Do I really need an ERV?
Am installing a geothermal system. Have two quotes from contractors I have confidence in (IGSHPA certified, checked references). Both are quoting 5 ton ClimateMaster Tranquility 30.
The building is a sport court with 30' ceiling at peak, approx. 2,000 sq. feet. We live near Baltimore, MD, climate zone 4--mild. Building is super-tight. Spray foam + blown cellulose in walls (r30) & ceiling (r50).
One quote came in $6,000 more than the other, but included an ERV. Obviously, I liked the cost savings of the lower bid, but am worried it shows lack of design care, as, after reading on this site, it seemed an ERV would be a good idea, particularly since it is a sport court. I asked the contractor who underbid about this, and he suggested we could always add an ERV later, but that it didn't seem necessary to start with one. Thoughts?
Many thanks to all for everything I've learned here!