Indoor Air Quality
From air filtration and UV lights to humidification and system zoning, we help Fishers homeowners breathe easier and stay comfortable year-round.
Family-Owned & Father-Son Operated
Harmon Heating & Cooling, LLC is a family-owned, father-son operated HVAC company built on more than 35 years of hands-on experience. Jon and Justin Harmon started the business to bring straightforward, dependable heating and cooling service to Fishers and the surrounding Central Indiana communities — backed by an Armstrong Parts & Labor Warranty on qualifying installations.
35+ Years of Experience
Family & Locally Owned
Father-Son Operated
Indoor Air Quality Experts
Armstrong Warranty
Harmon Heating & Cooling handles the full range of residential heating and cooling needs for homeowners across Fishers and the surrounding Central Indiana communities, plus rooftop unit service for light commercial properties. Whether you need a new system installed, an existing unit repaired, or routine maintenance to keep things running smoothly, our team treats every home like it's our own. Below is an overview of what we install, repair, and maintain.
From air filtration and UV lights to humidification and system zoning, we help Fishers homeowners breathe easier and stay comfortable year-round.
When your AC can't keep up with an Indiana summer, we diagnose the real problem and get your Central AC system repaired, replaced, or properly maintained for Fishers homeowners.
When a ducted heat pump starts losing efficiency in the cold months, we inspect the full system to find what's actually causing the drop in performance for Fishers homeowners.
We install and service LG mini-split systems for additions, garages, and older Fishers homes without ductwork, giving you targeted comfort room by room.
When a furnace won't fire up or starts cycling on and off, we walk through ignition, blower, and airflow to find the actual cause for Fishers homeowners.
We install and service Climate Master geothermal systems, giving Fishers homeowners a more efficient way to heat and cool long-term.
Our team handles gas piping installation and repair safely and up to code for Fishers homeowners, whether you're adding a fixture or hooking up a new furnace.
We service commercial Rooftop Units for Fishers-area businesses, applying the same hands-on approach we bring to every residential job.
We rely on our reputation in Fishers and the surrounding communities, and we let our customers speak to the work we do. Read what local homeowners have to say about their experience with Harmon Heating & Cooling.
Jeff Remley
May 2026
Thanks to Jon for his quick and thorough work diagnosing and fixing an AC issue we were having and fending off a couple more! I’m looking forward to working with your company in the future!
Andrea Laria Daniels
March 2025
We have been using Harmon Heating & Cooling for over a decade at our house, our VRBO and our company. Jon is extremely knowledgeable and is so easy to talk to when it comes to explaining what is going on. We trust that we are always getting the best service and price for everything we need. It’s not easy finding somebody that you can rely on for these many years.
Eric Rhiver
March 2025
I’ve had Harmon Heating & Cooling do my hvac work for the past 20 years and he has always been professional and competitive on all the jobs. Thank Jon for a job well done.
Beth Frye
June 2024
Very professional, nice and knowledgeable!!! I hane known Jon for a little over 30 yrs. He is extremely honest and will not sell you anything you don’t need. I highly recommend his service.
A new HVAC system is a real investment, and Harmon Heating & Cooling works with Service Finance to help make that investment manageable. Whether you're replacing an aging furnace before winter or upgrading to a more efficient central AC system, financing options are available so an unexpected repair or planned upgrade doesn't have to wait.
Our team can walk you through financing options through Service Finance at the time of your estimate, so you know what to expect before any work begins.
Contact Us to ApplyDon't wait on a failing furnace or AC — get your system installed today and spread the cost into manageable monthly payments.
Flexible terms keep payments predictable, so a new system fits your budget instead of draining your savings all at once.
Financing makes it easier to step up to a more efficient Armstrong system that lowers your energy bills month after month.
Harmon Heating & Cooling, LLC is a family-owned, locally-owned HVAC company built around a father-son partnership between Jon and Justin Harmon. Jon brings more than 35 years of hands-on HVAC experience to every job the company takes on, and that experience shapes how the team approaches diagnostics, installations, and long-term system care for homeowners throughout Fishers.
The company is run the way a lot of homeowners wish more contractors were run — by people who live in the same community they serve and who answer for the work they do. Being father-son operated means there's no layer of corporate management between you and the people making decisions about your home's comfort system.
Based right here in Fishers, we're minutes away from Westfield, Noblesville, Carmel, and the surrounding communities whenever you need us.
We go beyond heating and cooling with air filtration, UV purification, and humidity control that make your home's air genuinely cleaner.
As a family-run business rooted in the community we serve, we treat every home like it's our neighbor's — because it usually is.
Two generations work side by side on the business their family built, so you're always dealing directly with the people who stand behind the work.
With more than three decades in the field, Jon has seen and solved just about every heating and cooling problem a home can throw at him.
Qualifying Armstrong installations come backed by a parts-and-labor warranty, so your investment is protected long after the job is done.
Upgrading to a more efficient heating or cooling system can come with rebate opportunities, and Harmon Heating & Cooling helps Fishers homeowners understand what may be available to them through local utility providers and equipment manufacturers.
Duke Energy offers incentives on qualifying high-efficiency HVAC upgrades. We'll help you find out what your new system may qualify for.
AES Indiana provides rebates on eligible energy-efficient equipment. We'll point you toward the programs that fit your installation.
CenterPoint Energy rebates can lower the cost of qualifying gas heating upgrades. We'll help you understand what's available in your area.
As an Armstrong dealer, we can flag manufacturer rebates on select systems. Ask us about current offers when you get your estimate.
Ask our team about current rebate opportunities when you schedule your installation or service appointment — we'll help you understand what applies to your project.
Regular maintenance is the single biggest factor in whether an HVAC system lasts as long as it should, and Harmon Heating & Cooling offers maintenance plan coverage for both residential and commercial properties in Fishers and the surrounding area.
Harmon Heating & Cooling is based in Fishers and provides heating, cooling, and indoor air quality service throughout the surrounding Central Indiana communities.
Don't see your city listed? Harmon Heating & Cooling serves additional communities throughout Central Indiana beyond our primary service area — reach out and we'll let you know if we cover your address.
Choosing an HVAC company comes down to trust, and that's what Harmon Heating & Cooling is built on. As a family-owned, father-son operated business, Jon and Justin Harmon are personally invested in every installation, repair, and maintenance visit completed for Fishers homeowners.
