Heat Recovery Ventilation Systems

Learn about Heat Recovery Ventilation (HRV) systems. They're perfect for new and relatively airtight homes and help avoid heat loss in winter from cold air ventilation.

What is Heat Recovery Ventilation (HRV)?

Heat Recovery Ventilation systems are also referred to as HRV systems or Energy Recovery Systems and they aim to ventilate your home without underdue loss of heat in winter or heat-gain in summer.  

They are also the best system for air-tight homes. Most NZ 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.  

Benefits of Heat Recovery Ventilation

There are three main reasons why a balanced or Heat Recovery Ventilation (HRV) system are of increasing relevance for New Zealand homes.

Ventilation for Airtight Homes

New home construction methods have less gaps which is a good thing as they're thermally more efficient.  Unfortunately this means there is nowhere for damp, stale air to escape through either naturally or through a conventional positive-pressure ventilation system. The balanced approach to a Heat Recovery Ventilation (HRV) system is that air is simulatanously removed mechanically from the home to balance the air coming in.

Energy Efficiency of Heat Recovery systems

In winter we spend a high proportion of our power bills on staying warm through heat pumps and heaters. As a traditional ventilation system pushes the damp, warm air from the home and replaces it with fresh but cold air which then has to be heated again.

The balanced nature of a heat recovery system means that the temperature of the air being removed from your home is used to temper the fresh air coming in - it reuses the energy you've already paid for to warm the incoming cool air.  While there are tempering heaters that can be fitted to a positive-pressure system to warm the incoming air - they are not as efficient as a energy recovery system.

Improved Comfort

One issue that people can experience with a positive pressure system is a noticeable draught in winter from the cold air.    With a balanced heat recovery system you'll not notice the air temperature difference and can enjoy healthier air in comfort.

SmartVent Synergy Ventilation 

After working with a number of ventilation providers, our preferred heat recovery ventilation brand is SmartVent Synergy.  

SmartVent Synergy is manufactured by a trusted NZ company with excellent back up.  Their SmartVent Synergy system has insulated ducting to retain temperature and reduce noise and can be combined with their sophisticated SmartVent Evolve control system.  SmartVent Evolve uses sensors to measure humidity and temperature in and around your home to deliver the best ventilation and comfort.

To learn more about Heat Recovery Ventilation options for your new or existing home - request a free home assessment.