Heating & A/C Maintenance, Service and Installation, Naperville & Geneva, IL

Take advantage of our great SEASONAL SPECIALS!

SAVE $250 on A/C Install - or - SAVE $500 on A/C + Furnace COMBO when you BOOK your A/C Install for MAY 2021. (Expires May 31)

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Get $25 OFF “Early-Bird” Discount on Spring A/C Clean & Check when you BOOK by May 30. (Expires June 30)

We know that cash is tight, so Harmonic offers several finance options.

Think of it as your own HARMONIC HOME STIMULUS package.



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

New A/C Installed for as low as $45/mo

Spring A/C Installation Specials


New A/C Installation
Installed for as Low as:

Up to 1700 sqft for $46/mo
2.5 Ton A/C

Up to 2200 sqft for $50/mo
3.0 Ton A/C

Up to 2700 sqft for $60/mo
4.0 Ton A/C

Up to 3200 sqft for $67/mo
5.0 Ton A/C

While Supplies Last | Cash discounts are available

A/C & Furnace Combo
Installed for as Low as:

Up to 1700 sqft for $84/mo
2.5 Ton A/C w/ 70k btu Furnace

Up to 2200 sqft for $88/mo
3.0 Ton A/C w/ 90k btu Furnace

Up to 2700 sqft for $101/mo
4.0 Ton A/C w/ 110k btu Furnace

Up to 3200 sqft for $109/mo
5.0 Ton A/C w/ 135k btu Furnace

While Supplies Last | Cash discounts are available

Exclusive 12 Year Parts and Labor Warranty

Customize Your Comfort


Exclusive 12 Year Parts & Labor Warranty

1st Year Maintenance Free when you purchase a Furnace or A/C from Harmonic

NO-LEMON Policy to protect your equipment for the first 10 Years!

Harmonic Heating & Air Conditioning is a Proud member of the local Chamber of Commerce in Naperville, IL and Oswego, IL

Naperville HVAC Professionals



We Customize Your Comfort - Making your home Smarter, Healthier, and more Efficient.
services we offer





Our Current Specials

Install a new BASIC A/C & Furnace System COMBO

for as LOW as $84 - $109/Mo (based on home sq/ft)

Install a High-Efficient "Gold" System COMBO

for ONLY $121 - $160/Mo (based on home sq/ft)

Take $25 OFF

Any regular priced service, or product installation. (Not valid with any other offers or coupons. Limited time offer.)

Book Now!

Install a new BASIC Hot Water Heater for $1405

for LESS THAN $19/Mo

Install a new High-Efficient Hot Water Heater for $2315

for LESS THAN $31/Mo

Install a TANKLESS Hot Water Heater Starting at $3615

LESS THAN $48/Mo (for 1.5 bath home)

Book Now!

SAVE MORE when you're a "Rock*Star"

Join the Rock*Star Plan!


Schedule a FREE Home Comfort Assessment





Thanks for your Love "Friends". You've helped Harmonic win an award.

Harmonic Heating & Air Conditioning are proud winner of the People Love Us On Yelp Award!


We take great pride in serving our friends and family in the Aurora, Oswego, Naperville and surrounding areas. We believe that we install the best furnace and air conditioning equipment available, and provide the greatest value to our customers.



Aprilaire air quality systems



Our team is on time or early - Guaranteed

THE "AT YOUR DOOR" GUARANTEE

Don’t Waste Your Day Waiting For A Four Hour “Window”. Schedule Your Guaranteed Appointment Online.

If We Aren’t On Time Or Early, We’ll Give You A $25 Amazon Gift Card.

One Of The Little Things That Make A BIG Difference At Harmonic Heating & Air Conditioning.

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Flat Rate Pricing Guarantee

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Get Your Free Estimate Today

Get Started

Harmonic Heating & Air Conditioningstarstarstarstarstar4.9 / 5

233 Total Reviews /files//harmonic-logo-footer.png630-999-9008$10S187 Schoger Dr Suite #54, Naperville IL




Financing with SERVICE FINANCE Company is Available

Click the buttons below to apply for financing.

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WHAT YOU CAN EXPECT

  • We listen when you call and make an appointment.
  • We arrive on time.
  • We provide up front pricing so that you are never surprised.
  • We carry out all transactions with honesty and integrity.
  • We guarantee all our work and stand behind all warranties.
  • We happily address any needs you have to make your home or business comfortable.

We are now a certified Armstrong Air Comfort Team

Harmonic Heating & Air Conditioningstarstarstarstarstar4.9 / 5

233 Total Reviews /files//harmonic-logo-footer.png630-999-9008$10S187 Schoger Dr Suite #54, Naperville IL



Harmonic provides expert heating, a/c and air quality system services in Aurora, Naperville, Montgomery, Oswego, Wheaton & More!