Miller Cooling and Heating
Proudly serving San Antonio and Southern Texas
Welcome to our Website
At Miller Cooling and Heating, we know that a properly working HVAC system is essential for your comfort and peace of mind. That’s why we provide expert HVAC repair, HVAC maintenance and HVAC installation services throughout San Antonio, TX and the surrounding areas. Our goal is to take the stress out of heating and cooling so you can focus on what matters most. To help prevent costly breakdowns, we also offer routine HVAC maintenance programs designed to keep your system running smoothly year-round. Whether you need emergency HVAC repair or a brand-new installation, our experienced team is here to help. Call today to speak with a knowledgeable technician and get a FREE estimate. We proudly serve San Antonio, Alamo Heights, Converse, Boerne, New Braunfels, Bexar County, Castroville, Leon Valley, Pleasanton, Floresville and beyond.
Air Conditioning
Outlast your South Texas summer in complete comfort with our full AC repair, maintenance, and installation expertise. Call now.
A/C Coverage: Residential ◇ Commercial ◇ Industrial ◇ Specialty ◇ Customized
A/C Services: Repairs ◇ Replacements ◇ Installations ◇ Maintenance ◇ Upgrades
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Heating
Keep warm without breaking the bank with our smart, caring plan for heating solutions. Let us handle your furnace, boiler, and more. Call now.
Heating Coverage: Residential ◇ Commercial ◇ Industrial ◇ Specialty ◇ Customized
Heating Services: Repairs ◇ Replacements ◇ Installations ◇ Maintenance ◇ Upgrades
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Thermostats
Your thermostat does two jobs: making you comfortable and saving energy wisely. When it is struggling, it is an emergency. We can help.
Thermostat Coverage: Residential ◇ Commercial ◇ Industrial ◇ Specialty ◇ Customized
Thermostat Services: Repairs ◇ Replacements ◇ Installations ◇ Maintenance ◇ Upgrades
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Professional Commercial HVAC Services in San Antonio & South Texas
Texas heat is no joke—and when you’re running a business, keeping your employees and customers comfortable isn’t optional, it’s essential. At Miller Cooling and Heating, we specialize in commercial HVAC repair, installation, and maintenance services to ensure your building always stays cool, efficient, and welcoming.
A reliable commercial air conditioning system doesn’t just keep temperatures under control—it also protects your indoor air quality. Over time, HVAC systems collect dust, debris, and pollutants in their filters and ductwork. Neglecting routine service can lead to clogged filters, poor airflow, and unpleasant odors that drive people away. In some cases, it can even trigger allergies, coughing, or respiratory discomfort for those inside.
Our expert commercial HVAC team helps businesses across San Antonio, Alamo Heights, Converse, New Braunfels, Boerne, Castroville, and surrounding South Texas areas maintain clean, comfortable indoor environments. From emergency AC repairs to customized maintenance plans designed for offices, retail spaces, restaurants, and industrial buildings, we keep your system performing at its best.