Heat Pumps in San Bernardino, priced up front.

San Bernardino is a heat-pump-friendly market for one specific reason: the city has a huge inventory of 1950s-1970s mid-century housing where the original gravity furnace was retrofitted into forced-air decades ago, then paired with a 10-12 SEER R-22 condenser in the late 1990s, and now BOTH pieces of equipment are well past 20-year service life at the same moment. Replacing them as separate boxes (new 95% AFUE furnace + new A2L condenser) is fine, but the all-in cost sits within $2,000-$3,500 of a single variable-speed heat pump that does both jobs and qualifies for in SCE rebates. The cracked-heat-exchanger CO risk that condemns 1990s-era 80% AFUE furnaces also goes away when you stop burning gas in the home. For households with someone with respiratory sensitivities (which is a real concern given San Bernardino air-quality history), eliminating combustion appliances is a meaningful health upgrade alongside the energy economics. Worth noting: cooler-night operation in the city is well within heat pump operating range, but high-altitude foothill neighborhoods like Verdemont and Del Rosa drop colder than the central valley, we size the unit's heating load against the coldest-week temperatures actually recorded at your address, not a citywide average.