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

[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.