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.
Online Special

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

Low Cost$2,500
Average Cost$5,500
High Cost$7,500+

Want an accurate install price?

Contact us for an in-home estimate (it's free).

Service Area

Providing furnace installs to San Marcos and these areas

Reliable Air Texas
How It works

How we work in 5 easy steps

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

How we work
Customer Reviews

See our furnace installation reviews in Texas

4 stars on Yelp
4.8 stars on Google

"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.

Reliable Air Van

Ready? Y'all give us a ring!