Your current local a/c company can get you a Ultra-Aire system. Regarding winter humidity, ERVs recover a portion of moisture from the outgoing exhaust air, roughly 50%. They will dryout the home but require more operation than HRV, makeup air, or exhaust air.
Originally posted by nicholasa
Still trying to finish off this house.
(2 Bryant infinnity systems, and 1 april air ERV up stairs)
I am adding an Ultra-Aire Dehumid to the basement/1st floor system. can't find ANY local Ultra-aires, only April-aire units, guess I'll have to have 1 shipped.
My problem with the ERV's in general is that they "recover" indoor humidity in the winter, Not what I need in this tight house. BUT carriers ERV claims to remove humidity from the indoors in the winter too ???
As far as controlling make-up air, does any one make a controller with inddor and outdoor pressure sensors ?
So the fresh air damper would open only as needed ?
This being a tight house with UNVENTED cathedral ceilings, I donot want to over pressurize in the winter, thus forcing warm/moist interior air in contact with cool exterior surfaces, My aim is nuetral pressure.