Furnace Replacement & Repair

Furnace Maintenance, Repair & Installation in Naperville, IL

We make it easy for Naperville and St. Charles, IL home owners to get a new furnace in terms of affordability and maintenance. We have many discounts, specials and rebates that are offered to all of our customers. The benefits with our furnace installations are so numerous that you will be counting them for months to come.

When your new furnace arrives, our friendly technicians will install it with their skilled techniques right in your home. Surrounding areas will not be disturbed and the job site will be thoroughly cleaned afterwards. We respect your home as if it was our own and take every job very seriously.

furnace troubleshooting

Harmonic Heating & Air Conditioningstarstarstarstarstar4.9 / 5

299 Total Reviews /files//harmonic-logo-footer.png630-999-9008$10S187 Schoger Dr Suite #55, Naperville IL

Armstrong Air Pro Team - Your local furnace and air conditioner experts.

Basic | A801E CT

A801E CT Armstrong Air Furnace

Bronze | A951E

A951E Armstrong Air Furnace

Silver | A802V

A802V Armstrong Air Furnace

Gold | A962V

A962V Armstrong Air Furnace

Platinum | A97MV

A97MV Armstrong Air Furnace

How much does it cost to replace a Furnace?

The furnace price will depend on the size of your home. Furnaces will vary in size and are specific to the square footage of the space being heated. Prices also vary based on AFUE which is the efficiency rating of the unit. Furnace efficiency ranges from 80% to 97%. A lower efficiency 80% furnace is less expensive, but wastes more gas and energy, equal to about 20% of your energy cost going up the chimney. A higher efficiency 96% or 97% furnace is more expensive but more efficient, only allowing about 3-4% of your energy cost escaping. Lower efficient furnaces normally have 1-stage of gas and electric blower motor, so it's either ON or OFF. But if you upgrade to a 2-stage or Variable Speed option, your system can run at a lower RPM, saving on both GAS and ELECTRIC utility bills. High-efficient systems will also allow for utility rebates that make the upgrade easier on the check book. Financing is available as well. Ask about seasonal rebates, discounts, and same-as-cash financing.

Rock*Star Plans for Your St. Charles or Naperville, IL Home

We are now a certified Armstrong Air Pro Team Member

We are now a certified Armstrong Air Comfort Team

Financing with SERVICE FINANCE Company is Available

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Get Your Exclusive 12-Year Warranty with the installation of any full system and by joining one of our Rock*Star Maintenance plans!


We customize your comfort by making your home smarter, healthier and more efficient. Your peace of mind is as important to us as your comfort.

That's why every product us backed by warranties as robust and dependable as the products themselves.

Every piece of heating & cooling equipment is eligible for a 12-Year Parts Warranty, when you join ANY one of our 3 "Rock*Star Maintenance Programs".

All other products are eligible for the 12-Year Parts Warranty.

Ask for details, terms, and conditions. All product warranties are registered by Harmonic within 30 days of purchase.

on all equipment repairs, indoor air quality & comfort items

Including humidifiers, air filters, air cleaners, thermostats and more! 12 year parts and labor warranty requires joining ANY one of our 3 Rock*Star Maintenance Programs. Ask for details, terms, and conditions.

The "Exclusive 12-year Parts & Labor Warranty" covers parts and labor cost from the time of purchase. "Exclusive 12-year Parts & Labor Warranty" requires annual maintenance to be performed by Harmonic Heating & Air Conditioning beginning immediately from the time of purchase. Maintenance must be performed annually during the initial 12-year coverage term in order to uphold warranty status. If annual maintenance is missed or not performed by Harmonic Heating & Air Conditioning, the "Exclusive 12-year Parts & Labor Warranty" becomes void immediately. Warranty coverage defaults to a 10 year part warranty and a 2 year labor warranty from the time of purchase. Warranty is registered to the purchaser and is not transferable.


when you purchase a Furnace or Air Conditioner from Harmonic!

As one of the best companies for furnace installation in Naperville, Montgomery, Oswego, Plainfield, Sugar Grove, Batavia, and their surrounding communities, we strive for customer satisfaction. We understand manufacturer's warranties do not cover certain items like duct work repairs, labor, and other equipment costs, which is why we help by offering maintenance agreements.

Harmonic Heating & Air Conditioning is your furnace expert! We can take care of any furnace maintenance, repair or installation you need!

Furnace Inspection Checklist:

  • Check flue system for safety & carbon monoxide leaks
  • Check return & air filter
  • Lubricate motors and bearing as necessary
  • Check all parts for visible wear & tear
  • Check gas train and all electrical components / connections for safety
  • Test thermostat operation
  • Clean and check heat pump assembly if necessary
  • Check proper burner ignition and efficiency
  • Confirm complete system operation and safety

Furnace Cleaning in St. Charles, IL

Is your furnace not producing enough heat? Are your gas bills extremely high? Is your furnace failing to keep up with the harsh winters? If you answered yes then you could use a tune-up. We perform annual service that has many benefits for your furnace. Call us today for your estimate!

Why Replace Furnace the Aging Furnace in Your Naperville Home?

Once the furnace install is finished, we will help you maintain it so that it lasts as long as possible. You can trust our service professionals to keep your furnace working better and longer.

Our Furnace sales staff can design the most efficient and comfortable heating system to meet your budget, desires, and lifestyles. We take the structural requirements for your home into consideration with all of our recommendations. When choosing a new furnace, considerations should include respiratory issues and allergies. Talk to our experts about all your concerns and we will guide you through the decision making process.

Our experts will do all they can to make owning a furnace easy. Numerous affordable options will be available to you. The greatest part about our installation service is our speed and efficiency. So no matter what time you need us to work, we will ensure the job is done in the best possible manner.

Furnace Repair in St. Charles and Naperville

Before the cold winter months in Naperville, Montgomery, Oswego, Plainfield, Sugar Grove, Batavia, and their surrounding communities are upon us, it's a good time to get your furnace inspected or repaired by one of Harmonic Heating & Air Conditioning's professional repair technicians.

Harmonic Heating & Air Conditioning has established itself as the premier furnace repair specialist in Naperville, Montgomery, Oswego, Plainfield, Sugar Grove, Batavia, and their surrounding communities, and you can take advantage of our affordable furnace repair services around the clock! Here are just a few of the reasons why you should choose Harmonic Heating & Air Conditioning for your furnace repairs:

  • Family Owned HVAC Contractors
  • Fully Licensed & Insured
  • 24 Hour Service
  • We Service Your Area
  • Around the Clock Customer Service
  • Affordable Repairs
  • All Makes and Models
  • Superior Service

Armstrong Air Furnaces

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Armstrong Air Furnaces