HRV Commercial
HRV has a thriving trade division supplying many major
developers and builders with systems to make their homes
warmer, drier, healthier and more energy efficient.
Many architects and designers now specify HRV as a standard in
their designs.
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Here to see our partners
If you are a builder, architect, developer or property manager
please contact our Commercial Manager directly:
Rhonda Taylor
0800 HRV COM (0800 478 266)
09 826 3767
027 600 9073
Rhondat@hrv.co.nz
Builders Tips:
Why builders should discuss ventilation with their
clients
- New homes are being sealed up really tightly with new
requirements for insulation, building wrap and double
glazing.
- The building code requires at least 0.35 air changes per
hour or at least one complete air change every 3 hours.
- The G4 code states that this shall be achieved by
providing a net openable area of windows of other openings of no
less than 5 % of the floor area.
- Home owners are creating anything up to 20 or 30 liters
of moisture per day by showering, cooking, breathing, etc.
- A Californian study showed that less than 17% of their
home owners open more than one window on a regular basis for
ventilation. We believe that NZ figures are very
similar.
- Because we are not ventilating our homes on a regular
basis high levels of moisture are retained within the building
envelope leading to mould and other problems.
- As a builder your reputation is based on the
functionality of your homes which can be drastically affected by
excess moisture (crying windows).
- Double glazing has the effect of raising the temperature
of the internal glass and thus may reduce the amount of
condensation on this area. However the actual
level of moisture is likely to have been increased and the
condensation is now more likely to appear on the aluminium unless
the thermally broken suite is used.