Your question seems to indicate that youâÂÂre planning for perhaps 3 or more heating, cooling and ventilation systems. 2-HPs with perhaps 2-gas furnaces plus perhaps 2-HRVs PLUS a hydronic boiler for yet another system, in-floor radiant heating.

Hydronically heated floors can also be used for cooling too.

Are you planning to install a spa, whirl pool or in-ground pool? What about domestic hot water (DHW)?

Have you considered geothermal with only 1-highly integrated hydronic liquid-to-water geothermal heat pump system to do it all?

âÂÂThink waterâ for the whole system.

Pros:

MUCH lower operating cost
Greater efficiency
Less maintenance
Greater comfort
More zoning possibilities
No floor registers
Lower noise levels (Inside/Outside)
Longer life cycle
Higher resale value

Cons:

Higher first costs
Requires higher degree of design/install expertise

IMO

SR

I looked into geothermal, but the cost was over $90k-$100k range which was a little to pricey, plus we have a lot of rock so I likely needed vertical wells which would bump that price further. So geothermal is out.

I don't think we have heat pumps in the current plan. I am on natural gas. Since we live in Minnesota we will need furnace/ac anyways.

My understanding of the plan is 2 furnaces with 2 HRVs and 2ACs. One set for lower/main and one set for upper floor.

For water, we are using solo prestige 110 with a smart60 indirect water heater. Hopefully this should be enough to give us reasonable unlimited hot water.

I felt the HRV HE 2.6 were oversized but not entirely sure. Maybe the furnaces are too? We are have a 20 minute push bottom to two different laundry rooms for fresh air.

I think that there is some confusion from the use of "furnace". Often people refer to their boilers as furnaces. OP, you plan hydronic heat only, no forced air heat?

Both, plan to have radiant in floor heat in basement and all bathrooms. Forced all in basement, main, and upper.

Furnace, I mean forced air only. Bryant 95T series.

You should review the load calculation carefully. This is a big house and there are plenty of places to make mistakes.

What are the areas of the first floor and basement? The basement area presents very little load assuming it is below ground.

We have one bedroom on basement, one on main floor, and 3 bedrooms upstairs. Family room/rec room basement, then standard rooms on main floor.

Anybody else have a guess whether this looks about right?