The heated or cooled interior air is exchanged with the exterior fresh air, while transferring some of the heat and coolness generated in the home. Another alternative is the energy recovery ...

While necessity may be the mother of invention, it's increasing costs that spawn efficiency. Before the '70s, we happily cranked up the thermostat when the house felt chilly. Once heating costs ...

There is almost no air leakage through the walls, so most Passivhaus buildings have a heat recovery ... the unit is in the actual suite, it can be "demand dependent" and deliver fresh air when ...

You can see how they work conceptually: a stream of air comes from the home through the heat exchange core, warming fresh ... recovery ventilation, this might be an acceptable alternative. Tiny ...

Dear Jim: I have an energy efficient house, which is fairly airtight. I installed new windows and doors. Now the indoor air does not seem as fresh as it used to, and odors linger. How can I get ...

An ERV (energy recovery ventilation) system has a special heat exchanger to also transfer moisture. During the summer, the incoming fresh air is partially dehumidified by the outgoing cool dry ...

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Dear Jim: The indoor air gets stale and too dry or too humid during winter and summer when we heat or air-condition. Is there any efficient way to get fresh air indoors without opening windows and ...

A dedicated outside air heat recovery system will provide fresh air ventilation, while a system of water source heat pumps will share heat within and across floors of the building to manage ...

Dear Jim: During winter when we heat or summer when we air condition, the indoor becomes stale. How can we get fresh air into the house without losing a lot of heat or letting in hot sticky humid air?

Warming up the incoming fresh air to provide the necessary ventilation keeps the internal atmosphere clean and the litter dry. Heat recovery units work by exchanging heat between stale air that is ...