Determining Your Airflow Requirement; Operating Conditions - Fantech FIT 70E Manuel D'installation Et D'utilisation

DETERMINING YOUR AIRFLOW REQUIREMENT

1 CFM = 0.47 L/s
1 L/s = 2.13 CFM
ASHRAE method
Floor area
Ft 2 m 2
<500 <47
205-1000 47-93
1001-1500 94-139
1501-2000 140-186
2001-2500 187-232
2501-3000 233-279
3001-3500 280-325
3501-4000 326-372
4001-4500 373-418
4501-5000 419-465
* ASHRAE 62.2-2016 Table 4.1, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings.
Bathroom: If the ERV is going to provide the required local exhaust ventilation for each bathroom with each a continuous 20 CFM
(10 L/s), this ventilation rate can be considered as part of the whole-building ventilation rate.

Operating conditions

This ventilation system is designed to operate under standard humidity and temperature conditions. However, some extreme conditions may cause the
exchanger to freeze or produce an excessive amount of water condensation. This ventilation system should not be operated with an indoor humidity
above 50% in combination with an outdoor temperature below -10°C (14°F) for more than 12 continuous hours.
Residential ERV ventilation systems are not suitable for pool or spa applications.
4
Room Count Method
Room classification
Master bedroom
Basement
Bedrooms
Living room
Others
Kitchen
Bathroom
Laundry room
Utility room
Ventilation Air requirements
1 2
CFM L/s CFM
30 128 38
45 21 53
60 28 68
75 35 83
90 42 98
105 49 113
120 56 128
135 63 143
150 70 158
165 77 173
Number of rooms
yes or no
Total Ventilation Requirements (add last column )
Bedrooms
3
L/s CFM L/s
18 45 21
24 60 28
31 75 35
38 90 42
45 105 49
52 120 56
59 135 63
66 150 70
73 165 77
80 180 84
CFM (L/s) CFM Required
x 10 L/s (20 CFM)
if yes add 10 L/s (20 CFM)
if no = 0
x 5 L/s (10 CFM)
x 5 L/s (10 CFM)
x 5 L/s (10 CFM)
x 5 L/s (10 CFM)
x 5 L/s (10 CFM)
x 5 L/s (10 CFM)
x 5 L/s (10 CFM)
4 5
CFM L/s CFM
53 25 60
68 31 75
83 38 90
98 45 105
113 52 120
128 59 135
143 66 150
158 73 165
173 80 180
188 87 195
=
=
=
=
=
=
=
=
=
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L/s
28
35
42
49
56
63
70
77
84
91