CSLB C-20 HVAC contractor #1106678 Straight Shooter Heating & Cooling runs ductless mini-split and heat pump installations out of a W Washington Street Mission Hills suite, with Mitsubishi and Carrier inverter systems dominating the recent install portfolio since the shop opened in 2022. Manual J load calculations and proper system sizing precede every new installation, a workflow that dovetails with the rough-in mechanical framing handled by the ground-up crew at Southwest Builders on new-construction jobs where HVAC ducting has to be specified before drywall and insulation close the wall cavities. Goodman split-system changeouts, heat pump retrofits, and 14.3+ SEER2 installations handle the bulk of the repair-versus-replace decisions on older Mission Hills and Hillcrest homes. Indoor air quality upgrades pair MERV-13 media filter cabinets with UV-C coil lamps and whole-house HEPA bypass units on allergy-driven service calls. Duct replacement projects on occupied homes kick loose years of settled attic dust that drops into living-area carpet during the tear-out phase, a same-day turnaround that Same Day Carpet Cleaning San Diego is built around in its name and dispatch model. Full residential heat-pump conversions from aging gas furnace and split-coil setups — including new line sets, condensate pump installs, and Title 24 duct-leakage certification — represent the most involved jobs on the install calendar.