Furnace Installation
Furnace Installation in Sacramento
A furnace installation is only as good as the work that goes into it before the equipment ever gets set. Whether you’re installing a system for the first time or handling a furnace replacement, Clarke & Rush has installed heating systems across the Sacramento area since 1963, and our licensed technicians handle every stage of the job – sizing, ductwork, permitting, and testing – to manufacturer specifications and California code.
How We Size Your Furnace
Furnace sizing starts with a room-by-room load calculation based on your home’s square footage, insulation levels, window efficiency, ceiling height, and layout, not a guess based on the size of any equipment already in the home. An oversized furnace short cycles, wearing out components faster and creating uneven temperatures, while an undersized one runs constantly and still struggles to keep up on cold mornings. Getting the load calculation right is what determines whether the rest of the installation performs the way it’s supposed to.
Equipment Options
Heating Output Staging
A furnace’s heating output can be single-stage, two-stage, or modulating, and this is a separate spec from the blower motor. Single-stage furnaces fire at full capacity every time they turn on, straightforward and reliable, with more noticeable temperature swings between cycles. Two-stage furnaces run at a lower firing rate most of the time and ramp to full output only in colder conditions, improving comfort and reducing wear. Modulating furnaces adjust heating output in small increments rather than switching between fixed stages.
Blower Motor Type
Blower motor type is independent of heating stage. A variable-speed blower adjusts airflow continuously rather than running at one or two fixed speeds, which improves temperature consistency and reduces noise, regardless of whether the furnace’s heating output itself is single-stage, two-stage, or modulating. Many higher-efficiency furnaces pair a two-stage or modulating gas valve with a variable-speed blower, but the two specs aren’t interchangeable.
As a Carrier Factory Authorized Dealer and American Standard Platinum Dealer, as well as a certified dealer for other brands, we install across these categories. Carrier’s Comfort Series furnaces are single-stage, the Performance Series offers two-stage and variable-speed blower options, and Infinity Series furnaces include two-stage and variable-speed as standard. We’ll go over which tier fits your home and budget during your estimate.
AFUE and Efficiency Ratings
AFUE, or Annual Fuel Utilization Efficiency, measures how much of the fuel a furnace burns actually becomes usable heat. Standard-efficiency furnaces run around 80% AFUE, high-efficiency units fall between 90 and 95%, and premium units reach 96% or higher. Higher AFUE means less fuel wasted, though it also typically means a higher equipment cost, which is part of what we walk through when comparing options.
Packaged Systems
A packaged system houses the compressor, coils, blower, and heating source together in a single outdoor cabinet, rather than splitting them between an indoor furnace or air handler and an outdoor condenser. It sits on a rooftop or a concrete pad, with ductwork running from that one unit into the home. Packaged systems come up most often when there’s no attic, basement, or closet space for an indoor unit, or when a home’s layout makes a rooftop or pad installation simpler than running refrigerant lines to a split system.
We install packaged systems from both Carrier and American Standard, including gas/electric packaged units that combine a gas furnace and electric air conditioning in one cabinet, straight packaged air conditioners, and packaged heat pumps. We’ll walk you through whether a packaged system or a traditional split system fits your home better during your estimate.
Ductwork Sizing and Sealing
Gas Line, Venting, and Combustion Safety
As part of startup and commissioning, our technicians verify applicable gas pressure, venting, and combustion-safety requirements before putting a gas furnace into service. Venting is sized and routed according to the furnace’s category and manufacturer specifications, since improper venting is a carbon monoxide risk, not just an efficiency issue.
Our Furnace Installation Process
1. In-Home Evaluation and Load Calculation
We assess square footage, insulation, existing ductwork, airflow, and comfort concerns, then calculate the heating load for your specific home.
2. Equipment and Duct Sizing
We match the furnace to the calculated load and size or evaluate the ductwork needed to move that system’s airflow.
3. Permitting
We pull the required mechanical permit through the appropriate local building department before installation begins.
4. Installation
Our technicians install the furnace, gas line or electrical connections, and any ductwork work according to manufacturer specifications and California building code.
5. Testing and Commissioning
As part of startup and commissioning, we verify applicable gas pressure, airflow, temperature rise, and venting against manufacturer specifications.
6. Inspection and Walkthrough
We schedule the required inspection, then walk you through system operation, filter replacement schedules, and your warranty coverage.
Permits and Inspections
Permit and inspection requirements vary by jurisdiction across the Sacramento area, including Sacramento, Placer, and Yolo counties, but new furnace installations generally require a mechanical permit and inspection, along with compliance with California’s Title 24 energy code for HVAC systems. We handle required permitting through the appropriate local building department and coordinate the necessary inspection as part of the installation.
Financing for Furnace Installation
Through Synchrony, our Install Financing plan offers no interest if paid in full within 12 months, though deferred interest applies at 26.99% APR if the balance isn’t paid off in that window, along with low fixed payment options at a 27-month or 5-year term at 5.99% APR.* This is in addition to our standard Services financing (0% interest for 6 months on purchases of $1,000 or more, plus 5-year and 11-year fixed terms), so a furnace installation qualifies for the stronger install-specific terms.
For larger projects, GoGreen Financing offers terms from 12 to 180 months with 100% financing available, including installation costs, and reduced or no payments for the first six months for qualified customers. We also work with Renew Financial’s PACE financing program, which finances the project with no upfront cost and repays through your property tax bill instead of a monthly loan payment, with terms up to 30 years depending on the improvement.*
Your Clarke & Rush representative will review which of these options you qualify for at the time of your estimate, since eligibility depends on credit approval and project type.
Considering a Heat Pump Instead? Current Sacramento Rebates
Utility rebates in the Sacramento area are currently structured around electric heat pump systems rather than traditional gas furnaces. If you’re weighing a heat pump installation against a gas furnace for your new system, SMUD offers rebates up to $3,000 for a qualifying high-efficiency heat pump, and Roseville Electric Utility customers may qualify for up to $2,500 specifically for variable-speed heat pump systems.* These incentives can shift the overall project economics enough to be worth factoring in even if you’re leaning toward gas. Utility incentive programs change and are updated periodically, so we’ll confirm current rebate amounts and eligibility with you directly.
*As of 2026. Check our financing page for current rates and offers.
Protect Your New Furnace With the Energy Saving Plan
Our Energy Saving Plan (ESP) membership helps protect your new system after installation, with a comprehensive AC and heating tune-up twice a year, 10% off future repairs, priority scheduling ahead of non-member appointments, and a one-year extended warranty on specific repairs with no diagnostic fee. Membership is $199 a year for one system, $289 for two, and $379 for three, with additional units at $90 each.
Why Sacramento Homeowners Choose Clarke & Rush for Furnace Installation
We’re a Carrier Factory Authorized Dealer and an American Standard Platinum Dealer, as well as a certified dealer for other brands. Every installation is permitted and inspected to California building code, and backed by both the manufacturer’s equipment warranty and our own workmanship coverage. We’ve been installing furnaces in the Sacramento area since 1963, long enough to have worked through just about every ductwork configuration and housing type this region has.
Furnace Installation Service Areas
Clarke & Rush provides furnace installation throughout Sacramento and the surrounding region, including:
No matter where you are in these areas, our certified HVAC experts are just a call away.
What Our Customers Say
“Installation of our new furnace and AC unit went smoothly. Technicians were friendly, knowledgeable, and kept the work areas clean throughout the process. I definitely recommend Clarke and Rush.”
— Tyler B.
“Clarke & Rush completely replaced my gas furnace and AC with a Mitsubishi heat pump. Installation was totally professional and passed inspection on the first inspector visit. The result was a whisper quiet fan and reduced energy cost. Backup staff work was excellent, and they prepared all the complex paperwork necessary for the SMUD rebates.”
— Charles W.
Frequently Asked Questions About Furnace Installation in Sacramento
How long does furnace installation take?
Most residential furnace installations are completed in one day. Projects involving new or modified ductwork typically take longer.
What size furnace do I need for my Sacramento home?
The correct size depends on square footage, insulation, window efficiency, ceiling height, and home layout. A load calculation based on these factors, not a guess based on the old unit, is the reliable way to size a system.
What permits are required for furnace installation?
Requirements vary by city and county, but most jurisdictions across the Sacramento area, including Sacramento, Placer, and Yolo counties, require a mechanical permit and inspection along with compliance with California’s Title 24 energy code. We handle the permitting through the appropriate local building department.
What’s a good AFUE rating for a new furnace?
New furnaces generally range from about 80% AFUE on standard-efficiency models up to 96% or higher on premium units. Where you land in that range depends on your upfront budget, how many more years you plan to stay in the home, and how much weight you’re putting on long-term energy savings versus initial cost.
Can my existing ductwork be reused with a new furnace?
Sometimes. It depends on whether the existing ducts are sized correctly for the new system’s airflow and are free of significant leakage. We evaluate this as part of the installation rather than assuming it can be reused.
Do you install packaged units?
Yes. We install packaged systems from Carrier and American Standard, including gas/electric packaged units, packaged air conditioners, and packaged heat pumps, for homes where a rooftop or pad-mounted single-cabinet system makes more sense than a traditional split system.
Do you offer financing for furnace installation?
Yes. Through Synchrony, we offer no interest if paid in full within 12 months on install financing, along with fixed payment plans, and we also work with GoGreen Financing and Renew Financial’s PACE program for larger projects.*
*As of 2026. Check our financing page for current rates and offers.
Are there rebates available if I’m considering a heat pump instead of a gas furnace?
Current utility rebates in Sacramento apply to electric heat pump systems rather than gas furnaces. SMUD offers up to $3,000 for a qualifying heat pump, and Roseville Electric Utility offers up to $2,500 specifically for variable-speed heat pump systems. If you’re weighing a heat pump against a gas furnace, these are worth factoring into the comparison. Rebate programs and amounts change, so we’ll confirm current availability directly.
Furnace Installation & Replacement in Sacramento, CA
Professional furnace installation services in Sacramento, CA. Clarke & Rush provides expert furnace replacement and new furnace installation, helping homeowners improve comfort, energy efficiency, and heating performance with professionally installed systems. Serving Sacramento and surrounding communities since 1963.
Service Type: Furnace Installation
How long does furnace installation take?
Most residential furnace installations can be completed in one day. More complex projects involving ductwork modifications or system upgrades may require additional time.
What size furnace do I need for my Sacramento home?
The correct furnace size depends on factors including square footage, insulation, window efficiency, ceiling height, and home layout. A professional load calculation is the best way to determine proper sizing.
Should I replace my furnace before it fails?
In many cases, yes. Replacing an aging furnace before a breakdown can help avoid emergency replacement costs, improve efficiency, and provide more equipment options.
What is a good AFUE rating for a new furnace?
Most homeowners today choose systems with AFUE ratings between 90% and 96%, which provide significant efficiency improvements compared to older units.
Will a new furnace lower my energy bills?
A properly sized, high-efficiency furnace can often reduce heating costs, especially when replacing a system that is 15 years old or older.
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