HandpickedSplit-System
0 products · 1 buying guides
Handpicked Reviews
Picked and ranked by our editors. Published in Sep 2026.
Ductless mini-splits compared on BTU sizing, SEER2 rating, 115V versus 230V wiring and whether the unit heats in winter. Size by room first, brand second.
Buying Guides
Split-System FAQ
About 20 BTU per square foot, more for sunny or poorly insulated rooms. Oversizing causes short cycling and poor humidity removal.
Most are heat pumps and heat well until deep cold, where capacity drops. Check the rated heating output at your winter temperature.
115V suits 9,000-12,000 BTU units on a dedicated circuit; larger units need 230V and an electrician.
The current efficiency rating, tested at higher external pressure than SEER. A higher number means lower running cost.
You can mount the indoor unit, but the lines need vacuuming and charging, which needs gauges and a licence in many places.
Every two to four weeks in season. A clogged filter is the most common cause of poor cooling and icing.