Is a HRV the way to go?-installed/update

[bkelly]

yes the calculators can go by sq foot or average home size base on 3-4 bdr etc. for getting an idea on size of HRV needed, mine was for a standard 3 bdrm home. although i got the size up. Got it through Coral in Kelowna. saved $1500 installing myself. Didnt go for the grants, didnt get the inspections before and after, seemed not much left after. We were in a rush to save the home from damage.

[rayjay]

In my case I spoke with the engineer for Lifebreath here in London where they are made, and he took the square footage of the house, the year it was built, extra insulation of any kind added after the build, and then wanted to know the surface area and temperature of all the open water in my house, to come up with an accurate determination.

[mark]

Originally Posted by rayjay

In my case I spoke with the engineer for Lifebreath here in London where they are made, and he took the square footage of the house, the year it was built, extra insulation of any kind added after the build, and then wanted to know the surface area and temperature of all the open water in my house, to come up with an accurate determination.

much difference from the regular formula for the 0.35 air changes an hour (sqft x height / 60 x 0.35 to give CFM)

[rayjay]

The reason for it was circumstances not normal to most houses.
I had over 1000g of open water in my basement with all the tanks, the brine shrimp operation, nanno culturing and ageing water vessels.
Simple formula just wouldn't cut the mustard.
Also, when I got mine there were hardly any contracters that even understood HRV's and ERV's.
Most of them tried to sell me ERV's which don't work well below -5°C.

[bkelly]

I found that too, the two i talked to in Kelowna didnt know much and what they did new was with HRVs for new homes, I knew what i wanted from Canreef mostly but listened to them and we figured it out.

[mark]

Originally Posted by rayjay

The reason for it was circumstances not normal to most houses.
I had over 1000g of open water in my basement with all the tanks, the brine shrimp operation, nanno culturing and ageing water vessels.
Simple formula just wouldn't cut the mustard.
Also, when I got mine there were hardly any contracters that even understood HRV's and ERV's.
Most of them tried to sell me ERV's which don't work well below -5°C.

most of use aren't normal so why was asking . Could you work backward, for how many air exchanges per hour was recommended?

[rayjay]

As I don't have the knowledge to properly determine I left everything up to the engineer. I would have no idea as to being able to work it backwards because there are so many variables from home to home.

[StirCrazy]

you guys do all realize that the freeze up problems with ERVs were solved years ago, Although companies still state this to sell there HRV's.... but I do agree for this situation a HRV is probably good.


Steve

[mark]

Originally Posted by rayjay

As I don't have the knowledge to properly determine I left everything up to the engineer. I would have no idea as to being able to work it backwards because there are so many variables from home to home.

Simply for number of air exchanges, how many square feet is you house, how high the ceilings, CFM rating of your HRV?