Furnace Installation

Reliable Local Furnace Installers When You Need It Most

Mainstream has installed furnaces in Spokane and Northern Idaho homes since 2000. From gas systems to garage setups, we make it easy to get the heat you need.

A Mainstream HVAC technician installing a new furnace

Furnace Installation Services

Spokane Homeowners Trust Our Furnace Installers

Choosing the right team to install your furnace isn’t just about heat—it’s about making sure your home runs safely and efficiently all season long. At Mainstream, we’ve installed thousands of furnaces across Eastern Washington and Northern Idaho, and we bring that experience to every job. Whether you need a gas furnace installation, a high-efficiency upgrade, or a new furnace installed in your garage, our licensed installers handle everything from removal to testing, with upfront pricing and fast scheduling in Spokane, Spokane Valley, and beyond.

The Mainstream Difference

Why Spokane Homeowners Choose Mainstream

Welcome to Mainstream Home Services  – your one-stop solution for all your electrical, heating, cooling, and plumbing needs. Here’s why you should trust us with your home services:

Flexible Scheduling

We respect your time and prioritize efficient communication. We ensure minimal wait times for our technicians, allowing you to spend more time enjoying your home. Expect a call before our technician arrives, giving you the flexibility to plan your day accordingly.

Transparent Pricing

No surprises, no hidden costs. Our upfront pricing provides competitive quotes tailored to your specific service requirements. You'll receive a detailed breakdown of the work involved, ensuring transparency and total peace of mind.

Expert Technicians

Our friendly, skilled technicians are experts in electrical, heating, cooling, and plumbing services. With state-of-the-art tools and expertise, we guarantee precise, code-compliant work. Your home will be left spotless, reflecting our commitment to cleanliness and professionalism.

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2 Mainstream Technicians Sitting in Truck

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Your Home Air Experts

Ready to elevate your home’s comfort? Discover a variety of services beyond heating repairs that cater to your every need. Explore the full range by clicking the links below:

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Furnaces

Frequently Asked Questions

The 3 main types of new furnace installations available are:

Gas Furnaces

Gas furnaces are the most commonly installed furnaces in Spokane homes.

More efficient than installed oil furnaces, but less than electric, gas furnaces are typically the cheapest to run, as they use natural gas as an energy source. With this, your home runs the risk of creating a buildup of carbon monoxide, and your furnace will require on-going maintenance throughout its life.

Gas furnaces are, however, the least expensive model to run using natural gas, making them a favorable choice for furnace replacement.

Electric Furnaces

The electric furnace is another popular choice for homeowners. Electric furnace installations are less expensive, as they require only electricity and not natural gas line piping installation or oil storage tanks.

On the flip-side, electrical furnaces are the most expensive to run due to their high usage of electricity. Electric furnaces still remain a common furnace replacement option with their comparatively lower purchase costs & minimal lifespan maintenance.

Oil Furnaces

Oil furnaces are not what they once were in Spokane, but they still offer some attractive benefits. Oil furnaces are able to heat large spaces evenly & have less emissions than gas furnaces, with no risk of carbon monoxide leakage in your home.

However, oil furnaces do require an on-site oil storage tank for fuel & an oil delivery service. Oil is typically more expensive than natural gas and has the lowest efficiency rating for heating per its energy source.

No matter the problem, our furnace installation technicians will determine your heating & furnace needs and finances before any work is done, so you will know what solution is best & most affordable for your new furnace system.

When you make a big, long-lasting purchase like a furnace for your home, you want to be informed. The different types of furnaces are suited to different homes, climates, and lifestyles. Mainstream will help you decide between electric, gas, and oil, what size of furnace you need, and what brand is best.

When considering furnace installation or replacement costs, it’s essential to understand the various factors that can influence the final price. Here’s a breakdown of typical costs and the factors that affect them:

Average Installation Cost: The average for a full furnace installation ranges from $4,820 to $9,350. This includes the cost of the furnace itself, labor fees, ductwork, removal, and disposal of the old furnace, as well as other installation costs or upgrades included.

Type of Furnace: The type of furnace you choose significantly impacts the installation cost. Here’s a breakdown of average installation costs for different types of furnaces:

  • Electric Furnace: Typically ranges from $1,800 to $7,300, depending on factors such as size and efficiency. Electric furnaces are suitable for regions with mild winters and are measured in kilowatts.
  • Natural Gas Furnace: Ranges from $2,800 to $9,500 for the average installation cost. High-efficiency models may cost more initially but offer long-term savings on utility costs. Natural gas furnaces are ideal for colder climates.
  • Oil Furnace: Common in regions with harsh winters, oil furnace installation costs typically range from $4,500 to $8,000 or higher. Oil furnaces require more maintenance but can have a longer lifespan.

Size and BTU Capacity: The size of the furnace is determined by the British Thermal Units (BTUs) required to heat your home. The cost of a furnace is influenced by its BTU capacity, with larger units costing more. The BTU requirement is calculated based on the square footage of your home, typically around 40 BTUs per square foot. Additional factors such as cathedral ceilings or drafty windows may require adjustments to the BTU calculation.

Installation vs. Replacement: Whether you’re installing a new furnace or replacing an existing one also affects the overall cost. Replacing an old furnace with a new one may be more cost-effective as existing infrastructure can be utilized. However, converting from one type of furnace to another or relocating the furnace may require additional work and incur higher costs.

Additional Installation Considerations: Factors such as ductwork requirements, location changes, and any necessary upgrades or modifications to accommodate the new furnace also contribute to the overall installation cost. HVAC duct installation typically costs between $10 and $20 per linear foot.

At Mainstream, we understand the importance of providing transparent pricing and delivering exceptional value to our customers. Our experienced technicians ensure efficient and professional furnace installations tailored to your specific needs, ensuring optimal comfort and performance for your home. Contact us today to schedule a consultation and receive a personalized quote for your furnace installation or replacement. With Mainstream, expect reliable service and expert solutions for all your heating needs.

Furnace Installation Near Me

Furnace Installation in Spokane Valley That’s Done Right the First Time

When the weather turns cold in Spokane Valley, there’s no time for guessing games with your heating. Whether you’re replacing an aging system, building something new, or adding heat to a space like a garage, Mainstream Electric, Heating, Cooling & Plumbing is your go-to team for expert furnace installation. We’ve been serving homes like yours since 2000—earning trust one install at a time.

We’re not just here to hook up a new furnace and head out. We’re your full-service home team. That means licensed HVAC pros installing your system, electricians ready if wiring needs updating, and plumbers on call if anything unexpected pops up along the way. With Mainstream, you get the whole crew, not just one piece of the puzzle.

We Live Here Too—and We Know What Spokane Winters Demand

We’ve been installing furnaces across Spokane Valley and Northern Idaho for over two decades. We’ve seen what works—and what doesn’t—when temps dip into the teens and families need reliable heat fast. Our techs know how to size your system properly, install it to code, and set you up for years of dependable performance.

From ranch-style homes in Greenacres to new builds near the Spokane River, every installation gets the same care and attention to detail. We show up when we say we will, explain your options in plain English, and treat your home with respect.

Looking to replace an older system? We’ve got a full guide on furnace replacement to help you decide what’s right for your home. Not sure what’s wrong? We can inspect and repair your furnace today, and let you know if there are any lingering issues that may require a new furnace to be installed.

What to Expect When You Call Mainstream

Installing a furnace isn’t just about connecting a few parts—it’s about making sure your home is safe, efficient, and ready for winter. Here’s how we do it:

  1. Assessment – We inspect your current setup, measure your home, and discuss your heating needs.
  2. Recommendations – You’ll get honest advice on what size and type of furnace fits your space and budget.
  3. Installation – Our licensed HVAC technicians handle everything, from removing the old system to testing the new one.
  4. Follow-Up – We walk you through how to use and maintain your new furnace, and we’re always here if you have questions.

Need a Gas Furnace or a Garage Install? We’ve Got You Covered

Whether you’re switching from electric to gas, upgrading an old unit, or adding heat to your detached garage, we make it easy. Our team handles gas furnace installation with precision and care—and we’re happy to walk you through the energy savings and performance benefits that come with it.

Adding heat to a new space? We also specialize in garage furnace installation, helping homeowners stay warm while working, storing, or building in their detached spaces.

Why Mainstream is Spokane Valley’s Trusted Furnace Installer

We’re not a one-truck outfit. We’re a full-service home services company with deep roots in the community and the technical expertise to back it up. Here’s why families trust us:

  • Licensed, Local Technicians – Every tech we send to your home is licensed, trained, background-checked, and friendly.
  • One Call Handles It All – We handle HVAC, electrical, and plumbing in-house. If your panel needs an upgrade or ductwork needs adjusting, we’ve got it covered—no extra phone calls.
  • Transparent Pricing – No gimmicks. Just honest, up-front pricing before any work begins.
  • 100% Home Comfort Guarantee – If it’s not right, we make it right.

We’re also here to help long after the install. If you want to extend the life of your new furnace and avoid unexpected repairs, consider joining our Care Club. It’s our maintenance plan that includes seasonal tune-ups, priority scheduling, and savings on repairs—because staying warm shouldn’t come with surprises.

Ready to Install Your Furnace? Let’s Make It Easy

If your home is ready for a fresh start with a new furnace, Mainstream is here to help. Our team serves Spokane Valley, Liberty Lake, Post Falls, and communities across the Inland Northwest. From the first call to the final test, we’re with you every step of the way.

Schedule your furnace installation today or give us a call. And if you’re still not sure if now’s the right time, learn more about furnace maintenance to keep your current system running strong while you plan ahead.

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