If you want a true energy recovery ventilator for your home, a
balanced system with a real heat exchanger is the only way to
truly recover energy which is usually wasted, to warm or cool
your home. This is no more evident than in the findings of a
comprehensive Otago University Report commissioned for EECA
(Energy Efficiency and Conservation Authority), researching the
heating and cooling potential of ventilation systems. The study
carried out by the Department of Physics at Otago University was
published in May 2011. The report specifically focused on
current domestic residential systems, measuring the amount of
heating and cooling available for capture from roof space air.
The report states, “The majority of the time, it was calculated
that pumping air from the roof space into the house would
provide no heating or cooling benefit.” If you are looking to
purchase a ventilation system and you are considering heat
recovery as part of this, make sure you do your homework. Most
ventilation systems will work best