
Furnace Installation in San Marcos, TX
Providing Reliable Furnace Installation In Unreliable Times
As times get tough, other companies cut corners. But we decided to stay reliable—for over 25 years. Call us for a furnace installation and you'll get:
- Reliable people—Since we constantly train our heating install techs, you can be 100% confident that your job will be done right—the first time.
- Reliable financing— High credit score? Low credit score? We can help people with either!
- Reliable relationships—Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.
Save $500 on Your Heating Installation
Schedule today and you'll get $500 off select high-efficiency systems.
How to redeem: Just mention the deal to your technician. No need to print!
The cost of a furnace installation in San Marcos, TX
The following factors determine the cost to install a furnace:
- Size: Furnace size is measured by BTUs. The higher the BTU output of a furnace, the bigger it is, and the more expensive it will be.
- Efficiency: More energy-efficient furnaces are also more expensive. A furnace’s efficiency level is indicated by its AFUE rating. (Higher AFUE = higher efficiency.)
- Comfort features: Furnaces with a more advanced blower motor or burner system will cost more.
- Warranty: If you opt for an extended parts and/or labor warranty, the total cost of the unit will be greater.
Signs you need a new furnace:
- Your furnace is 10+ years old. Unfortunately, furnaces don’t live forever—they usually only last 10–15 years. If your furnace has reached or passed its 10th birthday, it’s probably time to replace it.
- Your furnace is breaking down a lot. Frequent repairs are a sign that your furnace is getting ready to kick the bucket. And instead of wasting money on a furnace that’s about to die, you can put that money towards a new furnace system.
- You have consistently high energy bills. If your winter energy bills are consistently getting higher and higher, it could be a sign your furnace is aging and needs to be replaced. Older furnaces lose efficiency as they age, which makes your energy bills go up.
You can learn more about each of these factors by visiting our blog, “How Much Does it Cost to Install a Furnace in San Marcos?”
Want an accurate install price?
Contact us for an in-home estimate (it's free).
Providing furnace installs to San Marcos and these areas
Providing furnace installs to San Marcos and these areas
- Canyon Lake
- Buda
- Cibolo
- Fischer
- Garden Ridge
- Luling
- Lockhart
- Kyle
- Manchaca
- New Braunfels
- Schertz
- Seguin
- Universal City
- Wimberley
- Dripping Springs
How we work in 5 easy steps
Schedule your estimate
Schedule an in-home estimate online or call us at 512–396–8183. We schedule service in 2-hour windows, so you'll know around the time we'll arrive.
Notify you before we arrive
Your heating technician will call you when they're 30 minutes away, so you don’t have to wait around all day.
Give you a price
Once your tech arrives, they’ll investigate your furnace and do the calculations needed to determine the system size you need. Then, you'll get a price quote for the installation.
Install your system
We can usually get an installer to your home within 2 days to install a new furnace. If we can't get to you in time, we'll provide temporary heating or put you up in a hotel up to 3 days.
Make sure you're happy
We don't just dine and dash. After the installation, we call to get your feedback so we can ensure you're 100% satisfied.

See our furnace installation reviews in Texas
"Reliable Air has gained a customer for life!"
"Steve T did a phenomenal job explaining each task he was going to perform at my house. He never once made me feel pressured to invest in anything than what was necessary. He also took the time to give me tips on how to manage my system to make easier on the pocket. Reliable Air has gained a customer for life! "
-T. P.
"They are ‘reliable"
"Reliable Air put my central air and heat in my home many years ago, around 2007. I have had no problems with their punctuality, courtesy, and any work performed by ALL of their technicians. They identify themselves and are in uniform. They protect my carpets also. My unit is serviced two times a year through my maintenance contract with them. This last visit, the technician was very thorough with his inspection and replacement of a part. He explained the what and the why of all that he did. They are 'reliable.’"
-C. C.
Our 100% satisfaction guarantee
We do whatever it takes to make you happy (like, 3-day weekend happy). So, if you have any issues with our furnace installation, we'll make it right—even if that means giving you your money back.