Existing homes · Killeen · Temple · Belton · Georgetown
Residential HVAC Changeouts
in Killeen, Temple & Georgetown
If the air conditioner or heater in your existing home is worn out, needs frequent repairs or can’t keep up, a residential changeout — a full system replacement — may be the better path. Ellis Air Systems replaces heating and air conditioning systems for homes in Killeen, Belton, Temple, Georgetown and nearby Central Texas towns. We offer free estimates on system replacements, financing through Regions and Microf, and a lifetime workmanship warranty on the install. Family-owned since 1988.
Is It Time to Replace the System?
Most of the time, a repair is the right call. Replacement starts to make more sense when several of these line up:
- The system is older. Systems 12+ years old lose efficiency and start costing more to run. If yours is that age or needs frequent repairs, replacing it may lower your energy bills and repair costs.
- It needs a major repair, or the same system keeps breaking down.
- It uses R-22 refrigerant, energy bills keep climbing, or rooms stay hot or humid.
Our technicians give honest repair-or-replace guidance, with no pressure. A good first step is our repair or replace questionnaire. You can also read our general AC installation and replacement page.
This page is for existing homes
If you’re building a new home, see residential new construction. For a business, see commercial changeouts. This page is part of our HVAC system installation section.
Request service onlineWhat’s Included in a Residential Changeout
A new system should be sized for your home, not just matched to the old unit.
Right-sized for your home
The right size depends on your home’s square footage, insulation, windows, ductwork and how you use it, so it isn’t always the same as the old unit. An oversized system can short-cycle and leave the air clammy. An undersized one runs constantly in Central Texas summers.
Ducts and comfort problems
Hot rooms, weak airflow and uneven temperatures can come from ductwork as well as equipment. Tell us about the comfort problems you’ve noticed so we can take them into account.
System types and brands
We install complete heating and cooling systems, including heat pumps and ductless mini-splits, from Amana, Lennox, Trane, Goodman, Rheem, Ruud, Tempstar, American Standard, Carrier, Daikin and all other major brands. See our heat pump page or ask your technician.
Warranty, financing and military discount
Installations are backed by our lifetime workmanship warranty; ask your local office for the details that apply to your system. Financing for residential system replacements is available through Regions and Microf. Military members and first responders get 5% off full system replacements plus 10% off repair parts (labor not included). That discount can’t be combined with Cool Club.
How a Residential Changeout Typically Goes
From the first call through registration and Cool Club follow-up.
- 1Tell us what’s going on.Call the office nearest you or request service online. If you’re still deciding, start with the repair or replace questionnaire.
- 2Get a clear recommendation.A technician looks at the existing system and talks through repair versus replacement in plain English. We offer free estimates on residential system replacements.
- 3Choose a right-sized system.We’ll discuss sizing, brands and options, including financing if you want to spread out the cost. You can also try our energy savings calculator (results are estimates only; actual savings vary).
- 4Our own crews complete the replacement.We’ve been installing systems since 1988, the correct way, with no shortcuts.
- 5Register and maintain the new system.Register the equipment with the manufacturer, change filters regularly, and schedule maintenance twice a year. Cool Club members get a fall visit (September–November) and a spring visit (February–April), a 21-point checkup and 10% off parts (labor not included). You can also register your system with us.
Why Central Texas Chooses Ellis Air for New Systems
The Ellis family has built this company on straightforward advice and work done right, with no shortcuts and no upsells you don’t need. As Fred Ellis puts it: “We sell service, not excuses.”
- Family-owned and operated since 1988 — all department heads are Ellis family members
- Voted Best in Central Texas 2011–2026, with three local offices in Killeen, Temple and Georgetown
- Licensed (TACLB008510E, TACLA00071943C), insured and manufacturer-certified technicians with in-house training
- All major brands, so we’re never locked into one product line. Every job is backed by our lifetime workmanship warranty. Ask your local office for the details that apply to the job.
- Financing for residential system replacements is available through Regions and Microf. See our financing page or apply for Microf financing.
- Military and first responders: 5% off full system replacements plus 10% off repair parts (labor not included). Can’t be combined with Cool Club.
Ellis Air Systems
Limited after-hours slots available, call to check availability.
Residential HVAC Changeout Questions
Quick answers if you’re replacing a system in an existing home.
How do I know it’s time to replace my AC or heater?
Common signs are an older system that needs a major repair, repeated breakdowns, R-22 refrigerant, rising energy bills and rooms that stay hot or humid. Our repair or replace questionnaire can help, and a technician can give you honest advice.
Do you offer free estimates on system replacements?
Yes. Ellis Air offers free estimates on residential system replacements. Request service online or call the office nearest you.
What size system does my home need?
It depends on your home’s square footage, insulation, windows, ductwork and how you use it, so the right size isn’t always the same as your old unit. We’ll talk through sizing with you before you choose a system.
Do you offer financing or a military discount on a replacement?
Yes. Financing for residential system replacements is available through Regions and Microf. Military members and first responders get 5% off full system replacements plus 10% off repair parts (labor not included). That discount can’t be combined with Cool Club.
What does the lifetime workmanship warranty cover?
Our installations are backed by a lifetime workmanship warranty. Call your local Ellis Air office and ask for the details that apply to your installation.
Talk With Your Local Ellis Air Office
Request service online or call the office nearest you. All three offices are open Monday–Friday, 8 AM–5 PM. Limited after-hours slots available, call to check availability.
Killeen
Temple / Belton
Georgetown
All three offices are open Monday–Friday, 8 AM–5 PM. Limited after-hours slots available, call to check availability.
Ready for a Residential System Replacement?
We sell service, not excuses. Office hours Monday–Friday, 8 AM–5 PM. Limited after-hours slots available, call to check availability.