Only a genuine Heat Recovery Ventilation System will deliver fresh outdoor air throughout your home
The above graphic shows "fresh air" entering the HRV and passing
through the heat exchanger and being ducted to the house as warm dry
fresh air. The same volume of air is then extracted as "warm stale humid
air and passes through the heat exchanger in the opposite direction to
go outside as stale moist air. The heat exchanger will collect up to 95%
of the outgoing heat to be recycled back into the fresh incoming air,
so most of your valuable heat stays inside where you want it.
Condensation and mold is therefore eliminated or reduced while
maintaining a constant fresh air environment and minimizing the heating
required to maintain a comfortable internal temperature. If your home
has lower humidity the air can actually feel warmer. An HRV system is
not a heater - it simply transfers waste exhaust heat to incoming fresh
air and maintains separate extract and intake air flows. Understanding More About Moisture
See the difference between Genuine HRV and the others
Depending on the heat exchanger model you choose, between 80 and 95
percent of the heat energy is recovered from the extracted air and so
ventilation heat loss is enormously reduced, and due to the heat
exchanger the system pays back its cost by recovering up to five times
more energy than the energy consumed by the two fans.
For air-conditioned homes, the HRV recovers and recycles ?cooled
energy?, saving summer energy costs. If your home is not air
conditioned, and your lifestyle is to have windows open in summer,
switch the HRV OFF. Optional automatic controls are available.
Infiltration due to air leakages (draughts) in the building envelope
cause additional ventilation heat loss without heat exchange, which can
exceed the scheduled ventilation heat loss of the HRV system, especially
when using very efficient heat exchangers.
In buildings with poor air tightness (most pre 1980's homes) the
ventilation heat loss is therefore mainly affected by air leakages.
Improving the air tightness of the building envelope will reduce
ventilation heat loss considerably and optimize the performance of your
HRV system. Our V-Seal draught stopping strip is perfect for this situation.
Before you decide on a ventilation system, make sure it brings in outdoor air and not roof space air!
NZ Standard 4303 "Ventilation for Acceptable Indoor Air Quality"
requires outdoor air for ventilation. Roof space air is not outdoor air.
It may be polluted by dust, loose insulation fibres and biological
contaminants, which are a potential health risk when inhaled. Biological
contaminants will accumulate on air filters; most allergens pass
through even the best air filters. Inspect your roof space through the
manhole. Decide yourself, what you want to breath - fresh or polluted
Besides, attic or roof space fans pressurize the home and force your
valuable warm air to the outside and into walls and other cavities,
where it may cause mould/mildew problems and structural rot as a result
of condensation. The fans may cost "cents to run", but what is the cost
of the warm air forced out of your home? An electric 1 kW heater to
replace that wasted heat, running 24 hrs a day, will add $180 to your
monthly power bill (@ 25 cents per kWh).
Contact us for a free home assessment.
The Cleanaire HRV is supported by an extensive Warranty
Cleanaire HRV Brochure
Cleanaire HRV Technical Info Sheet
2 Tepuni St Petone
(opposite Smith and Smith glass)
Hours: 8.30am-5.00pm Mon-Fri
Saturdays - 9am -1pm
Phone 04 939 0313
Fax 04 939 3965
PO Box 38-028
Wellington Mail Centre, NZ