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Family-Owned HVAC & Plumbing Experts Serving Belleville, O'Fallon & The Surrounding Metro East Area Since 1959

Thank You for 65 Years of Trust!

It's thanks to your loyalty that we've been able to innovate, grow, and adapt to changing times. Your trust in our products/services inspires us to push the boundaries and deliver nothing short of the best. 

As we look back on the milestones we've achieved together, we are filled with pride and appreciation for the role you've played in our success story. We cherish the memories we've created over the years with all of our clients. 

As we embark on the next chapter of our journey, we do so with immense gratitude for your continued partnership. Together, we'll continue to strive for excellence and create shared success for many more years to come.

Thank you for 65 years of unwavering support, trust, and collaboration.

Belleville Heating, Air Conditioning & Plumbing Experts

Serving Throughout the Metro East Area

Has your heater given out? Is your air conditioner sweating the summer months? Has a plumbing leak sent you scrambling to find the buckets again? These are just a few of the issues that the experienced technicians from Bel-O Cooling & Heating can help you with. We offer a full range of services for some of your home’s most important mechanical systems, including comprehensive repairs, new installations, and so much more. Whether you need a simple fix or a total overhaul, no job is too large or too small for us to handle.

Commonly Asked Questions

  • What are the common signs that my HVAC system needs repair?
    Common signs include strange noises, weak airflow, uneven heating or cooling, and sudden spikes in energy bills.
  • How often should I have my HVAC system inspected and maintained?

    It's recommended to have your HVAC system inspected and maintained at least once a year, ideally before the start of the heating and cooling seasons.

  • What are some simple maintenance tasks I can perform to keep my HVAC system running efficiently?

    Simple tasks include regularly changing air filters, keeping the outdoor unit clear of debris, and ensuring that the indoor vents are unobstructed.

  • What should I consider when choosing a new HVAC system for my home?

    Consider factors such as the size and layout of your home, energy efficiency ratings, and the reputation of the HVAC manufacturer.

  • How can I improve the energy efficiency of my HVAC system?

    You can improve energy efficiency by sealing air leaks, installing a programmable thermostat, and ensuring that your HVAC system is properly sized for your home.

  • "Couldn't wish for a better company and employee to service my home heating and cooling."

    Couldn't wish for a better company and employee to service my home heating and cooling. Appointments are made with only a minimal wait, calls ahead of arrival and professional service by employees make me call this company each year. Loren Is the BEST.
    - Karen H.
  • "Jason was professional and courteous."

    Jason was professional and courteous. He listened to what the problem was and then explained what he needed to do to fix it. He answered all my questions and cleared the clogged basement drain. He also recommended what I could do to help keep the drain clear in the future. Thank you Jason!
    - Sue S
  • "They replaced my sump pump."
    They replaced my sump pump. They came in the day I called, did the work quickly and well, with a better product than I had before. Very friendly. Explained what they were doing.
    - Rick H.
  • "Anthony thoroughly checked the gas water heater for proper operation"
    Anthony thoroughly checked the gas water heater for proper operation and lit the pilot light. He took time to answer our questions and investigated what caused the issue. He was friendly and helpful. We appreciate the great service.
    - Becky G
  • "Jason was on time, polite, and professional."

    Jason was on time, polite, and professional. He had the old water heater out and the new one installed very quickly and efficiently. There was minimum disruption to our household, and we were back to functional in no time and no inconvenience.
    - Wayne S
  • "What a great value for the peace of mind!"
    We recently had a technician out to do a maintenance and cleaning of our furnace.The experience was great as he took his time to clean and inspect the system and to go over any findings/recommendations he had for us. We took advantage of the great maintenance plan they offer and look forward to having them back out in the spring to maintenance the AC. What a great value for the peace of mind!
    - Stephanie S.
  • "Wonderful to work with. Fast and very professional."

    Wonderful to work with. Fast and very professional. Mitch the tech was very nice and did a great job. Thank you so much!

    - Karen B.
  • "We have been and are VERY pleased to be a VERY satisfied customer!"
    BEL-O has been our AC and Furnace service provider since our previous home was built in 2004. Their technicians have ALWAYS been clean, competent, and caring about the service they have provided and how they treat us as customers. We have been and are VERY pleased to be a VERY satisfied customer!
    - Pete. B
  • HomeAdvisor Screened & Approved
  • BBB A+ Accredited Business
  • Carrier Factory Authorized Dealer
  • Carrier President's Award
  • NATE
  • Sheet Metal Workers' International Association
  • Southern Illinois Builders Association
  • O'Fallon - Shiloh Chamber of Commerce Member
  • Plumbers & Pipefitters Local 101 - Belleville, Illinois
  • Daikin DCP Accredited

Your Trusted Choice for HVAC & Plumbing

Local HVAC Professionals

Whether your heater has given out or your air conditioner is struggling, you can count on our Belleville heating and air conditioning pros to solve the problem. For years, we have delivered world-class results, and we’re proud to carry on that tradition with every customer. We service all types of heating systems, and even offer new installations for those who are looking for a more energy-efficient alternative for the future.

We offer all of the following:

  • Air conditioning and heating repairs
  • Air conditioning and heating installations
  • HVAC maintenance
  • Indoor air quality products

Bel-O Cooling & Heating is proud to be a Carrier Factory Authorized Dealer, and we utilize premium products from Carrier, one of the most prestigious manufacturers in the industry.

Carrier Logo

Expert HVAC Repair Services

When your HVAC system is in need of repair, you can trust the experienced team at Bel-O Cooling & Heating to provide reliable and efficient service. Our HVAC professionals are equipped to handle a wide range of repairs, from minor issues to major system malfunctions. We understand the importance of a properly functioning HVAC system, especially during extreme weather conditions, and we are committed to ensuring your home stays comfortable year-round.

Our HVAC repair services include:

  • Diagnosis of system problems
  • Repair of faulty components
  • System maintenance and tune-ups
  • Emergency repair services

Don't let a malfunctioning HVAC system disrupt your comfort. Contact Bel-O Cooling & Heating for expert HVAC repair services you can rely on.

Dependable Plumbing Solutions

Has a pipe sprung a leak somewhere in your home? Does your sewer line have a serious issue? If you’re sick of hard water or need a new water heater, turn to the experts from Bel-O Cooling & Heating for a job done right! We have seen and handled a wide variety of pluming problems, and we have the training and tools to handle it the right way as soon as possible. Every plumbing problem always receives the same great customer service experience we have always provided for all of our customers, and we continue to hold ourselves to the same lofty quality standards you have come to depend on us for.


What Sets Us Apart

  • Third Generation, Family-Owned Since 1959

    Our grandfather started this business to serve his community decades ago, and we take the same pride in that service. 

  • Decades and Decades of Industry Experience

    Since we opened, we've prioritized expertise in both traditional and innovative industry practices to serve you better. 

  • Honest & Transparent Technicians Who Never Oversell

    We want to provide you with a number of solutions and help you pick the right one for you, not the right one for us. 

  • Full Capability One-Stop Shop for Heating & Cooling

    From keeping the air in your home safe and cool to manufacturing sheet metal, you are in capable hands. 

Why Choose Bel-O Cooling & Heating?

Bel-O Cooling & Heating has been a family-owned and operated company since we opened our doors in 1959 under the name Belleville O’Fallon Heating & Cooling Inc. Brothers Leo and Paul Lugge learned the value of hard work and commitment at an early age and passed them on to the second and now third generation. Today, we proudly hold true to the same “founding fathers” ideals of superior customer service, great value, and friendly service.

See for yourself why so many customers turn to Bel-O Cooling & Heating for all of their needs! Call Bel-o Cooling & Heating at (618) 400-0905 to schedule your appointment.

Contact Us Today

Expert Technicians Providing HVAC & Plumbing Solutions for Residential and Commercial Properties
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About Belleville

Founded in 1814, the city of Belleville celebrated its bicentennial in 2014. As one of the oldest cities in Illinois, Belleville is home to a thriving public square, multiple museums, the stunning Cathedral of St. Peter, and the Belle-Clair Fairgrounds and Expo Center. Belleville is also the birthplace of the country’s second-oldest orchestra – the Philharmonic Society of Belleville has been bringing music and culture to the community since 1866! There are currently over 40,000 people living in Belleville, and it continues to live up to its name, which is French for “beautiful city”.

Friendly Financing Options

Don’t blow out your budget or drain your savings to get the service you need—with Bel-O Cooling & Heating, you can get high-quality solutions along with friendly financing terms with approved credit. By working with recognized and stable lenders, we offer great products with outstanding perks. Plus, with direct funding, your project will be underway as soon as possible!