This page contains the list of equipment I hope to be using in the house.
Heating system: Pioneer Ductless Wall Mount Mini Split, one per room for 3 total. Likely getting the 120V, 12000 BTU version. Manual located at https://www.highseer.com/pdf/WYB_IM.pdf. 20 amp circuit for each.
Water heater: Stiebel Eltron ACC300 Accelera 300. 80 gallon water heater. 79 inches tall. Should be installed in attic, because it will cool and air condition the room that it’s in. Manual located at http://www.stiebel-eltron-usa.com/sites/default/files/pdf/install-accelera-300.pdf. Requires a 220v, 15 amp breaker. Must be installed in a room that is at least 800 cubic feet. (Attic will easily meet that.) At least 2 feet from the wall on the air intake side and 6 feet from the wall on the exhaust side. At least 8 inches from the wall on the non-air sides.
Bathroom fans: Delta BreezRadiance RAD80L with light and heater. 80CFM. See sizing notes at https://www.efi.org/factoids/bathroom_sizing.html. 80CFM is plenty for bathrooms of that size. Manual at http://www.deltabreez.com/Upload/SalesBinder/5_IM/5_Radiance/RAD80L_IM_e.pdf. Requires a dedicated 20 amp GFCI circuit. Should be installed within 5 feet or shower head for minimal heat loss while having maximum ventilation. Can either have a wall vent on a roof vent. I think wall might be simpler, and it might make sense to drop the bathroom ceilings from 9 feet to 8 feet, and run the duct work through the false ceiling and out the wall. Requires 3 switches. Here is a 3-switch in a single unit.
Laundry-room fan: Panasonic FV-04VE1 WhisperComfortTM Spot Energy Recover Ventilator. Manual located at http://www.manualslib.com/manual/305650/Panasonic-Fv-04ve1.html. Requires 2 ducts. Ducts should be insulated to avoid condensation. Duct outlets must be at least 3 feet apart. Intake air duct must be at least 6 feet from dryer duct outlet. Requires just 0.15 amps at maximum power, so it could run on a shared circuit.