Hrv In Attics

The installation is in the attic of a house.

Hrv in attics.

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. With standard ventilation air circulates through static open vents or is expelled by fans such as those used in bathrooms kitchens and attics. This video describes the steps for installing a venmar air exchanger ea 1500 replacing an older air exchanger. Problem number one the openings at the ceiling around ductwork is rarely properly sealed totally air tight.

This type of system also captures some of the. Punching through outdoor walls. That air s heat as possible. 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. This reduces the energy required to bring outside air up to ambient room temperature so saves money on heating bills. Heat recovery ventilation hrv is a system that uses the heat in stale exhaust air to preheat incoming fresh air. 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.

The goal was to rid the house of its stale moist air while keeping as much of. Problem number two the ducts often leak hot or cold air into the attic wasting energy. A strong ventilation system was the answer and its secret weapon was a heat recovery ventilator aka an air to air heat exchanger. An erv does a little more than an hrv.

An hrv in an attic is generally not recommended by the mfg as you have to drain it and the condensate will freeze. This reduces the energy required to bring outside air up to ambient room temperature.