Sorry - Heat Recovery Ventilator. It's a heat exchanger that's increasing the inside/outside air turnover in my house (swapping inside air for outside air, but preheating in the incoming air using the heat from the outgoing air). I was having some terrible humidity issues in my house and this was my last ditch attempt to get that under control. Basically a bathroom fan to suck air out, but takes two extra steps - one to replace the air it removes, and two to preheat that air so that the furnace isn't reheating the air. So although it's a bump in energy consumption, it's not a huge waste of energy consumption to keep humidity at bay.
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Originally Posted by bassman
Excuse my ignorance but what is a HRV?
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