Heat Recovery Ventilation

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What is Heat Recovery Ventilation?

True Energy & Heat Recovery ventilation systems focus on recovering the heat in your home as it is replaced by fresh air. In contrast a positive pressure ventilation system pushes your home's warm air out with cooler fresh air.

Heat recovery ventilation systems are generally a balanced pressure system designed to keep the air quality high while minimising temperature change. They remove warm and damp air from living spaces and pass it through a heat recovery system (also known as a heat exchanger) to warm up dry, cool air which has been pulled in from outside.

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Great for newer airtight homes, energy and heat recovery systems can be used for whole home, multi-room or single room applications to maintain indoor air quality and transfer the energy of incoming supply air through a heat exchanger with outgoing exhaust air being expelled from the home.

ERVs and HRVs tend to be balanced pressure ventilation systems as they balance the pressure of gently introducing fresh, filtered air into the home while mechanically extracting the same amount of stale, moist air.

The difference between the two systems is the type of material used in the heat exchanger core - HRVs are better in dry environments and ERVs are best in humid environments. Depending on your local climate zone, we can help select the best recovery system for your home.

ERV & HRV systems can help reduce the heating or cooling running costs of a home in New Zealand's temperate climate and are used for maintaining good indoor air quality with high filtration.

Not just a balanced system, some ERV & HRV models can be configured to be either a slight positive or negative pressure system by adjusting the speed of the supply and exhaust air fans.

In older homes, most ventilation systems in New Zealand are positive pressure systems where the fresh air displaces the stale moisture laden air through gaps around windows, doors, light fittings etc.

Read more here about our Mitsubishi Lossnay recovery ventilation system.

Need home ventilation?

Our advice and quotes on home ventilation are free with no-obligation. Positive pressure, Balanced Pressure or Heat Recovery - we can help.

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Call us on 0800 888 766

Finance & Funding

We have financial support available to make installing ventilation systems in your home more affordable.

  • One Smart Energy 24 month instalment plan
  • Mortgage Top-Ups for energy efficiency products
  • Q Card Finance
  • Squirrel Money

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Need home ventilation?

Our advice and quotes on home ventilation are free with no-obligation. Positive pressure, Balanced Pressure or Heat Recovery - we can help.


Hate filling in forms? Call us direct 0800 888 766

We answer 24 hours, 7 days a week so call us anytime.

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