HRV's

[John Allingham]

Originally Posted by clawrenson

Mario offers good advice.
If you have a new 2006 code check out 9.23.3 Mechanical Ventilation

If you want some good information on HVAC systems download the following document from CMHC.
https://www03.cmhc-schl.gc.ca/b2c/b2.../pdf/62015.pdf

Good info - I use it for my HVAC course.

It's 154 pages! Here's the link for cheap guys like me that would rather have it mailed out.
https://www03.cmhc-schl.gc.ca/b2c/b2...01230000000034

[Vern Mitchinson]

Yuri care to explain the difference between hrv and erv?

[David P. Valley]

Originally Posted by vmitchinson

Yuri care to explain the difference between hrv and erv?

Vern,

Here's a link that'll explain the difference between the two.


http://www.xpedio.carrier.com/idc/gr...v00-042104.pdf

[Claude Lawrenson]

Thanks David - good points:

If you live in a colder climate with a longer heating season such as Canada or the northern US, the HRV will provide the most comfort and efficiency.

In the midwest and southern states, where humidity removal is neededf or the incoming air, an ERV provides year-round efficiency.

[Yuri Olhovsky]

Originally Posted by vmitchinson

Yuri care to explain the difference between hrv and erv?

Vern, David V. gave you a good link and Claude summed it up nicely. I said that ERV is better for Southern Ontario because we really have somewhat equal amount of cold and hot weather. We use almost equally furnace and AC. HRV does nothing for helping AC, but ERV helps it a lot by removing latent heat. In winter ERV removes humidity as well and goes through the same defrost cycle as an HRV does. HRV is much more effective in removing humidity, but if the family and the house are small, ERV does pretty good job. I can tell you that I have many phone calls from people complaining about having frost at the bottom of their newly installed windows when the temperature is low outside. I know from my own experience that the problem is not in the windows. Once you put an HRV in the house, condensation is no longer a problem.