Instructions
GENERAL SET UP
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 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 0.03] + [(3+1) X 7.5] = 105 CFM
Example 2: Number of Occupants
2500 square foot house with 3 bedrooms, 5 occupants = [2500 X 0.03] + [5 X 7.5] = 112.5 CFM
Record the required CFM ____________
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 2: Calculating Airflow Requirement Using Table 4.1 from ASHRAE 62.2-2016
Record the required CFM ____________
Floor Area
(ft
2
)
< 500
501 - 1000
1001 - 1500
1501 - 2000
2001 - 2500
2501 - 3000
3001 - 3500
3501 - 4000
1
30
45
60
75
90
105
120
135
2
38
53
68
83
98
113
128
143
3
45
60
75
90
105
120
135
150
4
53
68
83
98
113
128
143
158
5
60
75
90
105
120
135
150
165
Number of Bedrooms
Ventilation Air Requirements, CFM
Table 4.1 from ASHRAE 62.2-2016
