Yesterday we started a conversation about how an Heat Recovery Ventilation system will control the moisture in your home. Basically, the HRV will exhaust stale air from inside your home and bring in fresh air. The concept is really simple and I suppose you could accomplish the same thing by simply opening a window. But, when you open the window you are creating a huge hole in the building envelope and tons of warm air will escape. That would not be a good idea if you are trying to be energy conscious.
The trick or magic part of the HRV is that is has at its heart a Heat Recovery unit that extracts the warmth from the stale air and transfers it to the incoming fresh air that happens to be cold.
Some of the best HRV will recover 90% or more of the heat from the exhausted air prior to sending it outside. That really is an amazing accomplishment.
The photograph is yesterday’s blog shows an HRV unit that typically is installed in the basement and it connects to:
- Outside fresh air – the air handler imports fresh air from outside and after it goes through the Heat Exchanger it is blown into the home as warmed fresh air.
- Inside stale air – the stale air is exhausted outside; this air contains excessive moisture and odors.
As the stale air is exhausted its warmth is transferred to the incoming fresh air in the Heat Exchanger.
What you will see in the house are small round air diffusers as shown in today’s photograph. We have all seen these diffusers millions of times in virtually every commercial building.
The HRV is a silent piece of equipment that moves small amounts of air but constantly. Having an HRV in your home will become one of the house’s most treasured options.
Do you have an HRV, or do you want one? Give us a call and share your experiences, we would love to hear from you. Call us at 802.985-5855
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