Attempting to Live a Sustainable Lifestyle in St. Louis

Environmentally friendly decisions are tough

ERV (energy recovery ventilator), do I need one? August 31, 2007

Filed under: Green Rehab,Mechanical Systems — budint @ 8:28 pm

Can you see a salesman going door to door selling ERVs? That’d be entertaining.

An ERV or HRV (heat recovery ventilator) is about $750 for the equipment (which is a BR70 from Renewaire), then another couple hundred to install. So let’s just call it $1k.


Why: We’re building a super efficient home. As little air leakage as possible. And that’s a good thing. However, since the house is sealed tight, you’re breathing the same air, over and over again. Similar to being on an airplane, except with out the air purifier. Now this gets even worse when you add the scents and smells of cooking to your already stale air.

How: So the ERV attaches to your HVAC system and when running brings fresh air in from outdoors while removing the stale indoor air. Bringing fresh air in is a great idea, right? Kind of a no-brainer. The problem is when the outside temp is really hot or cold. You’d be bringing in that extreme temperature air and killing your energy bill.

Wallah!! This is what the energy recovery portion does. It has a fancy way of bringing in fresh air without bringing in the extreme climates outside, so that you’re not compromising your energy efficient home. See fancy video on Renewaire’s site.

So the big question is, do I drop the $1000 and have this thing installed during the project, or do I take my chances with stale air?


One Response to “ERV (energy recovery ventilator), do I need one?”

  1. […] Filed under Live Green 2.0, Mechanical Systems &#183 Tagged ERV, renewaire, ventilator  So I’ve been up in the air about this ERV (ventilator) for a while now.  In our current apartment I’m reminded daily […]

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