Standard mini-splits typically keep heating down to about 5°F. Hyper-heat or cold-climate models use enhanced compressors to keep running at -13°F to -22°F and hold more of their capacity at 5°F. If your area's winter design temperature is below about 5°F and the mini-split is your main heat, pick a cold-climate model.
What changes
- Lowest operating temperature: about 5°F standard; -13°F to -22°F for hyper-heat.
- Capacity at 5°F: hyper-heat models keep much more of their rated output.
- Defrost and base-pan heaters keep the outdoor coil clear in snow.
- Price: cold-climate versions usually cost more.
Models we cover
The Senville AURA is rated to -22°F; the DELLA Optima and Cooper & Hunter 36,000 BTU to -13°F. Our cold-climate check lists every system by its stated limit.
Plan for the coldest days
Near its limit any heat pump delivers well under its rating. Keep a backup heat source for the coldest nights, and mount the outdoor unit above expected snow depth with a clear drain path.
Products mentioned
Senville AURA 9,000 BTU 230V
9,000 BTU · 28 SEER · heats to -22°F
DELLA Optima 12,000 BTU 230V
12,000 BTU · 24 SEER2 · heats to -13°F
Cooper & Hunter 36,000 BTU 230V Mini-Split
36,000 BTU · 19.5 SEER2 · heats to -13°F