Furnace installation in San Jose, CA
A new gas furnace installed in San Jose typically costs about $5,500 to $8,200 for common 60,000 to 100,000 BTU sizes, depending on efficiency, venting and ductwork. We size the furnace to your home, handle the permit, and install it safely.
Because the Bay Area's rule on new gas furnaces starts in 2029, we also walk you through the heat pump option before you decide. Emergency service is available 24/7.
Quick answer: what does a new furnace cost in San Jose?
Average installed prices in San Jose from our pricing guide are about $5,500 for a 60,000 BTU furnace, $6,800 for an 80,000 BTU furnace and $8,200 for a 100,000 BTU furnace. Higher efficiency models cost more, and extras like new venting, gas line work or ductwork repair add to the total.
Details are in our furnace installation pricing guide.
| Furnace size | San Jose average installed |
|---|---|
| 60,000 BTU | $5,500 |
| 80,000 BTU | $6,800 |
| 100,000 BTU | $8,200 |
Examples of our work
Important: the Bay Area rule on gas furnaces
The Bay Area Air District adopted Regulation 9, Rule 4 in 2023. It sets a zero NOx emissions standard for new gas furnaces sold and installed in the district, effective January 1, 2029.
Santa Clara County is inside the district, so San Jose homes are covered. Here is what that does and does not mean:
- It does not require you to remove a working furnace.
- It does not apply to gas stoves or cooking appliances.
- After the effective date, a replacement furnace must meet the zero NOx standard, and the products that meet it today are electric, such as heat pumps.
- The Air District said its board would consider flexibility amendments in 2026, so the timeline could change.
Check the Air District for the date that applies when you replace. San José Clean Energy summarizes the policy on its appliance policy page.
If you are choosing a furnace today, you are still allowed to install a compliant gas model, but it is wise to think about the next replacement, too.
Is it time to replace your furnace?
Replacement is worth pricing when several of these are true:
- The furnace is 15 or more years old.
- It needs repeated repairs.
- A heat exchanger crack was found. A furnace with a cracked heat exchanger should not be used.
- Heating bills are rising or some rooms stay cold.
- Your air conditioner is also old, and you would rather replace both at once.
How a furnace installation works
- We look at your home. We check the existing furnace, venting, gas line, ducts, thermostat and where the furnace sits.
- We size the furnace. Capacity should come from your home's heating needs, not from the old furnace's size. An oversized furnace short cycles and heats unevenly.
- You get the options and prices. We explain efficiency levels, whether a heat pump suits your home, and the cost of each, before any work begins.
- We handle the permit. Replacements in San Jose generally need a permit from the City of San José, and California's energy standards can add duct testing and sealing steps.
- We install and remove the old furnace. That includes venting, gas connections, electrical and the thermostat.
- We test it and walk you through it. We confirm it heats safely, check the venting and combustion, and show you the filter and thermostat.
Choosing an efficiency level
Furnace efficiency is rated in AFUE, the share of fuel that becomes heat. Higher ratings cost more up front and use less gas. Typical price steps from our pricing guide:
| AFUE rating | Tier | Added to base price |
|---|---|---|
| 80 percent | Standard efficiency | Base price |
| 90 to 92 percent | Mid efficiency condensing | Add $400 to $900 |
| 95 to 96 percent | High efficiency | Add $900 to $1,800 |
| 97 to 98 percent or more | Premium modulating | Add $2,200 to $4,000 |
Because San Jose winters are mild, you run the furnace fewer hours than in colder places, so the highest efficiency tier takes longer to pay back. Ask us to compare operating costs for your home, using current PG&E gas rates.
Furnace or heat pump?
A heat pump heats and cools from one system, and it is the equipment type the Bay Area's rule points toward. For many San Jose homes, replacing a failing furnace and an aging AC with one heat pump makes sense.
A heat pump may need an electrical panel with enough capacity, and a duct system in good condition, so we check both. See heat pump installation in San Jose.
Rebates and incentives
A furnace is not what the California heat pump rebates pay for. HEEHRA is for heat pump HVAC, and it is closed to new single family reservations.
If you decide to go electric, read our California rebates and rules guide before you sign anything. For a gas furnace, ask us about utility programs that apply at your address.
Where we install furnaces in San Jose
We serve homes across San Jose, including Willow Glen, Almaden Valley, Rose Garden, Naglee Park, Hanchett Park, Silver Creek Valley, Cambrian Park, Evergreen, Berryessa and the Santana Row area.
See furnace repair in San Jose if you are deciding between repair and replacement, and HVAC in San Jose for the full picture.
Brands we service
We repair and install all major brands. Each brand page lists the models we install, the problems we see most and what the warranty typically covers. See how we match a technician to your brand.
San Jose, CA on the map
Common questions
How much does a new furnace cost in San Jose?
Average installed prices in our guide are about $5,500 for 60,000 BTU, $6,800 for 80,000 BTU and $8,200 for 100,000 BTU. Efficiency, venting and ductwork change the total.
Can I still install a gas furnace in San Jose?
Yes. The Bay Area Air District rule for new gas furnaces is set to take effect January 1, 2029, per its adopted rule. The board was to consider flexibility amendments in 2026, so check the Air District for the current date.
Do I have to replace my working gas furnace?
No. The rule applies to new furnaces sold and installed after the effective date. It does not require removal of a working one.
How long does furnace installation take?
Often about a day, depending on the venting and the permit. We give you an expected schedule with the quote.
Do I need a permit?
In most cases yes. We handle it.
What size furnace do I need?
It depends on your home's heating needs, not only its square footage. We size it for your home.
How long will a new furnace last?
Often 15 to 20 years for a standard furnace, with proper sizing and yearly maintenance. See the furnace installation pricing guide.
Is a heat pump better than a furnace in San Jose?
For many homes, yes, since it also cools. It depends on your electrical panel, ducts and energy costs. We compare both with prices.
Talk to a person
Call any hour for emergency service, or reach us during business hours for a visit or a quote.