Filter
Top Products
SYSTEM START-UP (CONTINUED)
Table 2 – Ventilation Air Requirements, CFM
Home Size (ft
2
)
Number of Bedrooms
< 2 2 - 3 4 - 5 6 - 7 > 7
≤ 1500
30 45 60 75 90
1501 – 3000
45 60 75 90 105
3001 – 4500
60 75 90 105 120
4501 – 6000
75 90 105 120 135
6001 – 7500
90 105 120 135 150
> 7500
105 120 135 150 165
Table 3 – Cycle Time Setting (minutes)
CFM Delivered
(refer to Table 1)
CFM Required (from Table 2)
20 30 40 50 60 70 80 90 100 110 120
100
15 20 25 30 35 40 50 55 60
120
10 15 20 25 30 35 40 45 50 55 60
140
10 15 15 20 25 30 35 40 45 50 55
160
10 10 15 20 25 25 30 35 40 45 50
Example: For a 4,000 ft
2
home with 5 bedrooms, the required mechanical ventilation rate from Table 2 is 90 cfm. If the ERV is operating at 120
cfm, set the cycle time on the control for at least 45 minutes/hour.
11