Girl sitting on the couch with a warm drink.

Ballard Natural Gas is the leading HVAC company in Seattle, WA, for your furnace service needs. We service and repair all makes and models. If you need furnace service, we are the company to call. Our skilled technicians are qualified to solve just about any repair or installation that you throw at us.

Furnace Repair

Don’t get left in the cold! Is your furnace acting up, blowing cold air, or making too much noise? Our experienced team of professionals is here to keep your home warm and cozy. We repair all makes and models, and we will never try to sell you a service that you don’t need. Our technicians are honest and hard working, and we’re always transparent and fair about the work we do.

Furnace Replacement

Sometimes a repair is not sufficient to fix your furnace. Sometimes a new furnace is the most cost-effective and energy-efficient way to go. We will always be honest with you about a possible furnace replacement. We value our time and your money––we don’t want to perform repairs or service on an appliance that is in need of replacement.

If you do need a furnace replacement, we know how overwhelming it can be. Here are some of the frequently asked questions about furnaces that we get from some of our Seattle, WA residents:

What Are The Different Types Of Furnaces?

Single Stage: A single-stage furnace has only one stage of operation. It can either be turned on or turned off.

Two Stage: A two-stage furnace has two settings––full and half speed. This is a more efficient way to heat and provides for better comfort, because it can move the air at a slower pace.

Variable Stage or Modulating: A variable-stage or modulating furnace modulates the speed and heat output based on the temperature outside and the desired comfort level. This furnace only works as much as you need it, making this type the most energy-efficient type of furnace.

What Is AFUE?

AFUE, or Annualized Fuel Utilization Efficiency, is a measure of furnace-heating efficiency. The higher the AFUE, the more efficient the furnace.

How Much Money Can a New Furnace Save You?

Our AFUE energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's AFUE value and compare it to a newer, more efficient system. You can even customize it to better match your home's system for a more accurate calculation.

AFUE Energy Savings Calculator

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Customize to Your Home

Adjust these settings for a more accurate calculation:




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** Data from U.S. Energy Information Administration
*** Data from 2002 EPA study

** Data for Canadian cities from nrcan.gc.ca
*** Data from weatherdatadepot.com

What Size Furnace Do I Need?

We can calculate the correct size furnace for your home. The number of BTUs, or British Thermal Units, needed to heat your home is dependent on a number of variables. Contrary to what you might think, a bigger furnace may not necessarily mean more heating power for your home. Call us at Ballard Natural Gas, and we can set up an appointment to calculate the furnace size you might need.

Need Furnace Service?

Contact the experts at Ballard Natural Gas.

Call us at 206-784-8101!

Gas Furnace Maintenance in Seattle, WA 98199

“Justin was so professional, answered our questions, did a great servicing job. He has always provided great service” – David C.

Gas Furnace Maintenance in Ballard, WA 98107

“Justine was professional and polite. Did maintenance on our gas furnace and three splits. Thank you.”

– MaryAnne M.

Gas Furnace Maintenance in Seattle, WA 98102

“Justin did the maintenance on my furnace and AC. He did everything quickly, answered all my questions, and was courteous and professional the whole time. Great experience.”

– Nemanja M.

Gas Furnace Maintenance in Capitol Hill, WA 98102

“Justin was here today and did an awesome job of tuning up my gas furnace and 2 gas fireplaces!”

– Catherine S.

Gas Furnace Maintenance in Seattle, WA 98119

“We are big fans of Justin our furnace technician with Ballard Natural Gas. He comes every year to do maintenance on our basement furnace and wall furnace. He is knowledgeable, easy to work with, thoughtful, and genuinely nice. We highly recommend Justin and Ballard Natural Gas.”

– kr s.

Gas Furnace Repair in Seattle, WA 98105

“Prompt, on-time service with exception value. Technician was able to correct the problem quickly and didn’t mind me looking on as he explained the problem and how to correct it. Beyond satisfied!”

– Lorie W.

Gas Furnace Maintenance in Seattle, WA 98115

“Our service professional, Justin, is always friendly and efficient. He always lets us know exactly what he has done, and let us know what he suggests for keeping our furnace in good working condition.”

– Steve M.

Gas Furnace Installation in Seattle, WA 98199

“Alex arrived on time ready to go. Despite numerous challenges he stayed until we had a new operating furnace (12 hours) as promised. Perfectly timed to be ready for the coldest morning of the Fall.”


Gas Furnace Maintenance in Seattle, WA 98117

“Regarding annual maintenance for St. Paul’s United Church of Christ. Wilson was extremely thorough and very professional. I would highly recommend Ballard Natural Gas Service!”

– Johnny s.

Gas Furnace Repair in Ballard, WA 98115

“Justin was very helpful and informative. He quickly got my furnace running and provided advice on how to improve my system long term.”

– Callum C.

Ballard Natural Gas proudly provides HVAC service to Seattle, Shoreline, Edmonds, and the surrounding communities. Visit our service area page for more coverage details, call us at 206-784-8101, or request service online today.