Aprilaire 8100 System START-UP, Ventilation Air Requirements, CFM, Cycle Time Setting minutes

SYSTEM START-UP (continued)

Table 2 – Ventilation Air Requirements, CFM

Home Size (ft2)			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					CFM Required (from Table 2)
(refer to Table 1)	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 ft2 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..

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