How much does new furnace installation cost in San Bernardino?
80% AFUE entry-level $3,200-$4,500. 95%+ AFUE high-efficiency $5,500-$7,800 (SoCalGas rebates apply). Older Arrowhead or North Park homes may add $400-$800 for gas line resize and additional retrofit work.
My older San Bernardino home has small gas lines. Will I need to resize them?
Possibly. Pre-1970 Arrowhead and North Park homes often have 1/2-inch gas lines that work for older 80% AFUE furnaces but undersized for modern 95%+ AFUE condensing furnaces plus a tankless water heater. We measure delivered pressure during the quote walkthrough. Resize typically $400-$800.
Should I upgrade from 80% AFUE to 95%+ AFUE on my San Bernardino replacement?
Usually yes. SoCalGas rebates plus 15-20% annual gas savings typically pay back the upgrade within 5-7 years. The upgrade also eliminates the cracked-heat-exchanger CO risk that 1990s-era furnaces develop after 20+ years.
What rebates apply for new furnace install in San Bernardino?
SoCalGas rebates on qualifying 95%+ AFUE high-efficiency natural gas furnaces, citywide. Federal IRA tax credits expired Dec 31, 2025. We pull current sheets at quote time.
How long does furnace installation take?
Most residential installs are completed in one day. Major flue, ductwork, or gas line modifications can extend to two days.
What size furnace do I need?
Sized by Manual J heating load calculation, not square footage. Oversized furnaces short-cycle, stress the heat exchanger, and cause uneven temperatures. Try our
AC sizing calculator for a quick BTU estimate (most homes need similar heating + cooling BTU). We Manual J the actual home on the install consult.
What AFUE rating should I get?
AFUE measures combustion efficiency. 80% is the entry level. 90-95% qualifies for SoCalGas rebates. 96%+ has the lowest monthly bill but the highest upfront cost. We lay out the payback period at quote time.