| Prices | |
|---|---|
| Furnace Installation/Replacement | from $2000 |
| AC + Furnace Installation | from $4500 |
| AC + Furnace Replacement | from $3500 |
| AC Installation/Replacement of Existing Furnace | from $3000 |
Furnace Installation & Replacement in San Jose, CA
Professional Furnace Installation for San Jose Homes
Freon Service installs and replaces gas and electric furnaces in San Jose and nearby Bay Area cities. Every project starts with an in-home assessment and a heating load calculation, so your new furnace is sized for your home, not guessed from square footage. You get a written estimate before any work begins, and our team handles the permits, installation, and final testing.
When Do You Need a New Furnace Installation?
Replace your furnace when repairs keep adding up, energy bills keep rising, or some rooms stay colder than others. Age matters too: a furnace over 15 years old that needs frequent repairs is a candidate for replacement. A new furnace installation also makes sense when part of your home has no heat, such as a new addition or ADU.
Furnace Replacement in San Jose
A furnace replacement involves removing the existing equipment and installing a new system. We size the new unit, recommend the right model, disconnect and remove your old furnace, and complete the installation. Our techs also assess your ductwork, venting, and gas or electrical connections, so the new furnace works with what is already in your home.
Installing a Furnace Where There Isn’t One
Installing a furnace in a space without one starts with a heating load calculation and a check of the gas supply, electrical panel, and ductwork. If the space has no ducts, ductwork installation becomes part of the project.
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How Do You Choose the Right Furnace?
A heating load calculation sets furnace size. It accounts for square footage, insulation, windows, ceiling height, and air leakage. An oversized furnace short-cycles and heats unevenly; an undersized one runs nonstop. Beyond size, we compare fuel type, AFUE rating, your existing ductwork, electrical requirements, and the space where the furnace will go.
Gas Furnaces
Gas furnaces need a gas line with enough capacity and proper venting. High-efficiency condensing models vent through PVC pipe. We check gas line capacity, venting, and ductwork before quoting.
Electric Furnaces
Electric furnaces are a good option when gas isn’t available or practical. We still evaluate your home’s size, the capacity of your electrical panel, airflow needs, and thermostat compatibility before recommending electric furnace installation.
Furnace or Heat Pump?
Many California homeowners compare a new furnace with a heat pump before replacing their heating system. A heat pump heats and cools with one unit, while a furnace delivers strong heat on cold nights and often costs less to install. During the assessment we explain both options for your home. Learn more about heat pump installation.
What Does Furnace Installation Involve?
With our furnace installation services in San Jose, CA, we follow a clear process so your new equipment works with your home’s existing infrastructure:
- Assessment. We review your current heating setup, available space, utility connections, ductwork, and electrical capacity, and run a load calculation.
- Equipment selection. We recommend a furnace based on the load calculation, fuel type, efficiency goals, and budget.
- Permits. We handle the permits required for your furnace installation or replacement.
- Removal. For a replacement, our techs disconnect and remove the old furnace.
- Installation. We connect the new furnace to the ductwork, gas supply or electrical circuit, venting, and thermostat.
- Testing. We start the system, check gas pressure, airflow, and safety controls, and walk you through the new thermostat settings.
Most standard furnace installations are completed in one day.
Does Furnace Installation Include Ductwork Changes?
In many homes, we connect the new furnace to the existing ducts without changes. Whether your ductwork needs work depends on your current system and the new unit’s airflow requirements. During the assessment we check:
- Duct configuration: whether your home already has ducting and where it runs.
- Compatibility: whether the existing ducts match the new furnace’s connections.
- Airflow: whether the ducts can move enough air for the new unit’s capacity.
- Condition: leaks, crushed or disconnected sections, and worn insulation.
If changes are needed, they are listed separately in your estimate, so you know the full cost upfront.
Why San Jose Homeowners Choose Freon Service
5+
Years of Experience
1225+
Satisfied Clients
10+
Professionals
Experience and Expertise
Freon Service's technicians are highly experienced and possess the necessary expertise to handle a wide range of HVAC services.
Quality Workmanship
Freon Service is committed to delivering high-quality workmanship, ensuring that every project is completed to the highest standards.
Customer Satisfaction
Freon Service prioritizes customer satisfaction, providing exceptional service and ensuring that their customers' needs are met.
Frequently Asked Questions
Furnace installation or replacement starts at $2,000. The final price depends on fuel type, AFUE rating, BTU output, venting, and whether the ductwork or electrical connections need updates. Installing an AC and a furnace together starts at $4,500.
A standard furnace installation takes 4 to 10 hours, so most jobs are completed in a single day. Timing depends on the furnace type, access to the installation space, removal of old equipment, and any ductwork or connection changes.
Furnace size comes from a heating load calculation and is measured in BTUs (British Thermal Units). The calculation accounts for square footage, insulation, windows, air leakage, ceiling height, and local climate. Square footage alone gives only a rough number and can lead to an oversized furnace that short-cycles.
Yes, in many cases. We can connect the new furnace to your existing ducts as long as they are structurally sound, sealed, and correctly sized for the new unit’s airflow. If they aren’t, ductwork changes are priced separately in your estimate.
Installation adds a heating system where there isn’t one, such as a home addition or a new ADU. Replacement means removing an existing furnace and installing a new one in its place.
Replace the furnace if it’s over 15 years old and a repair would cost more than half the price of a new unit. Frequent breakdowns, rising energy bills, and uneven heating also point toward replacement. A technician can inspect the furnace and confirm whether a repair still makes sense.
Yes. Our team handles the permits required for furnace installation and replacement in San Jose and nearby cities.
It depends on your home, your current equipment, and whether you also need cooling. A furnace is often the lower-cost replacement when you already have gas and ductwork; a heat pump replaces both heating and cooling. We compare both options during the assessment.
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