Wednesday, June 1, 2011


HRV's are recommended for most regions of North America, where the heating season is longer than the cooling season.  In winter, HRV's retain heat from outgoing air and transfer to incoming air.  In summer HRV's work in reverse, retaining cooler air conditioned air and transferring to incoming fresh air

ERV's are recommended in regions where high outdoor humidity is cause for operating air conditioning/ dehumidification for an extended period of the year, and much more frequently than a heating system.  The ideal geographic area of use defined by AHR standards is the Southeast U.S. – Florida, Georgia, Alabama, Mississippi, and Carolinas only.  ERV's are NOT recommended in any region of Canada, or in the United States where temperatures fall below 25F (-4C) for more than five days, where freezing of the internal core can occur.

Today some manufacturers lead Contractors and Builders to believe ERV's are better than HRV’s in cold climates. The fact is Lifebreath HRV's outperform the competitors ERV's and they are also cold weather certified.

The competitors ERV's are not!