Single point source heating with ductless minisplits worked for us in Minnesota (Zone 6A)
Not really a question
Just wanted to post to the Q/A that we successfully heated our entire house with a single head ductless minisplit. Firstly, in the build we had issues with HVAC people who didnt want to do our single point source heating, until they got sick of our persistence and gave in. Then we had issues with the code inspector who made us put in electric wall heaters in all rooms of the house except where the minisplit head unit was. We stood there with the guy trying to argue our points and case studies, but he just kept coming back to “whats going to happen when someone closes a door….. your pipes are going to freeze”. Round and round until we gave in and put in the wall heaters. Anyhow…. we survived the polar vortex with our Mitsubishi Hyperheat just fine, and only turned it off one night when it got to -30 F and coasted on the residual energy in the slab on grade till it warmed up to -15 F the next day. So everyone get out and advocate for building energy efficient and educating HVAC and building inspectors what is possible.
Also wanted to thank Green Building Advisor, as we relied on this website heavily when we were designing our home.
2 X Indoor units MSZ-FH18NAH (one for heating one for cooling)
R-35 Double Stud Walls
Open Cell Spray Foam
2/3rds slab on grade, 1/3 basement