HVAC Installation & Repairs in Stanford, California

It depends on what your home needs: system type, square footage, and whether the existing ducts can stay in service. Sunnyvale’s mix of 1950s–60s ranch homes and newer townhouses means quotes genuinely differ street to street. Call (408) 733-2000 to book your free assessment.

Days, not weeks. Once you approve the quote, a central AC replacement takes 4–8 hours, a mini split runs 3–6 hours per zone, and projects adding new air conditioning ductwork take 2–3 days.

Check the ducts first. If your ranch home’s original ductwork is sound, modern central AC at 15–18 SEER2 (California’s current minimum for most new installations is 14.3 SEER2) cools the single-story footprint evenly and cost-effectively. If the ducts are leaky or the home never had them, ductless mini splits at 20–27 SEER2 sidestep the 20–30% duct losses and zone each room independently — often the stronger long-term investment. Call (408) 733-2000 and we’ll inspect your ducts and run both scenarios.

Yes — as everywhere in California. We assist you with the permit paperwork and walk you through the documentation steps, and every system we install is built to California Title 24 energy codes and local requirements, so the inspection goes smoothly. Documented work keeps your warranty intact and prevents headaches when the home changes hands.

Each truck stocks the parts behind most failures (capacitors, contactors, igniters, thermostats), meaning most repairs finish on the very first visit. Call (408) 733-2000 and the dispatcher will confirm the earliest arrival for your address.

Annual “limping” is the tell. Systems past 10–15 years that need help every season are spending your money twice — on repairs now and on wasted energy daily. The threshold is simple: one repair above 50% of a new unit’s cost, or two breakdowns in a season, and upgrading wins. A high-efficiency replacement cuts bills and may qualify for California rebates. Call (408) 733-2000 for an honest verdict with real numbers.

Spring AC tune-up, fall heating check, and filter changes every 1–3 months. Sunnyvale’s dry summer dust and year-round landscaping debris settle into outdoor condensers steadily, so a quick monthly look at the unit pays off.

Air & Plumbing Systems is a fully licensed and insured California HVAC contractor (License #901246) with over 25 years of experience, headquartered right here. Our certified technicians handle air conditioner installation, ductwork, repairs, and maintenance — backed by a workmanship warranty, serving Sunnyvale, Santa Clara, Mountain View, and the surrounding Bay Area.