HVAC Installation & Repairs in Union City, California

The biggest factors are the type of system, your home’s size, and the condition of the existing ductwork. Many Union City homes were built between the 1960s and 1980s, and older duct systems often need sealing, resizing, or replacement before a new high-efficiency HVAC system can perform properly. During our free in-home assessment, we inspect everything upfront and provide a detailed, itemized estimate with no hidden costs. Call (408) 733-2000 to book yours.

Most installations can be scheduled within a few days after quote approval. A standard central AC replacement usually takes 4–8 hours, while ductless mini split installations require about 3–6 hours per indoor zone. Projects involving new ductwork generally take 2–3 days. Since Union City is part of our regular Bay Area service area, we maintain flexible scheduling, and homes without heating or cooling receive priority service whenever possible.

It depends on your existing ductwork. If the ducts are properly sized and in good condition, adding a high-efficiency central air conditioner is often the most cost-effective solution. If the duct system is undersized, leaking, or difficult to upgrade—which is common in older Union City homes—a ductless mini split system offers excellent efficiency, independent room control, and eliminates energy loss through ductwork. We’ll evaluate both options and explain which provides the best long-term value for your home. Call (408) 733-2000 and we’ll inspect your setup and price both paths.

Yes. HVAC replacement projects in Union City typically require permits through the local building department. We help manage the permitting process and ensure every installation complies with California Title 24 energy standards as well as all local code requirements. Proper permitting helps protect your equipment warranty and simplifies future home sales.

Because Union City is one of our regularly serviced Bay Area communities, same-day appointments are often available, especially for calls received early in the day. Our service vehicles are stocked with many of the most commonly replaced HVAC components—including capacitors, contactors, igniters, and thermostats—allowing us to complete most repairs during the initial visit. Call (408) 733-2000 to check today’s availability.

Before making a decision, schedule a professional inspection. Systems that are around 20 years old are typically operating well beyond their expected lifespan, with declining efficiency and increasingly expensive repairs. If major components are nearing failure or repair costs approach half the price of a new system, replacement is usually the better investment. We provide honest recommendations and can also explain available California energy-efficiency rebates that may help reduce installation costs. Call (408) 733-2000 and we’ll give the system an honest health check with real numbers.

Routine maintenance is the key. Schedule AC maintenance each spring before warmer weather arrives, have your heating system inspected in the fall, and replace air filters every 1–3 months. Union City’s combination of warm summers, coastal airflow, and seasonal dust can gradually reduce system performance, so keeping the outdoor unit clean and maintaining at least two feet of clearance around it helps maximize efficiency and extend equipment life.

Air & Plumbing Systems is a fully licensed and insured California HVAC contractor (License #901246) with more than 25 years of experience serving Bay Area homeowners. Our certified technicians provide HVAC installation, replacement, repairs, ductwork, and preventive maintenance using high-quality equipment and industry best practices. Every installation is backed by our workmanship warranty, giving Union City homeowners reliable comfort and lasting peace of mind.