Healthy Climate Solutions ERV5-130, Installation Instructions Manual

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Timed
• When timed mode is selected, the system assures that
low speed ventilation has run for at least the selected
time per hour.
• The system first tries to satisfy the required ventilation
run time by only ventilating while conditioning is occur-
ring.
• The time remaining in the hour time block is compared
to the required ventilation run-time remaining and if the
time remaining in the hour is equal to or less than the
remaining ventilation run time required, then low speed
ventilation is started and stops when the hour time block
is over or the required timed ventilation duration is sat-
isfied.
• If ventilation now is selected by homeowner the unit will
change from low speed operation to high speed.
• If the time is greater than the ventilation run-time the
unit will switch to high speed until the run-time ventila-
tion rate is satisfied.
ASHRAE
• ASHRAE 62.2 is a national standard that provides
methods for achieving acceptable indoor air quality in
typical residences. It was developed and is maintained
by the American Society of Heating and Air-Conditioning
Engineers (ASHRAE).
• One of the standard three main components is Whole
House Ventilation which is exhausting stale indoor air and
replacing it with fresh outdoor air.
• The exhaust fan dilutes the air in the main living spaces
with outside air to remove unavoidable contaminants
from people, pets, cleaning, off gassing, etc.
• The whole house fan flow rate is determined based on
the floor space and the number of bedrooms. The whole
house fan provides multiple air exchanges within the
home each day. The operation can be continuous or
intermittent (much higher airflow cycled by a timer) if 1
zone or less.
Formula Method
Example a 2000 square foot home with 4 bedrooms from
ASHRAE 4.1 a quick reference chart predicts 98 cfm.
Formula:
(Square feet x 0.03) + (be 1 x 7.5) = 97.5
(2000 X 0.03) + (4+1) X 7.5) = 97.5
Table Method
The following table complies with ASHRAE Standard 62.2,
Table 4.1a, Continuous Whole-Building Ventilation rate in
cfm.
Table 8. Whole Building Ventilation Air Requirements
Number of Bedrooms
Floor Area 1 2 3 4 5
(Square
Feet)
cfm cfm cfm cfm cfm
<500 30 38 45 53 60
501 - 1000 45 53 60 68 75
1001 - 1500 60 68 75 83 90
1501 - 2000 75 83 90 98 105
2001- 2500 90 98 105 113 120
2501 - 3000 105 113 120 128 135
3001 - 3500 120 128 135 143 150
3501 - 4000 135 143 150 158 165
4001 - 4500 150 158 165 173 180
4501 - 5000 165 173 180 188 195
For more information about ASHRAE, go to:
https://www.ashrae.org.