Best HVAC system and suggested improvements
My wife and I are seriously considering building a home on a large lot in a rural area near Rochester, NY (Zone 5). Our general plan is a single story house slab-on-grade house with a partially enclosed courtyard. It poses some challenges, because for its floor area, it has a large and long footprint. I’ve attached my rough plan for the house, with the hope that I can get some good insight from the GBA crowd.
I would like advice on how to efficiently heat, cool and ventilate it. I am concerned about keeping the heat running when the power goes out. Furthermore, I would welcome general suggestions on how to improve the design. I’m also curious if there are any efficiency standards that would be worth pursuing,
We’re building at the high point of a open mostly flat lot (a portion of a field). The courtyard opens southward. The best views are east and west. There are no nearby trees at present. There will be a detached garage south of the house.
Building on an EPS insulated monolithic slab.
Exterior walls are going to be R-40 double stud walls, air sealed at the WRB, with a rainscreen and wood siding.
The ceilings will be 10′ tall. Ceilings will be framed with 2x8s or 2x10s with a plywood air barrier above the framing. The attic floor will be covered with R-60 cellulose.
Roofs will be 4:12 shed roofs with ample overhangs. The roofs will slope away from the courtyard to reduce the snow and water that ends up there. The roofs will likely be framed with trusses held off the attic floor by 2x lumber around the edge.
Around the inside of the courtyard, a lower roof will protect a walkway.
The door between the family room and study will always be closed to keep pets out of the bedrooms.
The lot has no natural gas, but has lots of open space to install solar.
The kitchen will have a Stiebel Eltron mini tank water heater, and the bathroom off the kitchen will have a Stiebel Eltron mini tankless water heater. Everything else will get hot water from a large electric tank heater.
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