Hesperia is one of the top 4 HVAC install markets in the High Desert because so many homes built 1995-2010 are now reaching the 15-25 year replacement window. Original 4-ton splits running R-22 refrigerant have hit end-of-life on compressors and coils. R-22 is no longer manufactured, which forces a real choice: minor leak with reclaimed R-22 (works for now) or full replacement with current R-454B (A2L) systems that qualify for SCE rebates. We do Manual J load calculation on every Hesperia install because square-foot rules consistently oversize tract homes here. The original builder-grade 4-ton system was probably oversized to begin with, and replacing it with another 4-ton repeats the mistake. Our quote includes side-by-side options across two or three equipment tiers so you see the upfront vs monthly bill trade-off honestly.