Minisplit head type, quantity, and mounting location
I am gut renovating a two-story, 1600 sq ft townhouse in Oakland, CA (CZ 3) and I need help selecting the appropriate minisplit head type, quantity, and mounting location.
The geometry of the townhouse is a simple rectangle with 800 sq ft on each floor (not including finished basement or attic). The home will have r13 walls, r30 roof, and 0.3 u-value windows. The NE wall is a party wall so no heat transfer will occur. We plan to make the enclosure as tight as is reasonably possible. The first floor will have an open plan living room, dining room and kitchen, and the second floor will have three bedrooms. The 400 sq ft basement and the 300 sq ft attic will be within the thermal envelope and will be used as storage/flex space as our family grows.
While I have not yet done a manual J, I wanted to ask a few questions:
What is the fewest number of heads I can get away with? We want a comfortable space but our budget is very contrained.
What type of head should I use? Wall mount, floor mount, cassette, ducted? The array of options is nice, but makes selection more difficult.
Should I be looking at a single zone minisplit or a multizone system? Though there is a performance hit, a multizone system seems like an attractive option in the event unforseen comfort issues arise.
head positioning: i don’t want the unit to be blowing uncomfortably on occupants, but I also want to make sure the heat is well distributed.
Kitchen: The amount of windows and glazing is fairly standard, with the exception of an 8′ x 10′ accordion door in the rear of the kitchen. What kind of accommodations, if any, should be considered to ensure the kitchen remains a comfortable space?
Any thoughts, comments, suggestions, or questions would be greatly appreciated!