Right-Sized Cooling, Quality Equipment, Professional Installation
A successful installation starts with understanding your home's unique cooling load and comfort priorities. We begin with a no-pressure conversation about how you currently use cooling — how often you run the AC, which rooms heat up fastest, and how your energy bills look. We visit your home to measure square footage, assess insulation, note window placement, and evaluate your current ductwork. Then we explain efficiency levels (SEER ratings), show you the price difference between standard and high-efficiency units, and discuss financing options.
The goal is to ensure your new AC investment matches your home's real needs — not oversized (which cycles frequently and wastes energy), not undersized (which can't keep up on hot days), and equipped with an efficiency level that balances upfront cost against monthly energy savings.
Want to explore whether AC repair might solve your current problem before investing in replacement? Or interested in ductless mini-split cooling as an alternative for room-by-room comfort control? We can review all paths to better cooling.
Room-by-Room Sizing
35+ Years of Experience
Transparent Pricing
Armstrong Air Dealer
Local to Fishers
Six steps from your first assessment to a system you've watched us test and hand off.
We walk through your home and gather the details that drive sizing — room dimensions, window placement, ductwork condition, insulation, and your cooling habits. We also ask about the home's age, construction, and recent renovations. From this we calculate your true cooling load in BTUs using industry load-calculation software.
Based on the load calculation, we recommend an appropriately sized unit — typically a 3–4 ton system for a 2,000 sq. ft. Indiana home, but exact sizing varies. We present efficiency tiers (SEER 14, 16, 18+) so you can see the upfront cost difference and estimated monthly savings, and explain the trade-offs.
Old or leaky ducts undermine a new unit's efficiency — you can lose 20% of cooling to leaks. We inspect your ducts, often with cameras, and recommend sealing with mastic and tape, adding insulation wrap, or replacing sections if needed. Well-sealed ductwork is as important as the new unit itself.
You get a detailed estimate covering the outdoor condenser, indoor coil, all ductwork modifications, electrical work, refrigerant charging, thermostat, and labor. We show you the total investment, discuss Service Finance payment options, and confirm the timeline — typically one to two weeks from approval to completion.
Once you approve, we order the equipment (usually a few business days) and schedule the installation. We remove the old unit carefully, set the new condenser on a level pad, install the indoor coil, run new refrigerant lines, make all electrical connections to code, and test each step. The work typically takes one to two days.
We charge refrigerant to the exact manufacturer specification — not overfilled, not underfilled. We run a full cooling cycle, verify cold air from every vent, measure outlet temperatures, and calibrate your thermostat. Before we leave, you get the manual, warranty paperwork, a duct schematic, and clear filter and maintenance guidance.
The difference between a quality installation and a rushed one becomes clear within the first summer — a proper install runs efficiently, cools evenly, and operates quietly.
An AC must be charged to the exact amount specified by the manufacturer. Overcharging damages the compressor and reduces efficiency; undercharging leaves your home warm. We measure and charge to spec using industry gauges and load calculations.
Leaky ducts waste 15–30% of your cooling. We seal all ductwork connections with mastic sealant and fiberglass tape, then test the ducts for leakage — so every dollar you spend on cooling goes toward comfort, not waste.
The outdoor condenser must sit level, in shade when possible, away from airflow obstructions. The indoor coil must drain freely and stay accessible for cleaning. Poor placement reduces efficiency and shortens equipment life.
AC installations require proper circuit sizing, grounding, disconnect switches, and thermostat wiring. We run all electrical to code so your system is safe and reliable — any licensed electrician can verify our work.
Your thermostat controls comfort and efficiency. We program and verify it so your AC maintains your desired temperature without short-cycling or running excessively — a properly set thermostat makes a 5–10% difference in energy costs.
Installation quality is why homeowners choose a licensed contractor over DIY or an unlicensed handyman. Your new AC deserves professional installation backed by a warranty and a contractor who stands behind their work. Learn more about Harmon.
After your new AC installation, a maintenance plan protects your investment — annual spring tune-ups keep the system efficient, catch worn parts early, and extend the unit's life. Discover our maintenance plan and keep your new cooling system running at peak performance.
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 central air conditioning systems across Central Indiana. Fishers is our home base, with Westfield just west, Noblesville north and east, Fortville in our southeast territory, Pendleton to the south, and Carmel to the north.
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.
Need to repair an existing system first, or not sure which service you need? These are the paths we can walk you through, and the same team handles all of them.
Properly installed central air conditioning keeps your home cool, comfortable, and energy-efficient for a decade or more. We've been installing cooling systems in central Indiana for 35+ years, and we stand behind our workmanship on every installation alongside the genuine manufacturer equipment warranties.
Call 317-588-8303 to schedule a cooling load assessment and equipment consultation — no obligation, no sales pressure.
