Locating a High-Mounted Minisplit Head
Retrofit HVAC design was done a few years ago, manual J and all of the relevant stuff. 1400 sq ft first floor is simple, 9k and 18k ducted units with ducting in the encap’d crawlspace. Could likely also do a single air handler with zoning in the crawlspace. No work has been done yet.
The 2nd floor is our upstairs bedroom and a 8×9 master bath for a 440 sqft total. The bedroom ceiling is about 10.5ft in the middle, conceptually the same as a collar tie ceiling.
Equipment loads 4600 BTU heating, 3000 BTU cooling. 6k 1:1 ductless specified.
The only place for a high mount head is on the wall above the head of the bed, as there is a window at the other end of the room between the sloped ceiling sections. I think there is clear path to get the lineset down to the crawlspace and outside.
Noise from the high wall unit, either from the fan or from refrig in the lineset?
Air throw into the attached bathroom, with the doorway in one of the long perpendicular walls?
Cleaning and filter maint above the bed (move the bed to clean the filter)?
The only other easy-ish option is a cassette in the middle of the room, which would solve any issues with throw into the bathroom, but would need a rather oversized 7k cassette and a multi-split config. I’d probably need to make a dropped soffit to make that happen, with the installation depth and air sealing/access.
I have thought about a single phase VRF because of the different 4k/5k/6k ductless/ducted/cassette options (entire house on a 36k outdoor unit), but don’t have any intuition on how this would compare for price.
We’re already having problems with high quotes or getting quotes at all, because quotes are a serious struggle for anything around here. Business is very good, and getting anyone to followup is hard.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part