OK the house is extremely air tight… now what? The solution is to install an Eneready Heat Recovery Ventilation system which will provide quiet, comfortable and continuous fresh air year-round with the energy saving benefit of “heat recovery”. The 24 volt motor will draw its operating electrical power directly from the 24 volt batteries that are being charged by the PV solar panels. Inside the HRV the warm, perhaps moist, stale exhaust air leaving the house transfers its heat to the incoming cooler, fresh air stream.
This HRV not only prevents stuffiness, odours and condensation problems within the house, at 22 watts of electrical power consumption it helps achieve significantly reduced heating and electrical requirements while keeping the indoor air fresh.
Dave Hill at Eneready built this 24 volt prototype HRV for me for which I am very grateful… thank you Dave.
I have been working in the heating and ventilation industry and consulting to people building new homes for 30 years. Good stewardship of resources and concern for the environment have been my focus. In 1982, we built (and still live in) one of the most energy efficient R2000 homes in Canada. My other involvements relating to energy efficiency, comfort and health in the home include speaking on numerous radio talk shows, teaching workshops and appearing on 
I’m curious about the load that the HRV presents. Do you have a feel yet for how much power the HRV consumes each day?
I have a customer who is interested in an HRV for his new off-grid place, but I’m cautious about committing to an active ventilation system that might tax his energy budget. Any thoughts from your experience would be greatly appreciated. Thanks!!
Comment by Matt — August 2, 2009 @ 2:47 pm