Gas Furnaces

Furnace service.

Interstate Heating Co. is the leading HVAC company in Sussex, WI, 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.

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

{{ afueOld }}% vs {{ afueNew }}%


{{ annualNaturalGasSavingsPercent() }}%
Savings

OLD
{{ afueOld }}%
AFUE
${{ afueAnnualOperatingCostOldUnit() }}
Annual Cost
NEW
{{ afueNew }}%
AFUE
${{ afueAnnualOperatingCostNewUnit() }}
Annual Cost

Estimated 15-Year Savings:*
${{ projectedNaturalGasSavings }}


{{ year }} {{ state }} average residential natural gas retail price of ${{ rateResidentialNaturalGas }}/Mcf**.
*Based on an average annual rate increase of {{ avgUtilityIncrease }}%.

This calculator does not guarantee actual costs or savings and is only to be used for educational purposes.

Customize to Your Home

Adjust these settings for a more accurate calculation:

State

Province

Region

Rate ($/Mcf)

BTUs

Average Annual Heating Hours***


Historical Comparison

{{ state }}'s natural gas prices compared to {{ yearFifteenYearsAgo }}.

{{ yearFifteenYearsAgo }}

--

${{ priceFifteenYearsAgo }}/Mcf

{{ yearTenYearsAgo }}

{{ differenceTenYears }}

${{ priceTenYearsAgo }}/Mcf

{{ yearFiveYearsAgo }}

{{ differenceFiveYears }}

${{ priceFiveYearsAgo }}/Mcf

{{ year }}

{{ differenceCurrentYear }}

${{ rateResidentialNaturalGas }}/Mcf


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

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

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 Sussex, WI 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.

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 Interstate Heating Co., and we can set up an appointment to calculate the furnace size you might need.

“Had a gas smell issue and the repairman responded right away even though it was after hours. Very knowledgeable and friendly; easy to work with and answered all my questions. Very happy with his services.”
- Marty T.
“The installers were great. They answered all my questions and set up the zone control exactly the way I wanted. The new furnace is quiet, efficient and the house is cozy. They even took the time to fix a whistling damper that was installed by a different company. Very pleased. I highly recommend Interstate to anyone who needs HVAC service. Good guys.”
- Steve S.
“Jack was very courteous and asked if I had any questions regarding what he was doing. I didn’t appreciate the amount I was billed $155 when I was told when I made the appointment that it would be $99. Office person I made appointment with knew it was maintenance call . It was made maybe 3-4 weeks prior- if service call I would have wanted it as soon as possible.”
- Sue O.
“Josh arrived on time and went right to work. He was able to diagnose the issue with my furnace and repair it quickly. He was personable and professional, and answered all of my questions. I was so thankful that it was a fairly easy fix, especially during this frigid weather. I would recommend Interstate Heating for any repair!”
- Dayna S.
“Our service technician, Jack, was prompt and arrived in a neat appearing uniform. He greeted us with a smile and handshake and chatted with us for a few moments about our furnace, and what service he was about to perform. He was police, quiet and diligent, and offered a full explanation of what service he performed. Jack was easy to understand and enjoyable to speak with. He is an excellent ambassador for his profession as well as for the company. We will definitely use Interstate Heating again and ask for Jack to be our service technician. Well done, Jack!”
- Doug L.

Need Furnace Service?

Contact the experts at Interstate Heating Co.

Call us at 262-246-4772!