Does Descanso's elevation change what kind of heat pump gets installed?
Yes. At 3,500 feet with genuine winter snowfall, a mild-climate heat pump loses too much heating capacity in real cold to keep a Descanso home comfortable through winter. We spec cold-climate-rated equipment, typically Mitsubishi Hyper-Heat or similar, which costs a few hundred to about a thousand dollars more than a standard unit but actually performs at Descanso's elevation instead of falling back on backup electric resistance heat.