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17
Ventilation
The following installation tips start from the outside of the house and work to the inside duct
system, machine, controls and exhaust/supply ports:
1. Exterior hoods for exhaust and supply should be installed
atleast6'apart.Onehoodbringsinfreshair,theother
exhausts stale air. Combination hoods with separate
streams are now available.
2. Short,roundductrunsareinstalledfromtheHRV/ERVto
the outside hoods. Best to insulate these short runs to
avoid condensation.
3. HRV/ERVsaretypicallysuspendedfromthebasement
ceiling.Ahangingkitcomeswiththemachine.Heat/
humiditytransferhappensinthecoreoftheHRV/ERV.
4. 6" or 8" round rigid ducts should be used for trunk lines.
5. 4" branch lines are often used to travel through inside walls
and other framing.
6. Exhaust and Supply ports should be located on ceilings
orhighonwalls,asfarintoroomsaspossible.
7. Deliverfresh,lteredairtobedrooms,homeofces,
nishedbasements:placeswherepeople
spend time.
8. Exhauststaleairfrombathrooms,kitchens,hobbyand
exerciserooms:placesthatgeneratemoistureandodors.
9. Low voltage Central Control should be located in the
main body of the house but not the kitchen area.
Make it easy for the occupant to see and operate.
10. Low voltage boost switches get located in rooms where
exhaustportsareinstalled—bathrooms,hobbyand
exercise rooms.
Call EFI Wholesale for further information and guidance.
We want you to ventilate right!
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Whole House Ventilation
TIP: Even if you are installing exhaust ports from
yourHRVorERVinbathrooms,werecommend
also using an exhaust fan for duty exhaust. The
HRV/ERV
runs
slowly
and
steadily
a
nd
d
oes
ag
reat
job providing fresh air and exhausting stale air. To
evacuateabathroomquickly,yourcustomerwill
want to have the option of additional exhaust.
INFORMATION: All duct runs should be as
straight as possible. Use rigid duct with few
elbows. It is important to insulate any duct
travelingthroughun-conditionedspaces.
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