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How the process of installing
your new furnace works:

  • Our team members are all qualified and want to ensure that you get exactly the solution right for your home; they can explain any advantages or drawbacks from the available options and guide you on the right new heater.
  • Our St. George heating and air conditioning services professional can inspect your home and existing furnace to gather spatial information as well as the functional needs of your home for optimal heating.
  • From start to finish, we will take care of the installation to avoid any issues with your new heating solution.


There are so many available brands and advertisements out there, and it can be confusing for the everyday homeowner. With such an important investment for your home, our St. George HVAC technicians want to help you avoid any wasted effort or resources in the selection process. While we work through selecting your new furnace with you, we advise you on all applicable costs based on the unit selected. There are numerous upsides and downsides to whether you select electric, oil, or gas heating for your home and we will help you make the most educated choice.

Contact Us For a FREE
Furnace Installation Estimate

Our helpful and friendly team are waiting for your call. Once you contact us about needed repairs, our technicians will arrive in easily identifiable, marked vans to provide the professional service you require. Also, ask about Gold Comfort Club membership. With that, you pay no after hour rates!

New Furnace Replacement Cost

The national average cost of a standard efficiency natural gas furnace ranges from $2,150 to $7,900 with an average around $3,500. The price may vary based on brand, complexity of install, and the efficiency of the new unit.  In home consultation are free of charge.

Cost of a New Furnace

Furnace Type Average Costs Cost per 100,000 BTU
Gas Furnace $800 – $2,400 $1.10
Electric Furnace $700 – $2,000 $2.93

When deciding on which type of furnace to buy, it makes the most sense to go with the same fuel system as the old one because you already have an existing structure in place to support it. Most US homes have a gas furnace, while some of the more northern states use oil, and many rural areas have wood-burning furnaces. However, there could be reasons to change based on your house size, location, and energy bills.

Furnace Installation Cost

A new furnace costs between $750 and $1,600 for professional installation. It should be done in one day and is usually carried out by two technicians. It will cost more if you have additional work to do to get it up and running.

Craftsman’s 2018 guide says US average installation prices are as follows for a gas-fired forced air furnace:

Furnace BTUs Furnace Cost Labor Cost Total Cost
80,000 BTU $1,850 $1,528 $3,378
100,000 BTU $2,160 $1,583 $3,743


Natural Gas furnaces are the most popular and commonly used furnace, especially in areas with harsh winters. On average, gas furnaces cost is more cost effective to operate than electric and or heat pump heating systems.

Most natural gas system can be converted to propane.  A gas furnaces can typically be converted to propane at the cost of $75-$100. This propane conversion kit includes replacing the gas valve, jets, and burners depending on the furnace.

All gas furnace installation should include deration of gas valve based on altitude.  Green sticker certification for the state of Utah and a combustion test to verify proper burn of natural gas or propane fuel.

Contact Us For a FREE
Furnace Installation Estimate

Our helpful and friendly team are waiting for your call. Once you contact us about needed repairs, our technicians will arrive in easily identifiable, marked vans to provide the professional service you require. Also, ask about Gold Comfort Club membership. With that, you pay no after hour rates!


High-efficiency furnaces are getting a lot of attention from consumers and from the energy companies. Many power companies provide rebates for installing energy-efficient systems and almost all of our appliances have an Energy Star rating so that we can evaluate the equipment’s usage. But what is really the difference between a few percentages of efficiency for furnaces? Here are some information that may help you make your decision.

Are you considering replacing your standard efficiency furnace? The idea of installing a high-efficiency new furnace might be on your mind. In some cases, opting for a high-efficiency furnace is a great idea. But is it the best choice, even if your HVAC guy says you’ll make up the difference in cost?

gas efficiency graph

Differences between 80% and 95% furnaces

A standard efficiency furnace provides 80% annual fuel utilization efficiency (AFUE). In this type of furnace, 20% of the energy produced by natural gas is expelled as exhaust. High-efficiency furnaces offer 90% or more AFUE. These days, 95% AFUE is a common rating among new gas-powered furnaces.  You may have questioned what all the steam coming out the pipes on people’s roofs is on a cold winter morning?  It the 20% of gas that is expelled to the exterior or the 10% on a high-efficiency furnace.  The largest difference between the two furnaces aside from efficiency the air the furnace burns to make heat.  The 80% furnace burns the air from inside your home and the 90% furnace brings in its own air from outside.

Does efficiency and safety matter to you?  Here are some of the impacts of upgrading.

  • Cost: The upgrade cost from 80% to 90% is much more than staying with your traditional furnace. However, there is long-term cost savings and local rebates to help soften the cost. See local St. George, UT area rebates here.
  • Safety: 90% furnaces combust gas into heat more efficiently, this combustion efficiency happens when the 90% furnace brings in its own outside air for combustion purposes. This process is much different than the 80% burning air from inside your home. The 90% furnace is safer for your family during the winter months.

80% VS. 90% Efficiency Debate


There are many considerations when contemplating the purchase of a new furnace system. Let one of our professionals consult with you about your options, installation needs and what fits your family best.

See what other about their experiences BBB.

See What Your Neighbors Think Of Us

Much faster than I hoped for

Much faster than I hoped for. Service to my furnace was done efficiently and politely. The tech, Michael, was friendly. The price was better than I expected. I will use S & S again.

James Petersen

We will definitely use S&S again in the future

We will definitely use S&S again in the future. We love our new equipment and had the best service compared to other companies we’ve used. Shane was so friendly and helpful. Thank you all!

Melinda Murphy

S & S is an amazing service provider

S & S is an amazing service provider. Thanks to them my furnace has been better than ever.

Shelly Berge

Contact us at (435) 628-4334 any time for the professional care
you deserve from S&S Mechanical Contractors.

Trust Certification guarantees excellent service training
and high standards of customer service.

S&S Mechanical Contractors BBB Business Review

The Trust Certified Guarantee means your technician:

  • Passed background check covering the past seven years
  • Passed drug testing
  • Passed the Trust Certified Technician Exam
  • Received Carrier Authorized Dealer Certification