A cold-climate heat pump is an air-source heat pump engineered to keep delivering substantial heating capacity and efficiency at low outdoor temperatures, commonly verified at -15°C (5°F). It typically uses a variable-speed inverter compressor and enhanced refrigerant controls, so it relies far less on backup heat than standard models during freezing weather.
Why it matters to you
Fraser Valley winters are usually mild, but cold snaps and outflow winds do push temperatures well below freezing for days at a time. A cold-climate model keeps more of your heating on the heat pump during those stretches instead of handing it to backup heat.
Practical guidance
Ask for the unit's rated capacity at low outdoor temperatures, not just its nominal size, and compare that against your home's heat loss on a design cold day. A cold-climate unit still needs correct sizing and clear drainage at the outdoor pad to perform as rated.