Heating & Air Conditioning in Fremont, CA

What heating and cooling work do Fremont homes need most?

In Fremont, most of our calls are about replacing an older furnace or AC, adding a heat pump, or fixing ducts that leak air into the attic. Here is how we help, from a quick fix to a full new system.

• Cooling: repairs, tune-ups and AC replacement with a free written estimate.
• Heating: furnace repair, heat pumps and duct repair and replacement.
• Water heaters: tank, tankless and heat pump models.
• Indoor air quality: air duct cleaning and dryer vent cleaning.
• Mini-split maintenance for ductless systems that have lost airflow.

What have we done in Fremont?

Three recent Fremont jobs from our project log:

• Furnace replacement: an old, inefficient furnace swapped for a high-efficiency model, tied into the home’s existing ducts and thermostat, then tested for airflow and safe operation.
• Mini-split maintenance: a ductless system serviced to bring back steady airflow and cooling.
• Dryer vent cleaning: built-up lint cleared from the vent line, with before-and-after photos.

We have also written two guides for Fremont homeowners: one on duct sealing and one on central AC installation.

What do Fremont homeowners ask us?

Does replacing a furnace or AC in Fremont need a permit?

Yes. The City of Fremont has a Residential HVAC express permit on its permit types page. It covers installing a furnace, wall heater, AC or mini-split, or replacing one in the same spot, plus duct and vent replacement. Express permits are applied for online through Citizen Access and issued automatically. A replacement water heater in the same spot falls under the city’s Residential Plumbing express permit.

Will the city inspect the work?

Yes. Fremont’s Planning and Building Permits page says every permit requires a building inspection. We apply for the permit, meet the inspector, and handle any HERS testing (an independent check the state energy code requires on many new systems).

Who supplies my electricity, and are there heat pump rebates?

Ava Community Energy, formerly East Bay Community Energy, lists Fremont on its Who We Serve page. As of November 2026, that page shows Renewable 100 as Ava’s default plan for Fremont homes. PG&E still delivers the power and supplies gas. Ava’s Savings & Incentives page has a finder for rebates, tax credits and discounts. If you are switching to a heat pump or a heat pump water heater, you may qualify; call us and we’ll check what applies to your home.

Your project in Fremont	What the city uses	Who handles it
Furnace, AC or mini-split install or same-spot swap	Residential HVAC express permit	We file it and book the inspection
Duct or vent replacement	Residential HVAC express permit	We file it and book the inspection
Water heater replaced in the same spot	Residential Plumbing express permit	We file it and book the inspection
New construction or larger remodels	Regular building permit	We coordinate with your builder

Why do Fremont homeowners call us?

We are a family-owned shop at 743 Ames Ave in Milpitas, just over the county line, and we have done heating and cooling work in Fremont since 2002. Our license is CSLB #1066776. Besides Fremont, our crew covers Newark, Union City and Sunol in Alameda County and many more cities in Santa Clara and San Mateo counties; see all our service areas. We install the brand you prefer, whether that is Amana, Carrier, Payne, Goodman, Daikin or Mitsubishi, and every quote for a new system is free and in writing.