Heat Recovery Ventilator HRV For Tight Sealed Homes
Heat Recovery Ventilator HRV For Tight Sealed Homes Modern homebuilding has succeeded so thoroughly at one of its core goals, sealing the building envelope, that it has accidentally created a new problem. A house built to current energy codes, with continuous air barriers, gasketed sheathing, and meticulously taped seams, can achieve air change rates below 1.0 per hour at 50 pascals , which is roughly five times tighter than the homes most contractors built thirty years ago. That achievement saves enormous amounts of heating and cooling energy. It also traps cooking moisture, off-gassing furniture chemicals, carbon dioxide from breathing occupants, and a wide variety of indoor pollutants that older drafty homes simply leaked out through every gap. The Heat Recovery Ventilator , or HRV, is the elegant mechanical answer to that problem. An HRV continuously exhausts stale indoor air to the outside while simultaneously drawing fresh outdoor air inside, all through a core that tran...
