Top-rated independent heating and cooling across north Georgia and the southern Appalachians
Furnace Installation in Kennesaw, GA — Book a Visit Today
If your furnace is cracked, rusted through, or the heat exchanger has been red tagged, you need equipment and not another part. We do furnace installation across Kennesaw on natural gas, propane and dual-fuel systems, and we size to the house rather than matching whatever was there in 1998. That means checking duct capacity, venting, combustion air and how the thermostat stages the backup heat. Ridge homes on propane get a different plan than valley homes on gas. Call us or use the quote form and tell us your fuel type and how the house heats now.
Call (888) 878-4879- Real people on the phone
- 7 days a week
- Quote in writing before any work
Taking calls until 5:00 PM ET
Common furnace installation faults in Kennesaw homes
- The furnace runs all evening and the back bedrooms never warm up Undersized or poorly ducted system, or a unit past its useful output
- We have had heating repair out three winters running Repeat failures on an aging heat exchanger, board or inducer motor
- It kicks on, runs two minutes, shuts off, then does it again Short cycling from oversizing, restricted return air or a failing limit switch
- There is a burnt or sooty smell when the heat starts Combustion or heat exchanger problem that needs inspection before any replacement talk
- Parts for our furnace are on backorder every time Obsolete equipment where replacement costs less over the season than another furnace repair
Search for it as furnace installation or furnace replacement and you land in the same place: one visit, one written quote.
Kennesaw coverage
From Kennesaw we also cover Acworth, Marietta, Woodstock, Dallas, Powder Springs and Kildare.
Other repairs we do in Kennesaw
- AC Repair
- Furnace Repair
- Heat Pump Repair
- AC Installation
- Ductwork Repair
- HVAC Maintenance
- Duct Cleaning
- Thermostat Installation
- Mini-Split Repair
- Indoor Air Quality
Furnace Installation in cities near Kennesaw
- Furnace Installation in Marietta
- Furnace Installation — Woodstock, GA
- Smyrna furnace installation
- Furnace Installation in Roswell
Furnace Installation service hub → · Kennesaw service directory →
Guides & troubleshooting
Independent HVAC company vs the big names in Kennesaw
| STM Heating & Air | Big-box repair chains | Handyman listings | |
|---|---|---|---|
| Quote in writing before a wrench comes out | ✓ | ✕ | ✕ |
| Phones answered by people, every day | ✓ | ✕ | ✓ |
| All major brands, gas and electric | ✓ | ✓ | ✕ |
| Independent company, nobody's quota | ✓ | ✕ | ✓ |
| Crews familiar with homes like yours | ✓ | ✕ | ✓ |
The same on every visit
The quote comes first, in writing
Covering 81 cities across Alabama, Georgia, Kentucky and 3 more.Phones answered by people
Open 7 days, 8:00 AM to 5:00 PM ET.Every major brand, gas and electric
Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.Furnace Installation in Kennesaw — quick answers
How do you decide what size furnace my house needs?
We measure the house rather than match the old nameplate. Square footage, insulation, window count, duct layout and how the house sits on the ridge all change the BTU load. Oversized furnaces short cycle and leave rooms uneven, so we size to the actual heat loss.
Should I repair my furnace or replace it?
If the heat exchanger is cracked, or the part is obsolete, or you have paid for heater repair two or three winters in a row on a unit well past its expected life, replacement usually makes more sense. We give you both numbers and let you decide.
How long does a furnace installation take?
Most straight swaps take a day. If we need to correct venting, resize a return, run new gas line or move the unit in a tight crawlspace, plan on two. We tell you which one you are before we start, not after.
What is a high-efficiency upgrade actually changing?
A high-efficiency furnace uses a sealed combustion process and PVC venting instead of a metal flue, plus a variable or multi-stage blower. That means new vent routing and a condensate drain. We check both are workable at your house before quoting the upgrade.
How soon can you get to my Kennesaw home?
Call us and we will tell you honestly where you sit in the day's schedule. Same-day visits are common in Kennesaw when a system is down, and we tighten arrival windows as the day goes so you are not sitting by the door all afternoon.
How it works
- Step 1
Tell us the symptom
Call or fill in the quote form and describe what you hear, smell or feel. Warm air, short cycling, a breaker that keeps tripping. That gives us a head start on the likely cause.
- Step 2
We diagnose on site
A technician checks the thermostat, airflow, electrical connections, refrigerant performance and the outdoor unit. We work the crawlspace and the attic too, because ductwork and drainage cause more trouble than people expect.
- Step 3
You decide, then we fix it
We explain what failed, what it takes to repair it, and what we would watch next season. No work starts until you say go. Most repairs finish the same visit when parts are on the truck.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Mixed heating is normal to usHeat pumps, propane furnaces and dual-fuel setups all behave differently in cold weather. We know how a heat pump should sound in the thirties and when the backup heat is doing too much of the work.
- We go under the houseRed clay crawlspaces hide crushed ducts, sweating lines and standing water. Comfort problems often start down there, not at the unit, so we look before we start replacing parts you may not need.
- Plain explanationsYou get told what broke and why, in words that make sense. If a repair is a short-term patch on an aging system, we say that out loud so you can plan instead of guessing.
- One crew, six statesWe serve homeowners across Alabama, Georgia, Kentucky, North Carolina, South Carolina and Tennessee. Same approach in every one: show up, diagnose properly, repair what needs repairing, leave the space clean.
- All major brands, gas & electricOne independent crew for Carrier, Trane, Lennox, Goodman, Rheem and more.
- Straight answersNot worth fixing? We say that out loud, and often it saves you the visit fee.
Furnace Installation in Kennesaw
The longer it sits broken, the more it takes from you
Tell us the symptom, sign off on the written quote, get the machine back. Starting takes a minute.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
Rather not call? Get a free quote →