Full-service HVAC for San Antonio's climate — not just your equipment, but your whole home's comfort.
New systems, emergency repairs, and tune-ups for every major brand. We size systems correctly for Texas heat.
It's not just the heat — it's the humidity. We design and install whole-home dehumidification systems.
Leaky ducts can cost you 20–30% in efficiency. We inspect, seal, and replace ductwork the right way.
When San Antonio winters turn cold fast, your heat needs to work. Repair, replacement, and annual tune-ups.
UV purifiers, air scrubbers, and filtration systems that remove allergens, mold spores, and pollutants.
Nest, Ecobee, and Honeywell installations. Control your comfort and cut your energy bill from your phone.
Derek Cantu started Lone Star in 2008 after a decade as a technician — watching too many San Antonio families get gouged by big franchises during August breakdowns. He built Lone Star around a simple idea: show up on time, tell the truth about what's wrong, and charge a fair price.
Every technician on our team is NATE-certified and background-checked. We don't pay commissions, so nobody has a reason to sell you something you don't need. Just honest diagnostics and work you can trust.
Our techs aren't paid to upsell. They're paid to fix your problem correctly.
Most HVAC companies treat humidity as an afterthought. We've built our whole approach around it.
Factory-trained on the brands built for extreme heat. Warranty-approved installations.
Flexible payment plans through Synchrony. Apply in minutes, get comfort today.
Derek served before he started swinging wrenches. That service mindset shows in how we run our business.
When your AC goes out in July, you can't wait a week. We keep slots open for same-day calls.
"AC went out on a Saturday in July. Derek had a tech at my house by noon. Fixed it same day, didn't try to sell me a new unit I didn't need. Lone Star has a customer for life."
"Three other companies told me I needed a full replacement. Lone Star found a bad capacitor and fixed it for $180. Honest people are hard to find. These guys are the real deal."
"Had them install a whole-home dehumidifier last spring. The difference in our house is night and day. Our AC runs less and the air actually feels clean. Worth every penny."
Free inspections. Same-day availability. No pressure quotes.