Using one minisplit head (wall unit) for two small rooms
Currently I have a ducted HVAC in my urban rowhouse condo (495 sq. ft total, living room is about 220 and bedroom 180), I have long wanted to install ductless A/C & heat to remove the large duct hanging from my living room and kitchen ceiling and give me an extra closet (worth about $100-$150 month to me). That old system finally died.
Installing ductless in the bedroom is not as easy as I thought – there is limited space above the ceiling &it’s a historic facade; condensate will have to go through the entire wall of my apartment to the back.
I have been given the following solutions by three contractors:
A) 12,000 BTU outdoor unit + one head in the living room [$6250]. The one wall unit would be placed on the back wall of the living room, pointing straight towards the door of the bedroom 12 feet away
B) 24,000 BTU outdoor + one unit in the living room, if it’s uncomfortable I then have the option to add a bedroom unit later without buying a new outdoor unit [$7,500 now + $2,500 or so- later]
C) 24,000 BTU outdoor & one head in each room, run pipes from the bedroom unit through holes drilled in the studs of the wall to the back deck [$9,500], insulate the pump with foam so the noise doesn’t bother me.
I am concerned about the pump being noisy & also having pipes embedded in the wall in case of issues/leaks so I really want Option A to work (if it doesn’t I may just drop the idea of ductless). Is it crazy to think one wall unit would cool both rooms?
I don’t care much about temperature differences – usually only one room is in use at a time, & the door open. The current ducted system has always had a big difference between rooms, the air basically passes 12 feet through the hot attic crawl space before reaching the room.
Would Option B work? Or would a 24000 BTU be so oversized for this space that it would short cycle and damage the system? It would be nice to have the option if I need it later/sell. If it is technically feasible I would go with this.
Thanks so much for your suggestions. It’s difficult to decide with HVAC guys telling me different things.