Hours: We are open 24/7

2183 West Terra Lane, O'fallon, MO 63366

(314) 513-0385

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Indoor air quality has a major impact on the health, cleanliness, and comfort of your indoor living and working space.  Unfortunately, your home or office could very well provide a welcoming environment for billions of unseen and unwanted guests.  Contaminants such as dust mites, mold, mildew, pollen, pet dander, fumes, and tobacco smoke can usually be found in every room of the average home.  Considering the importance of the air you breathe, it only makes sense to take proactive measures for improvement.  Reliable Heating and Cooling offers free in-home consultations with one of our air quality specialists.  We’ll analyze your indoor conditions and provide accurate findings and effective recommendations.

Reliable Indoor Air Quality Solutions

With consistently rising utility costs, consumers are sealing up every possible crack, leak, and draft to prevent energy waste.  Unfortunately, as pollutants are trapped and continually circulated throughout the rooms of your home or office, air quality suffers.  And since the majority of Americans spend 90% of their time indoors, the cleanliness of breathing air is a big concern.  As a Carrier Factory Authorized Dealer, Reliable Heating and Cooling brings you innovative technology in a range of proven products.  We identify and target your specific problem, and make improvements.  You’ll sleep better, breathe easier, feel better, and take advantage of a more enjoyable home or office.  As an added bonus, you’ll also save money by reducing the wear and tear and workload on HVAC equipment.

Call Reliable Heating and Cooling for indoor air quality services and product installations!
O Fallon, Saint Peters, Lake Saint Louis, Wentzville, and Saint Charles, MO

Problems with air quality have been linked to health problems such as headaches, eye irritation, nausea, allergies, fatigue, asthma, respiratory infections, eczema, psoriasis, and more. Let us answer the challenge with affordable solutions that deliver immediate and sustainable results.  Call Reliable Heating and Cooling today for a convenient appointment time.  Our NATE-certified technicians are always available to discuss options and help you determine the right choice for your requirements.

Some of our many options include:

  • Air Filtration Products – These sophisticated systems clean your indoor air up to eight times an hour, trapping contaminants that could slip right through the eye of a needle. Air purifiers protect your home, HVAC equipment, and lungs from harmful airborne allergens and pathogens.
  • Fresh Air Ventilators – The introduction of fresh, outside air is essential to a healthy indoor environment.  These systems precondition incoming air to prevent energy waste, while offering all the benefits of opening a window.
  • Humidifiers – Introducing necessary moisture into heated indoor air protects furniture and wood floors, reduces static electricity that damages electronics, and defends against psoriasis, eczema, bloody noses, dry hair and more.  You’ll enjoy ideal comfort at lower thermostat settings for rewarding cost-savings.
  • Ultra Violet Lights – Incorporated into your existing HVAC systems, UV lamps have been proven to reduce concentrations of airborne bioaerosols by 50% within 45 minutes.  Along with superior air quality throughout your entire home, these units boost efficiency and lengthen the lifespan of your HVAC system, eliminating the need for chemical coil cleaning.
  • Carbon Monoxide Detectors – Known as the silent killer, carbon monoxide is odorless, tasteless, and invisible to the human eye.  The inexpensive installation of a carbon monoxide detector is the key to peace of mind.
  • Zoning and Programmable Thermostats – By targeting individual rooms in your home or commercial facility, and adapting operation to your regular schedule, you’ll not only achieve superior comfort but significant cost-savings as well.

Indoor Air Quality O Fallon, MO & Indoor Air Quality Testing Saint Peters, MO

At Reliable Heating and Cooling We Offer a Variety of HVAC Services:
Heating Installation
Heating Repair
Heating Service
Air Conditioning Service
Air Conditioning Repair
Air Conditioning Installation

Indoor Air Quality & Indoor Air Quality Testing O Fallon, MO, Saint Peters, MO, Lake Saint Louis, MO, Wentzville, MO & Saint Charles, MO

Indoor Air Quality O Fallon, MO & Indoor Air Quality Testing Saint Peters, MO

Indoor Air Quality TestingIndoor Air Quality ∴ Saint Charles, MO ∴ Saint Peters, MO ∴ O Fallon, MO

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Customer Reviews
What our customers are saying

We have used Reliable Heating and cooling for all of our heating and cooling needs. We needed some water heater work and Ralph came out and took care of it right away. Ralph was very professional and knowledgeable. He got the job done very quickly and everything is working great! I always recommend Reliable to family and friends. They truly are Reliable!

Chris Lopez

Have been with them for more than 10 years. They provide exceptional service…from the time they call to remind you about setting an appointment to the actual service day. Derek (and all their other technicians) are knowledgeable, professional, prompt, and open to listening to questions and pay attention to details. Never had a problem with anything. Thank you for a job well done. Good pricing.

Seema Chouhan

I had a system malfunction on Sunday evening December 12, 2022 on my Carrier Infinity ICS purchased in 2008.I am a first time caller to Reliable. Marty called me back and had his Tech dispatched at 8 AM the next day. The unit had failed and was dangerous to use. He had a new system by the next morning. They installed it and I was completely satisfied with their service and response time. I overwhelmingly recommend Reliable and will be using them from now on.


Had a small gas leak for a property I was helping a friend sell and we found out late last night. We reached out to Reliable H&C and Derrick was over first thing in the morning. He was friendly, professional and knowledgeable. He answered my questions with a smile. Derrick was a rock star. Will absolutely call him again. Bravo

Connor Kapp

We had a emergency water leak problem with our AC unit in the basement of our recently purchased condo. Called Reliable and Derrick was there within a couple of hours. He was polite, knowledgeable, and friendly. Derrick quickly found the problem and repaired it. He also checked the system overall, pointed our some concerns and answered all my questions. I can’t say enough about how satisfied we were with Derrick and Reliable Heating & Cooling! We would definitely recommend them!!! Thanks again!!!!

Terry Mills

Reliable has installed and maintained our last 2 furnaces and AC. Our experience with them has been great. Just yesterday we had an issue with our AC. I talked to Marty and he said he’d have someone out the next day. They even were able to accommodate us with an afternoon call. Derrick arrived promptly on time and had us up and going again in 15 minutes (bad capacitor on the condenser unit fan motor). With the prediction of high 90 temps, we were so thankful to have AC working again.

Keith Scherer

Chesterfield, MO

Moscow Mills, MO

Cottleville, MO

Winfield, MO