Alpine has both extreme summer heat and winter freeze, what heat pump works?
For Alpine's dual-extreme climate, we recommend cold-climate-rated variable-speed heat pumps (Mitsubishi H2i, Bosch IDS Premium, Trane XL21i, or equivalent) that maintain rated heating capacity at low ambient temperatures. Standard heat pumps lose capacity below 35 degrees and may struggle during cold snaps with overnight lows in the 20s. Cold-climate-rated equipment maintains 80 to 100 percent of rated heating capacity down to 5 degrees, which covers any conditions Alpine sees including occasional snow at higher elevations. The equipment cost premium (typically $1,500 to $3,000) is worth it for reliable heating during winter cold snaps.