Furnace Replacement in Dayton, Ohio
Thinking about replacing your furnace? We’ll help you weigh your options and choose the right system — with honest advice and no pressure.
- Free In-Home Estimates
- GE Authorized Pro
- Financing Available
FREE
In-Home Estimate
Is It Time to Replace Your Furnace?
Check the boxes that sound like your situation. If several apply, it’s probably time to talk replacement.
Your furnace is 15–20 years old or more
Your heating bills keep climbing
Some rooms are colder than others
The burner flame is yellow instead of blue
You notice rust, cracks, or soot around the unit
You've had multiple repairs in the last couple of years
It struggles to keep up on the coldest days
It runs constantly but doesn't heat well
It makes strange noises or smells
You're planning to stay in your home for years to come
Checking several boxes? Let’s talk about your options — no obligation.
Repair or Replace? Let's Do the Math
Repair Makes Sense If
- Your system is under 10 years old
- It's a minor or isolated issue
- The repair cost is modest
- Your energy bills have been steady
Replace Makes Sense If
- Your system is 10–15+ years old
- Repairs are adding up or frequent
- Your energy bills keep climbing
- It struggles to keep up on cold days
The 50% Rule
If a repair would cost more than half the price of a new system, replacement usually makes more sense.
Choosing Your New Furnace
A new furnace is a long-term investment. Here’s what matters — and what we’ll walk you through.
Efficiency (AFUE)
Higher AFUE ratings mean lower heating bills. We'll show you the options and the real-world savings to expect.
Features & Comfort
Variable-speed blowers, smart thermostat compatibility, and zoning all affect how your home feels.
Brand & Quality
As a GE Authorized Pro, we install equipment we trust — and we service every major brand if you prefer another.
Warranty
We install systems backed by strong manufacturer warranties, and we stand behind our work on top of that.
Efficiency That Pays Off
Furnace efficiency is measured in AFUE — the percentage of fuel that becomes heat. An 80 AFUE furnace turns 80% of its gas into heat; a 96 AFUE furnace turns 96% into heat. The rest goes up the flue. We’ll show you the options and the real-world difference.
Lower Monthly Bills
A higher AFUE furnace turns more of your fuel into heat — so you burn less gas to stay warm, month after month.
Savings That Add Up
Over a 15–20 year system life, the energy savings from a high-efficiency furnace can offset much of the upfront cost difference.
Steadier Comfort
Modulating and variable-speed furnaces run at lower, steadier output — which means more even temperatures and fewer cold spots.
Less Fuel Used
Burning less gas is better for your wallet and the environment. A win-win you'll feel good about.
Proper Sizing Matters More Than Brand
The most common mistake in furnace replacement? Installing the same size as the old unit without checking if it’s actually right for your home.
We do a proper load calculation — measuring your home’s square footage, insulation, windows, and layout — to size your new system exactly right. Not too big, not too small.
Manual J load calculation — done right, every time.
Too Big (Oversized)
- Short-cycles — blasts heat then shuts off, leaving temperature swings
- Wastes energy with frequent on/off cycling
- More wear and tear on the system
Too Small (Undersized)
- Runs constantly but can't keep up on cold days
- High energy bills from overworking
- Shorter equipment lifespan
Sized Right
- Even, consistent heat throughout your home
- Steadier temperatures and better comfort
- Lower bills and longer system life
GE Equipment, Installed Right
We’re a GE Authorized HVAC Pro — one of the few in the Dayton region. That means factory-trained installations and equipment we genuinely trust. When you’re investing in a new system, the quality of the equipment and the installer both matter.
- Reliable, efficient equipment built to last
- Strong manufacturer warranties, backed by us
- Factory-trained, factory-authorized installations
- We install and service all major brands, too
Financing That Works for You
A new furnace is a big investment. We offer flexible financing so you can spread the cost into manageable monthly payments.
Flexible Monthly Payments
Don't put off comfort because of the upfront cost. We'll walk you through financing options that fit your budget — often with low monthly payments.
Financing Special
HEATING & COOLING
0% for 60 Mo.
GE HVAC System Replacement
0% financing for 60 months on a complete GE HVAC system replacement.
The Replacement Process
From first call to warm air, here’s exactly what to expect.
Free In-Home Estimate
We assess your home, your current system, and your comfort needs — then give you honest options and upfront pricing.
System Selection
We help you choose the right equipment, efficiency level, and features for your home and budget.
Scheduling
We pick an installation day that works for you and confirm everything ahead of time.
Installation Day
Our team arrives, protects your home, and installs your new system — clean, professional, usually in one day.
Cleanup
We remove the old system, haul away all debris, and leave your home as clean as we found it.
Walk-Through & Follow-Up
We test everything, show you how your new system works, and follow up to make sure you're happy.
What Happens to Your Old System
You don’t have to worry about the old equipment. We handle all of it.
Full Removal
We disconnect and remove your old furnace and any related components.
Hauled Away
We load everything up and take it with us. You don't lift a finger or deal with disposal.
Properly Recycled
Metal components are recycled and disposed of safely — never dumped.
Old system gone, new system running, home left clean — all in one day, typically.
AC Replacement Reviews
5.0 · Google Reviews
“When our 18-year-old furnace finally gave out, Gem City walked us through replacement options without any pressure. They helped us pick a high-efficiency system that fit our budget, and the installation was clean and fast. Our new GE furnace is noticeably quieter and our bills dropped.”
Robert P.
Centerville, OH
“I appreciated that they actually did a load calculation instead of just swapping in the same size unit. The new system heats the whole house evenly — even the back bedroom that was always cold. Worth every penny.”
Linda H.
Beavercreek, OH
“From the free estimate to the final walk-through, the whole replacement process was smooth. They hauled away the old unit, cleaned up everything, and showed us how the new thermostat works. True professionals.”
Tom and Karen B.
Kettering, OH
Related Heating Services
Furnace Installation
New system installs done clean and right.
Furnace Replacement
Upgrade to a more efficient system.
Furnace Maintenance
Tune-ups that prevent breakdowns.
Emergency Heating Repair
No-heat emergencies get priority.
Furnace Replacement Questions, Answered
How much does a new furnace cost?
It depends on the size of your home, the system you choose, and the efficiency level. That’s exactly why we offer free in-home estimates — we’ll assess your home and give you upfront pricing with no obligation.
How long does a furnace replacement take?
Most replacements are completed in a single day. Larger or more complex jobs may take longer, but we’ll tell you the timeline upfront so you know what to expect.
How do I know what size furnace I need?
We do a proper load calculation (Manual J) that accounts for your home’s square footage, insulation, windows, and layout. We never just swap in the same size as the old unit — we size it right for your home.
How long do new furnaces last?
A well-installed, well-maintained furnace typically lasts 15–20 years or more. Regular maintenance is the biggest factor in getting the full life out of your investment.
Is a more efficient furnace worth it?
Often, yes. Higher-efficiency (higher AFUE) systems cost more upfront but can significantly lower your monthly heating bills. We’ll show you the real-world savings so you can decide what makes sense for your budget.
Do you offer financing?
Yes. We offer flexible financing options — including 0% for 60 months on a complete GE HVAC system replacement — to spread the cost into manageable monthly payments. Ask us and we’ll walk you through what’s available.
What do you do with my old furnace?
We remove it, haul it away, and recycle the components. You don’t have to deal with any of it.
What brands do you install?
We’re a GE Authorized HVAC Pro and install GE equipment, but we also install and service all major brands. We’ll recommend the best system for your home and budget.
Ready for a New Furnace? Let's Talk.
Free in-home estimate, honest advice, and no pressure. We’ll help you choose the right system for your home and budget.