Hrv In Attics

Punching through outdoor walls.

Hrv in attics.

The installation is in the attic of a house. Even running air exchanger or hrv ductwork through an attic causes all kinds of problems. A heat recovery ventilator hrv sometimes called an air to air heat exchanger is different than conventional vents and fans. Problem number one the openings at the ceiling around ductwork is rarely properly sealed totally air tight.

This reduces the energy required to bring outside air up to ambient room temperature so saves money on heating bills. The low air volume will get in and out of the ductwork as soon as it can closest to. A multiple speed unit operating at anything less than full speed is not going to pull or push air from the furthest points away from the hrv. Problem number two the ducts often leak hot or cold air into the attic wasting energy.

This reduces the energy required to bring outside air up to ambient room temperature. This video describes the steps for installing a venmar air exchanger ea 1500 replacing an older air exchanger. A strong ventilation system was the answer and its secret weapon was a heat recovery ventilator aka an air to air heat exchanger. Creating two 6 inch diameter duct holes through an exterior wall one for fresh air intake and one for stale air exhaust is usually the most challenging part of any hrv installation job especially if you ve got to go through a masonry wall.

An hrv in an attic is generally not recommended by the mfg as you have to drain it and the condensate will freeze. An hrv is a simpler system that enables exchange only of sensible heat energy you can measure with a thermometer from exhausted indoor air to temper incoming fresh air. Hrv units should never be placed in attics to function properly and efficiently they should be within the. That air s heat as possible.

This type of system also captures some of the. With standard ventilation air circulates through static open vents or is expelled by fans such as those used in bathrooms kitchens and attics.