Free In-Home Consultation
A full system evaluation with measurement of heated square footage and room-by-room heating needs, so your furnace is matched to your home.
Expert Furnace Replacement With Efficiency You'll Feel
A new furnace is one of the best investments you can make in your home's comfort and safety. If your current furnace is aging, breaks down frequently, or leaves some rooms cold, upgrading to a modern, efficient system transforms how you live. Harmon Heating & Cooling installs quality furnaces from Armstrong Air, LG, and Climate Master, with guidance tailored to your home's size, layout, and budget.
A new furnace uses significantly less fuel than an aging one, delivering warmth more evenly and reliably. Our family-owned team handles the entire installation — sizing the system to your home, removing your old furnace, installing the new unit, venting safely, and testing everything thoroughly before we leave. You get a reliable heating system backed by a strong warranty and our 35+ years of experience.
Furnace selection depends on your home size, insulation, ductwork condition, and budget. If your current furnace still has life left, compare with our furnace repair option, or protect your new furnace with a maintenance plan.
Right-Sized Systems
35+ Years of Experience
Honest Efficiency Guidance
Armstrong Air Certified
Family-Owned & Local
Five steps from your first in-home assessment to a system you've watched us test before we leave.
We visit your home to understand your heating needs. We measure square footage, evaluate insulation, check your existing ductwork, and discuss comfort goals. We also review your heating bills to understand efficiency patterns. This data informs the right furnace selection for your situation.
We present furnace options that match your home and budget. We explain AFUE ratings, warranty lengths, and the payback timeline for higher-efficiency models. You get a detailed, honest quote with no surprises — pricing includes installation, old-unit removal, and testing.
Once you approve the quote, we order your furnace and schedule installation. A few days before arrival, we confirm access to the installation area, ensure it's ready, and answer any last-minute questions. Our technicians arrive with all tools and equipment needed.
Our licensed technicians remove your old furnace, carefully install the new unit, connect ductwork, run gas and electrical lines, verify the venting system, and integrate it with your thermostat. We follow manufacturer specifications exactly and meet all local codes. The installation typically takes one full day.
Before we finish, we run the furnace at full capacity to ensure proper heating, even air distribution, and thermostat response. We walk you through thermostat operation, filter replacement schedules, maintenance tips, and warranty coverage. You're fully prepared to operate your new system confidently.
From the first measurement to warranty registration, here's what our furnace installation service delivers.
A full system evaluation with measurement of heated square footage and room-by-room heating needs, so your furnace is matched to your home.
We assess ductwork condition and air-sealing opportunities, then recommend any upgrades that improve your new furnace's performance and efficiency.
Recommendations for 2–3 furnace models at different efficiency levels, with a written quote covering costs, warranty details, and installation timeline.
We safely disconnect and remove your old furnace, then install the new unit in the same location — or relocate it if that benefits your home.
Connection of ductwork, gas lines, and electrical components, venting inspection, and integration with your existing thermostat (upgrade available if needed).
A full-load system test verifies heat output and airflow, plus carbon monoxide and safety verification before we consider the job done.
Thermostat programming and operation walkthrough, your filter replacement schedule and part numbers, and a direct number to call with any questions.
We register your warranty with the manufacturer and provide all documentation, so your new furnace is fully protected from day one.
Your new furnace is a long-term investment. Protect it with our maintenance plan. Annual inspections and seasonal tune-ups keep your system running at peak efficiency, extend its lifespan, and help you avoid costly repairs down the road.
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.
We install new furnaces across Central Indiana. Fishers is our headquarters and primary service area, with Westfield just west, Noblesville to the north, Fortville to the east, and Pendleton and Carmel completing our service map.
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.
If your current furnace still has life left but needs a repair, we can help — and the same team handles your other furnace needs too.
A new furnace brings reliable warmth, lower heating bills, and peace of mind. Harmon Heating & Cooling guides you through every step — from sizing and selection to professional installation and long-term maintenance. Our family-owned team has installed hundreds of furnaces across Fishers and surrounding areas.
Call 317-588-8303 to request your free furnace installation quote. Flexible financing is available through Service Finance — spread the cost over manageable monthly payments.
