Heating & Air Conditioning in Union City, CA

What can we fix or install in your Union City home?

Whether something has stopped working or you’re planning an upgrade, start with the service that fits.

What’s going on	Where to start
Furnace won’t light, runs cold or makes new noises	Heating repair
Old furnace and AC both near the end of their life	Heat pump that heats and cools in one system
A room addition or upstairs that never gets comfortable	Ductless mini-split
Leaking tank or not enough hot water	Water heater replacement
AC tune-ups, repairs and replacements	Cooling
Dusty ducts or a slow dryer	Indoor air quality

You can browse every option under Heating and Water heaters too. Repairs start with an $89 diagnostic or service call, waived with an approved repair.

What do Union City homeowners ask us?

How do permits work in Union City?

Union City’s Building Division page offers over-the-counter permits by email for California state-licensed contractors, plus a separate owner/agent form. We use the contractor route, so you don’t need to stand in line at the city counter. The city also limits how many inspections it does each business day, so we call early to get yours on the calendar. When a new system needs HERS testing (a state-required check by an independent rater), we arrange that as well.

My home is in the hills east of Mission Boulevard. Does that change anything?

It can. The same Building Division page lists a Wildland Urban Interface zone east of Mission Boulevard, which is the area where homes meet open hillside land. Before we install outdoor equipment or new vents there, we confirm with the city what applies to your lot.

What climate zone is Union City in?

The Building Division lists Union City in Climate Zone 3. California’s energy code uses climate zones to set efficiency and testing rules for new equipment, so we size and spec your system to the zone your city lists.

Who is my electricity provider?

Ava Community Energy, which was East Bay Community Energy until its rename, includes Union City on its Who We Serve page. As of November 2026, Bright Choice is Ava’s default plan for Union City homes, while PG&E delivers the electricity and the gas. For a heat pump or heat pump water heater, start with Ava’s Savings & Incentives finder. Rebates come and go, so we won’t quote an amount here, but you may qualify; call us and we’ll check what applies to your home.

Have you done work near Union City?

Yes. Just north in Hayward, we replaced a furnace with a Carrier heat pump that now handles both heating and cooling. To the south in Fremont, we have posted a furnace replacement and mini-split maintenance.

Why choose a Milpitas company for Union City?

We have been a family-run heating and cooling company since 2002, working out of 743 Ames Ave in Milpitas. Look us up with the Contractors State License Board under license #1066776. Union City sits in our southern Alameda County area alongside Fremont, Newark and Sunol, and we serve Santa Clara and San Mateo counties too (every city we cover). Ask for any brand: we install Amana, Carrier, Payne, Goodman, Daikin and Mitsubishi.