HRV with Dehumidifier and radiant floor heating
Need some clarification on HRV and dehumidification on an atypical new residential construction.
The new house is 3600 sqft split evenly between basement, first, and second floors. The house will be extremely tight and well insulated with SIP panels (e.g. R42 walls/roof, ICF basement walls, 6" rigid foam in the basement floor), so it doesn't require a lot of energy to heat or cool (25% of a standard sized home). The heat will be provided by radiant heating, and there are no plans for air conditioning. Therefore, there is no central air handler.
However, since the house is so tight, an HRV with ductwork is mandatory.
Even though the house is tight, there is nothing to prevent humidity from coming into the house; so it was assumed that a dehumidifier would be needed to take out some of the moisture in the humid summers. A portable unit is not going to cut it, so is there some way to hook up the dehumidifier directly to the HRV, so that they share the same ductwork or should it just remain two distinct systems due to different air flow requirements and usage patterns?
Agreed the lack of air conditioning is a bit whack
The lack of air conditioning is a bit whack, I know - but it's a personal preference more than anything and the way the house evolved.
The house has been designed to make the house as comfortable as possible during summer (overhangs to limit solar gain, cross ventilating windows, whole house fan, reflecting metal roof, etc) - we even made the screen porch big enough for sleeping outside, but we know that we'll still have uncomfortable days in summer when day time temps reach 95 and the humidity is high. And all those tricks won't prevent the internal heat sources from warming up the house.
For us the key is less about the daily high, but the nightly low ... if it cools off enough at night, it can cool the house before closing it up during the day - counterintuitive, I know, but those crazy Europeans having been using that trick for centuries.
But even then, I'm not deluding myself into thinking a bit of cooling would be welcomed, but putting in a wall unit or mini-split is a whole lot different than going with the central air conditioner.
Stay tuned, once the house is built and we've lived through an Indiana summer, I'll post the findings.