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Furnace Installation in Greater Sacramento

We install new and replacement gas furnaces, alone or together with an air conditioner or heat pump. The in-home installation estimate is free and comes with options. Repair visits have a service charge.

When a new furnace makes sense

A major part, such as the heat exchanger, has failed, and the repair would cost close to a new furnace.
The furnace keeps needing repairs.
You are replacing the air conditioner, and the furnace is near the end of its life too.

We price repair and replacement side by side, and we recommend the repair whenever it is the better choice for you. Not heating right now? Start with a repair visit.

Your options

Gas furnace only. Your current air conditioner stays (when it is in good shape).
Furnace and air conditioner. Replaced together and chosen to work as one system.
Furnace and heat pump. The heat pump heats most of the year, and the gas furnace takes over in the coldest weather (often called dual fuel).
Heat pump instead of a furnace. One system heats and cools with electricity. Some utilities pay a rebate when a heat pump replaces a gas furnace (see rebates in our area).

We can price 80% AFUE gas furnaces and high-efficiency condensing gas furnaces (92% to 98% AFUE, depending on the model). A condensing furnace vents through plastic pipe and needs a drain, so where your furnace sits matters. We install Goodman and Daikin systems.

The free in-home estimate

We look at the furnace, venting, gas line, ducts and electrical, and take the measurements for a heat-load calculation. You get a written installation quote with options, at no charge and with no obligation. Repair visits have a service charge.

We size the new furnace with that calculation, not by the old one’s size, because insulation, new windows or an addition change what a house needs. The California Energy Commission says new HVAC systems require load calculations.

What the installation includes

Removing and hauling away the old furnace (and the old air conditioner or heat pump, if we replace it) and disposing of it as required. Refrigerant in old cooling equipment is recovered first by an EPA 608 certified technician.
Connecting the new furnace to the gas line, venting, ducts, drain and wiring, and testing the gas connections for leaks.
Starting the furnace and checking it against the manufacturer’s instructions, including a carbon monoxide check.
Registering the new system with the manufacturer within 60 days and sending you the confirmation.

Permit, duct test and final inspection

In California a permit is required when an HVAC unit is replaced. We get the permit for you and schedule the inspections. Under the 2025 California Energy Code:

Duct test. A gas furnace is the air handler of a ducted system, so replacing it triggers duct sealing and a leakage test checked by an independent ECC-Rater (formerly called a HERS Rater). The exceptions are ducts already tested and certified by an ECC-Rater, duct systems shorter than 40 feet and ducts that contain asbestos.
New air conditioner or heat pump. In our area the ECC-Rater also verifies the refrigerant charge and airflow, and the thermostat has to be a digital setback type.
Smoke and carbon monoxide alarms. When a permit covers more than $1,000 of work on a home, California requires these alarms where the code calls for them, if the home doesn’t have them yet.
Final inspection. Your city or county inspector checks the finished work and closes the permit.

Warranty

New residential installations come with our 2-Year Limited Installation Workmanship Warranty (5 years with documented annual maintenance by any California-licensed HVAC contractor, see furnace tune-up). Equipment parts are covered separately by the manufacturer’s limited parts warranty, which comes from the manufacturer, not from us. Ask us for a copy of the complete written warranty terms before you buy.

When we work

We are open 7 days a week, 7am–8pm, with emergency calls until midnight, in Fair Oaks, Carmichael, Folsom, Roseville, Sacramento and the other communities on our service areas page. Request an estimate online, or call or text (916) 605-9767.

Furnace installation questions

Yes. In California a permit is required when an HVAC unit is replaced. We get the permit for you, and your city or county closes it after the final inspection.

Usually, yes. Replacing a gas furnace counts as replacing the air handler, which triggers duct sealing and a leakage test checked by an ECC-Rater. Ducts already certified by an ECC-Rater, duct systems shorter than 40 feet and ducts that contain asbestos are exempt.

Yes. We come to your home, look over your system and give you a written installation quote with options, at no charge and with no obligation. Repair visits have a service charge.

Not always. If your AC is newer and working well, a furnace alone can make sense. If it is old or uses R-22 (not produced or imported in the U.S. since 2020), replacing both lets the new equipment be chosen to work as one system. We price it both ways.

Yes. A heat pump heats and cools, and it can replace the furnace or work alongside it. Rebates depend on who supplies your electricity (see our rebates page).

GRS Service HVAC Inc. · CSLB C-20 #1154007. Sources: California Energy Commission, guidance for homeowners (permits), HVAC FAQ (load calculations, refrigerant recovery and charge) and 2025 Single-Family Compliance Manual, Chapter 9 (duct sealing and testing, thermostats); City of Sacramento, smoke and carbon monoxide alarm requirements; U.S. EPA, HCFC phaseout (R-22). Checked October 2026.