Ductless minisplit location? Remote thermostat?
I’ve read a number of complaints about ductless mini splits not accurately maintaining the set temperature. The most common reasons cited are the fact that the thermostat is contained within the unit, and the unit is too close to the ceiling, resulting in the air temperature sensed is higher than the ambient air in the room.
If a remote thermostat is used, does this mean you don’t have to worry about ceiling clearance (of course still observing installation instructions)? Conversely, if you keep the unit well away from the ceiling, does this mean you probably don’t need the remote thermostat?
I originally planned for the unit to go about a window beside the kitchen. This would put the top of it about 5″ below the ceiling (8’6″ ceiling height). I also have the option of putting it beside the window, which would allow it to be lowered about a foot. It would mean re-routing some wires and cutting another hole in the drywall, which is some work but doable. Obviously don’t want to do it needlessly. I’ll attach a drawing showing the options. The house is super insulated, and I haven’t noticed any air stratification.
The unit I plan on having installed is the Fujitsu 9RLS3. Is there a wireless remote sensor option for this unit? Running wires to a suitable location on the wall would be a pretty substantial job. I do plan on calling Fujitsu, but the other time I called them I got mediocre results. Their website is essentially useless for this level of detail. The installers in my area have little, quite possibly zero, experience with both Fujitsu specifically and ductless in general, so it’s my job to sort this stuff out in advance.