HVAC Installation & Repairs in Sunnyvale, California

Our rates don’t change by city — the quote reflects your home, not the address. System type, square footage, and duct condition set the price. Union City’s tract homes from the 1970s–80s often still run their original ductwork, and whether it needs sealing, insulating, or replacing is exactly what the free on-site assessment answers before you see an itemized quote with no hidden fees. Call (408) 733-2000 to schedule yours.

Often, yes — many Union City homeowners let us in at the start of the day and come home to a running system. A central AC replacement takes 4–8 hours, a mini split runs 3–6 hours per zone, and ductwork projects take 2–3 days. We just need someone to grant access at the start and be reachable by phone; the final walkthrough and system training can be scheduled for when you’re back.

The upstairs-hot, downstairs-cold problem is a zoning problem. Ductless mini splits at 20–27 SEER2 solve it directly — each floor gets its own unit and thermostat — while avoiding the 20–30% of energy ducted systems can lose through ducts. A zoned central AC at 15–18 SEER2 (California’s current minimum for most new installations is 15.2 SEER2) achieves similar balance where healthy ductwork exists. Call (408) 733-2000 and we’ll design the setup that evens out your floors.

A permit is required, and we make it painless: we assist you with the permit paperwork and guide you through each documentation step, while building every system to California Title 24 energy codes and local requirements so the inspection passes cleanly. Properly documented work protects your equipment warranty and avoids surprises during a future home sale.

Yes — Union City is part of our regular East Bay coverage, and same-day slots are usually available, with morning callers getting the earliest windows. Our trucks stock the parts behind most breakdowns (capacitors, contactors, igniters, thermostats), so the majority of repairs are finished on the first visit. Call (408) 733-2000 and the dispatcher will confirm today’s fastest arrival for your address.

Loudly. That repair cadence on a system past 10–15 years means components are aging out together, and each fix buys less time than the last. Add up what you’ve spent: if the total — or any single upcoming repair — crosses 50% of a new unit’s price, replacement is the financially sane move. A modern high-efficiency system trims monthly bills and may qualify for California rebates. Call (408) 733-2000 and we’ll lay out both paths with real numbers.

An AC tune-up in spring, a heating check in fall, and filter swaps every 1–3 months. Union City’s spot between the Bay and the East Bay hills brings breezy, dusty stretches that load outdoor condensers with debris — a monthly glance at the unit and keeping shrubs trimmed two feet back preserves airflow. Consistent upkeep is the cheapest insurance against a mid-heatwave breakdown.

Air & Plumbing Systems is a fully licensed and insured California HVAC contractor (License #901246) with over 25 years of experience. Our certified technicians handle air conditioner installation, ductwork, repairs, and maintenance — backed by a workmanship warranty, serving Union City, Fremont, Newark, and the surrounding Bay Area.