R-2000 Housing

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R-2000 Housing
Ventilation System
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Typical Ventilation Problems
-Too little or too much ventilation -Insufficient
ventilation results in excessive indoor humidity
-Uncontrolled ventilation can cause exhaust
leaks within the house
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Ventilation in R-2000 Homes
-Energy efficient mechanical heat recovery
ventilation system -Provides continuous
circulation of filtered outdoor air -Saves
energy through use of a heat recovery device
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Heat Recovery Ventilation System
Here are the specifications for a
properly installed HRV system 1. If the kitchen
exhaust is located in a ceiling or wall, it must
be within 300 mm (12 in.) of the ceiling. The
duct must be accessible for cleaning unless the
intake is equipped with a grease filter. 2.
Supplemental exhausts in the kitchens and
bathrooms are not exhausted by the HRV but are
controlled by a manual switch in the room being
served. 3. Door under-cuts or transfer grilles
allow air movement from supply-air grilles to
exhaust grilles. 4. If a solid-fuel-fired
appliance is present, the HRV must be installed
to operate without depressurizing the house in
any operating mode. 5. Supply-air ducts
carrying untempered air through heated spaces
must be insulated to at least RSI 0.5 (R-2.9).
6. Exhaust ducts in unheated spaces must be
insulated to RSI 0.5 (R-2.8). 7. The HRV
supplies outdoor air directly to the principal
living area each bedroom any floor without a
bedroom 8. The HRV is operated by centrally
located manual controls or by automatic controls.
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Heat Recovery Device
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Reference
http//oee.nrcan.gc.ca/english/index.cfm?attr4