[Tim Hancock]

My wife and I are empty nesters now so two of the three bedrooms are rarely used. All three bedrooms are on the upper floor of our split level house. All three bedrooms are around 160-200 sq ft each. The 9k units were the smallest available from Bosch to use with my system.

It can get well into the 90's with high humidity in Ohio in the summer. It can get down to sub zero temps in the winter but typically in recent years winter temps probably average mid 30's day time and mid 20's nighttime. Our units have worked fine both winter and summer. If it ever got crazy cold for several days (like -10 degrees and windy, I am not sure how the units would do, but we still have our old electric ceiling and baseboard heat that works but is less efficient than these inverter style mini-splits.

The 9k keeps our bedroom any temp we want it summer or winter. It and one other seldom used spare bedroom is connected to one of the 18k outdoor units. We like it chilly so we typically have it set at 65 degrees in the summer. My wife sometimes shuts it off in the middle of the night. Either way she rarely leaves it run during the day. During the summer she typically turns it on again about 8:00 or 9:00pm and when we go to bed at 10:00 to 11:00pm it is 65 degrees always. If we leave all three bedroom doors open along with a small bathroom, I believe that one 9k indoor handler could keep the whole upstairs cool. I just wanted the capability to have privacy for ourselves and any guests who might occasionally visit.

Our downstairs living area is an open split level area.... kind of hard to come up with the sq footage. At least 600 sq ft for kitchen/dining/family room along with another few hundred for our living room which we do not ever really spend time in. Our 12k indoor handler is on the wall in our family room but is fairly close to our kitchen/dining room that is 1/2 floor up with an open architecture. This unit along with the other spare bedroom is powered by our second 18k outdoor unit. We spend all our time in the family room and a bit in the kitchen. Both areas stay as cool as we want them to be all summer long. We usually leave this downstairs unit set at 70-72 degrees year round.