Sizing & scenarios
6000 BTU mini split: room size, winter heat, availability
A 6000 BTU mini split fits 150 up to 250 sq ft on ENERGY STAR's AC table. Two listed 6k systems make 7,700 and 12,600 BTU/h of heat at 5°F.
Blog
Field notes between guide updates: warranty changes, price moves, and things we got wrong. Same verification rules, lighter reads.
Sizing & scenarios
9000 BTU mini split: what it covers, heats and needs
A 9000 BTU mini split fits 350 up to 400 sq ft on ENERGY STAR's AC table. Two NEEP-listed 9k systems make 7,300 and 11,500 BTU/h of heat at 5°F.
True economics
Are mini splits expensive to run? Cost per hour and month
Are mini splits expensive to run? At the 18.31 cent U.S. average rate, one example room costs about $0.23 an hour to heat. The formula, and your own rate.
Sizing & scenarios
Ducted mini split: static pressure, sizing and DIY limits
A ducted mini split hides its indoor unit above the ceiling. On the models we read, static pressure caps run 0.2 to 0.64 in. wg. Sizing and DIY limits.
Cold-climate performance
Heat pump defrost sensor: what it does and how it fails
A heat pump defrost sensor feeds the control board. Mitsubishi and MRCOOL manuals show what a fault looks like, and testing one is a licensed technician's job.