Business Details
50+ Years
experience
Emergency
services
Expert HVAC Solutions in St. Louis
For over a century, Design Aire has established itself as the premier HVAC company in the St. Louis metropolitan area. Founded in 1904 by Frank Fischer, our commitment to customer satisfaction and technical excellence has driven our reputation as the region's trusted heating and cooling experts. Our team of technicians boasts an average of 26 years of industry experience, supported by ongoing professional education and rigorous background checks to ensure safety and reliability. We specialize in comprehensive HVAC solutions, including furnace repair and installation, AC maintenance, boiler services, ductless systems, and advanced indoor air quality products.As the largest Trane dealer in the Midwest, we leverage exclusive equipment discounts and unparalleled expertise to deliver high-efficiency systems at competitive prices. Our dedication to transparency, ethical practices, and community trust has earned us recognition as a BBB Torch Award winner and multiple Angies List Super Service Awards. With 24/7 emergency service availability and a customer-first philosophy rooted in our founder's original motto of 'doing a good job at a fair price and treating people right,' we continue to serve over 100,000 homes across St. Louis, St. Charles, and surrounding counties.
Services
AC Repair
Furnace Maintenance
Trane Systems
Ductless Mini-Splits
Boiler Repair
Whole-House Humidifiers
Air Purifiers
Commercial HVAC
New Construction HVAC
Architectural Sheet Metal
Details
- Year established: 1904
Highlights and features
- We have over 100 years of HVAC experience serving St. Louis
- Our technicians average 26 years of industry expertise
- We provide 24/7 emergency HVAC services
- We are the largest Trane dealer in the Midwest
- Our staff undergoes background checks and drug testing
Associations and certifications
- Trane
- BBB A+ Rating
What people say
Professional staff
Timely service
Detailed explanations
Clean installations
Reliable technicians
Services
AC Repair
Our certified technicians provide prompt AC repair services for all makes and models. With 24/7 emergency availability, we address cooling system failures during peak summer months. Our expertise includes refrigerant leaks, compressor issues, and thermostat malfunctions. We use factory-authorized parts and diagnostic tools to restore optimal cooling performance while maintaining energy efficiency.
Furnace Maintenance
Preventive furnace maintenance plans improve system longevity and efficiency. Our technicians perform comprehensive inspections, cleaning, and calibration of burners, heat exchangers, and safety controls. Regular maintenance reduces breakdown risks and ensures safe operation during winter months while maintaining manufacturer warranty requirements.
Ductless Mini-Splits
We install and service energy-efficient ductless HVAC systems for homes without existing ductwork. Our Trane and Mitsubishi systems offer zoned temperature control with SEER ratings up to 22. Installation requires minimal structural modifications while providing whisper-quiet operation and improved indoor air quality through advanced filtration systems.
Whole-House Humidifiers
AprilAire whole-house humidifiers integrate with existing HVAC systems to maintain optimal moisture levels. Our installations prevent dry skin, reduce static electricity, and protect wood furnishings. Systems automatically adjust humidity levels between 30-60% for health benefits and energy savings through improved heating efficiency.
Commercial HVAC
Custom commercial HVAC solutions for new construction and retrofit projects. Our NATE-certified technicians handle large-scale installations, preventive maintenance contracts, and emergency repairs for office buildings, retail spaces, and industrial facilities. We specialize in energy-efficient systems that meet ASHRAE standards and local building codes.
Questions
What HVAC services do you offer?
We provide complete heating, cooling, and indoor air quality solutions including installation, repair, and maintenance for residential and commercial properties.
Are you available for emergency service?
Yes, our technicians are available 24 hours a day, 7 days a week for HVAC emergencies.
Do you service all HVAC brands?
We service all major HVAC brands but specialize in Trane and Mitsubishi equipment with factory-certified technicians.
What financing options are available?
We offer special financing through Wells Fargo Bank for qualified customers on new HVAC system installations.
How can I schedule service?
Call us at 314-739-1600 or use our online booking system to schedule appointments or request emergency service.
What areas do you serve?
We serve St. Louis, St. Charles, and surrounding counties including Jefferson, Franklin, and Madison counties.
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Reviews (3)
Tom Hayes
Oct 25, 2018
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I just had my furnace serviced by Gary. He always does an excellent job in keeping not only our furnace, but also our a/c in top notch condition! I trust Gary and his company Design Aire. Gary is just an outstanding technician and I trust him wholeheartedly!
Mary Clarkson
Jun 05, 2017
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Today Design Aire addressed my air conditioning system. I was very pleased with the prompt response to my call. The service man, Larry, was very professional. He informed me about the problem and presented options to solve my cooling problem. Service man was knowledgeable yet left the decision making to me. I will definitely hire Design Aire again as well as recommend them to friends.
Steve Stephanopoulos
Mar 22, 2017
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We had these guys put in new AC and Heat and we love every thing about it. This was at least three years ago and all is good.
