HVAC Installation & Repairs in Los Altos, California

The price is shaped by the system type, your home’s size, and whether the existing ductwork can stay. Many single-story Los Altos homes on larger lots need longer duct runs or multiple mini split zones, which we factor into a clear, itemized estimate before any work begins — no hidden fees. Call (408) 733-2000 for a free consultation and an exact quote for your home.

After the free on-site assessment and equipment selection, the installation itself is fast: 4–8 hours for a central AC replacement, 3–6 hours per zone for a mini split. Projects with new air conditioning ductwork take 2–3 days. Permit processing runs in parallel, so most homeowners go from signed quote to cool air within days, not weeks.

More and more do — heat waves are pushing even the mild Los Altos microclimate into the 90s several times a summer, and many older homes here were built without cooling. Modern central AC delivers 15–18 SEER2 (California’s current minimum for most new installations is 15.2 SEER2) and suits homes with existing ducts. Ductless mini splits reach 20–27 SEER2, avoid the 20–30% of energy that can be lost through ductwork, and install cleanly in homes that never had ducts at all. Call (408) 733-2000 and we’ll recommend the right fit for your home.

In most cases, yes — Los Altos is within our core service area, and same-day repair visits are usually available, with morning calls getting the earliest slots. Whether the AC quit before a heat wave or the furnace won’t fire on a cold morning, call (408) 733-2000 and our dispatcher will confirm the fastest arrival time for your address.

Look for age past the 10–15 year mark, repairs that keep recurring, energy bills creeping up without a change in usage, and uneven temperatures between rooms. When a single repair quote crosses 50% of a new unit’s price, replacement is usually the wiser spend — modern high-efficiency systems lower bills and may qualify for California rebates. Call (408) 733-2000 and we’ll give you an honest repair-vs-replace breakdown during the diagnostic.

Two visits a year: an AC tune-up in spring and a heating check in fall. Los Altos properties with mature oaks and heavy landscaping see condensers fill with leaves and pollen quickly, so keeping the outdoor unit clear between visits matters. Swap the air filter every 1–3 months — it protects airflow, efficiency, and the lifespan of the whole system.

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 — with workmanship backed by warranty, serving Los Altos, Mountain View, Palo Alto, and the surrounding Bay Area.