Rialto furnace install work is heavily replacement-driven because most of the city is 1960s-2000s tract construction with much of that equipment now at or past replacement age. Central and south Rialto homes built 1960s-1980s commonly still run 80% AFUE gas furnaces, well past 20-year service life with cracked heat exchanger risk. Replacement-with-upgrade to 95%+ AFUE wins on SoCalGas rebates, gas savings, and safety. North Rialto newer subdivisions (1990s-2000s) usually run 90-95% AFUE condensing equipment already and replacement is straight equipment swap. Foothill Boulevard light commercial install is its own category, rooftop unit (RTU) heating section installs and replacements for retail, fast food, small offices.