03 379 3589

HRV Heat Recovery Ventilation

A controlled ventilation system that reduces humidity, pollutants and odours.


A Heat Recovery Ventilator (HRV)

An HRV is a controlled ventilation system that reduces high humidity, pollutants and odours by replacing stale air with fresh warm air.
Exhaust air is not only stale and damp, but warm.   It is this warmth that is used to pre-heat fresh air as it enters your home.   All HRVs have two fans and an in-built "Air to Air" Heat Exchanger, which transfers heat from the exhaust air stream to the cold fresh air supply.  By the natural laws of physics, whenever cold air is warmed, humidity is reduced, and condensation control is the result.  The two air streams are 100% separated at all times.  The fresh air introduced into your home is warm and dry and provides a permanently fresh, healthy, indoor environment.
An HRV can recover up to 5 times more energy than it costs to operate. This level of efficiency is unmatched by any other domestic appliance.
Unlike other condensation control devices, HRVs perform best, when conditions are at their worst.   Sunshine, a warm roof space or heating elements, are unnecessary.  HRVs ventilate, 24 hours a day, every day.

An HRV Will:

  • Exhaust, stale, polluted, humid air.
  • Introduce fresh, dry, warm air
  • Transfer heat from stale, damp, exhaust air to preheat fresh incoming air
  • Reduce condensation, mould, mildew, etc.

What  an HRV System Will Do.
An HRV is a controlled ventilation system that recovers and recycles energy from an Exhaust Air Stream. In winter the HRV recovers heated energy, and in Summer, if your home is air conditioned, the HRV recovers cooled energy.
Many older homes were built with high rates of natural air leakage that may have made the homes draughty, and difficult and expensive to heat, but the indoor air quality was provided by the rate of natural leakage.
Since the introduction of the 1992 Building Code, homes have to be energy efficient. The easiest way to achieve energy efficiency is to make the house as leak proof as possible. Older homes that have been "tightened up" by insulating, installing aluminium windows, and other draft reducing measures, have similar problems.
Modern lifestyles, and the need for security, cause many homeowners to keep their homes as sealed from outside as possible, thus creating the problems of unhealthy indoor air quality.
Overall, the effect of making homes "tighter" is to cause Indoor Air QUALITY problems.
The best solution, is controlled ventilation, and dehumidification with energy recovery -- an HRV.


An HRV is most effective as a Winter ventilation system to …….
Dehumidify and ventilate with 100% fresh outdoor air and to maintain INDOOR AIR QUALITY.
In Summer, the HRV will maintain Indoor Air QUALITY, and it will contribute to improving Indoor Air COMFORT, but if the home suffers from excessive heat gain from sunshine on hot summer days, the HRV may not have sufficient capacity provide Indoor COMFORT.
The HRV cannot dehumidify outdoor air when the outdoor air is warmer than indoor air, in these conditions it is a controlled ventilation system that supplies air to, and exhausts air from, the home.