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St. Louis Heating & Cooling Experts

Always On Time...

  • ‘Round the Clock Availability

    No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.

  • 100% Satisfaction Guarantee

    We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.

  • StraightForward Pricing® Guide

    Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!

  • Always On Time…Or You Don’t Pay A Dime!®

    We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.

Get the Best Service Around

Our Happy Customers

Our Comfort Specialists are available to help, no matter the time of day. If you're in need of emergency services, we've got you covered 24/7.

  • “Brent quoted me a fair price on a replacement furnace & A/C in a side office off of the garage in my home and Nathan & Robert performed the removal & install. They were on time & professional every ...”

    - Wes V. | St. Louis, MO
  • “Bryan came out to do a furnace check - called in advance - was prompt - polite when arrived - put on booties to protect carpet - very thorough and did explain things to me. I would use them again and ...”

    - Lynn F. | St. Louis, MO
  • “Brett and his team did a fabulous job installing a new furnace and water heater for us. They were flexible with scheduling to meet our needs and the quality of work and clean up afterwards was superb. ...”

    - Craig S. | St. Louis, MO
  • “Friendly and quick service. The response time was impeccable. Tech was very informative to my questions. I'll use your services again in the future for routine maintenance.”

    - Stephanie D. | St. Louis, MO
  • “I've called on them twice now and have been impressed with how quickly they come and their ability to diagnose the problem. I think their prices are fair given how quickly they can resolve an issue. ...”

    - Art W. | St. Louis, MO

St. Louis Air Conditioning & Heating Services

Trusted HVAC Repair in St. Louis

Throughout the years, our St. Louis heating and AC professionals have developed strong relationships with customers because we care about your comfort. At One Hour Heating & Air Conditioning® of St. Louis, we’re always ready to help you with your heating and cooling issues, no matter how big or small. Whether you need help repairing your air conditioner, improving the air quality in your home, installing a new heater, there’s nothing our HVAC service team can’t handle.

We don’t simply make promises—we back up our work with a 100% satisfaction guarantee. Our UWIN Guarantee means we stand behind our parts, labor, and craftsmanship for two years past your service date! Our promise ensures all our heating and air conditioning solutions are designed to be long-term. We provide HVAC repair and installation services to residents in St. Louis, University City, Creve Coeur, Chesterfield, O'Fallon, Maryland Heights, Valley Park, Eureka, and nearby communities in Missouri.

Looking for a recommended Air Purifier? Visit our Air Quality service page or click this link below to check out the PremierOne Air Purifier.

Learn More About PremierOne
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100% Satisfaction Guaranteed

Heating & Cooling Repair, Replacement & Installations in St. Louis

Our HVAC service technicians are highly skilled, experienced, and knowledgeable in all things related to air conditioning and heating. They are background checked and drug-tested for your peace of mind. With our St. Louis heating and AC teams on your side, you can rest assured that we are reliable technicians that will deliver excellent quality services. Our priority is to ensure that you regain the comfort in your home. Reach out to our St. Louis HVAC repair team today so that we can inspect your air conditioning and heating problems!

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Frequently Asked Questions

  • What does the One Hour mean in your company name?

    The ‘One Hour’ in our company name indicates our guarantee to be at your home in the predetermined window quoted when you set your appointment. If we do not show up within that window, your service call fee is waived.

    1. Express Appointment: This is an appointment that is scheduled during a specified one-hour time slot. You are promised that a technician will arrive at your home within this one-hour time window. You will also receive a call when the technician is en route to your home.

    2. Reserved Appointment: This is an appointment that is scheduled during a specified, two-hour time slot. You are promised that a technician will arrive at your home within this two-hour time window. You will also receive a call when the technician is en route to your home.

    3. Standard Appointment: This is an appointment that is scheduled during a specified four-hour time slot. You are promised that a technician will arrive at your home within this four-hour time window. You will also receive a call when the technician is en route to your home.

    4. Stand-By Appointment: This appointment is for overflow situations. This appointment will not have a specified time. You will receive a call when the technician is en route to your home.

    5. Emergency Appointment: This appointment is for an unspecified time after normal business hours Monday – Saturday and all day on Sundays/Holidays. Calls are dispatched in the same order they are received. You will also receive a call when the technician is en route to your home.

  • Do you service emergencies after-hours?

    Yes, we offer emergency services 24-hours a day, year-round.
  • How much will my service cost?

    The size and complexity of your HVAC issue will determine the cost. Because our trained, licensed HVAC technicians must diagnose the issue before we are able to quote you an accurate cost, we require an appointment to be set to complete a diagnostic on your system. Once the diagnostic is complete, your One Hour(R) technician will walk you through all costs using our Straightforward Pricing(R) Guide so there are never any surprise fees.
  • How often should I service my HVAC system?

    It’s ideal to service your cooling system each spring and your heating system each fall to ensure you find small issues before they become big problems.
  • How often do I need to change my HVAC filter?

    Your filter should be changed every one to three months, depending on conditions in your home and your region’s climate.
  • Do you offer purchase financing?

    We work with several lending partners to ensure our customers are able to restore comfort in their homes. Ask your technician about your financing options.
  • What are the advantages of a smart thermostat?

    Smart thermostats learn a household's patterns and adjust heating and cooling according to when a home is occupied, give homeowners the ability to control the thermostat remotely, and enable homeowners to reduce their energy use, saving you money.
  • What is a SEER Rating?

    The SEER (seasonal energy efficiency ratio) is a measure of the efficiency of your heating and cooling system.The higher the SEER rating, the more efficiently a unit operates. The SEER rating of any given unit can range anywhere from 13 to 21.

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