Trusted HVAC Services in St. Louis, MO
Keeping your home or business comfortable throughout the changing seasons in St. Louis requires a heating and cooling system you can rely on. At Hely Heating and Air Conditioning, we have been serving the St. Louis community and surrounding areas with expert HVAC solutions since 1969. We understand the unique climate challenges here, from humid summer heat waves to freezing winter temperatures, and we provide tailored services to keep your indoor environment consistently comfortable, efficient, and safe.
Whether you're facing an unexpected breakdown, considering a system upgrade, or looking for preventative maintenance, our team of experienced, local professionals is here to help. We are committed to delivering reliable, high-quality HVAC services that address your specific needs, ensuring lasting comfort and peace of mind.
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Why Choose Hely Heating and Air Conditioning in St. Louis?
For over five decades, Hely Heating and Air Conditioning has been a trusted name in HVAC across St. Louis and Jefferson Counties. Our deep roots in the community mean we have firsthand knowledge of the diverse types of homes and businesses in the area, from historic properties to modern constructions. This local expertise allows us to accurately diagnose issues, recommend appropriate solutions, and perform installations that are perfectly suited to the demands of the St. Louis climate.
Our technicians are not just skilled; they are dedicated professionals with an average of over 15 years with our company. This unparalleled experience ensures that every job, whether a complex repair or a full system installation, is completed with precision and care. We are proud to partner with leading manufacturers like Goodman, part of the Daikin family, offering robust systems backed by strong warranties. Our commitment is to provide reliable service and lasting value to our neighbors in St. Louis. Learn more about our history and team on our About page.

Comprehensive HVAC Services for St. Louis Properties
We offer a full spectrum of heating, ventilation, and air conditioning services designed to meet every need of your St. Louis home or business. Our goal is to be your single source for comfort solutions, from urgent repairs to routine maintenance and complete system replacements.
Expert HVAC Repair in St. Louis
When your heating or cooling system malfunctions, it can quickly disrupt your comfort, especially during extreme St. Louis weather. We provide prompt and dependable HVAC Repair services to get your system back up and running efficiently. Our technicians are equipped to diagnose and fix a wide range of issues across all major brands and types of HVAC equipment.
Common problems we address in St. Louis homes and businesses include:
- System not cooling or heating: Often related to refrigerant issues, compressor problems, or faulty heating elements.
- Strange noises: Grinding, squealing, or rattling sounds can indicate issues with motors, belts, or other internal components.
- High energy bills: An inefficient system working too hard can significantly increase utility costs.
- Thermostat problems: Inaccurate readings or communication errors preventing proper system operation.
- Poor airflow: Blocked ducts, dirty filters, or fan issues reducing comfort and efficiency.
- Refrigerant leaks: Leading to insufficient cooling and potential system damage.
- Clogged drain lines: Particularly common in humid St. Louis summers, causing water leaks.
We understand that HVAC problems can arise unexpectedly. Our repair process involves thorough inspection, clear explanation of the issue and proposed solution, and efficient repair using quality parts. We aim to restore your comfort quickly and effectively. For specific issues with your AC, furnace, or other systems, explore our dedicated repair pages like AC Repair, Heat Pump Repair, or Boiler Repair.
Professional HVAC Installation & Replacement in St. Louis
Choosing the right HVAC system is a significant decision for your St. Louis property's long-term comfort and efficiency. Whether you're installing a system in a new construction or replacing an aging unit, our expert team provides professional HVAC Installation and HVAC Replacement services.
Deciding whether to repair or replace can be challenging. While the "$5000 rule" (if the repair cost multiplied by the system's age in years exceeds $5,000, consider replacement) is a general guideline, we provide personalized recommendations based on your system's condition, age, repair history, and your specific comfort and efficiency goals. Frequent breakdowns, declining efficiency, or a system over 15 years old are often indicators that replacement may be the more cost-effective long-term solution.
We specialize in installing a variety of systems suited for the St. Louis climate, including energy-efficient central air conditioners, furnaces, heat pumps, and ductless mini-splits. Our installation process ensures your new system is correctly sized, properly installed, and calibrated for optimal performance and efficiency in your specific home or business. We can discuss options for increasing energy efficiency that may help reduce energy consumption and lower utility bills. To assist with the investment in a new system, we also offer flexible Financing options. For detailed information on installing specific systems, see our pages for AC Installation, Furnace Installation, Heat Pump Installation, or Ductless Installation.
Essential HVAC Maintenance in St. Louis
Regular maintenance is key to ensuring your HVAC system operates reliably and efficiently throughout the year, especially with the temperature extremes St. Louis experiences. Our comprehensive Maintenance Plan is designed to keep your system in peak condition, preventing unexpected breakdowns and extending its lifespan.
A professional HVAC tune-up includes essential tasks like cleaning coils, checking refrigerant levels, inspecting electrical connections, lubricating moving parts, and replacing filters. These steps help catch potential issues early, improve energy efficiency, and maintain healthy indoor air quality.
Benefits of consistent HVAC maintenance in St. Louis include:
- Preventing Breakdowns: Identifying and fixing minor issues before they become major, costly problems.
- Improved Efficiency: A clean, well-tuned system uses less energy to heat or cool your space, saving you money on utility bills.
- Extended System Lifespan: Regular care helps your equipment last longer, delaying the need for premature replacement.
- Enhanced Comfort: Ensures consistent temperatures and proper airflow throughout your property.
- Maintaining Air Quality: Clean filters and coils contribute to healthier indoor air.
Our Maintenance Plan makes it easy to stay on schedule with essential tune-ups, offering benefits like priority service and discounts. Explore our Maintenance Plan details to learn how routine care can protect your investment and ensure continuous comfort.
Types of HVAC Systems We Service in St. Louis
Our expertise covers a wide range of heating and cooling technologies commonly used in St. Louis properties. We provide service for:
- Central Air Conditioners
- Furnaces
- Heat Pumps
- Boilers
- Ductless Mini-Split Systems
- Thermostats and zoning systems
- Indoor Air Quality products
Whatever type of system you have, our technicians have the knowledge and experience to provide the necessary service.
Serving St. Louis and Surrounding Communities
Hely Heating and Air Conditioning is proud to serve homeowners and businesses throughout St. Louis City, St. Louis County, and Jefferson County. Our service area includes numerous communities, ensuring local expertise is always nearby. We regularly provide HVAC services in areas like Fenton, Affton, Arnold, Kirkwood, Webster Groves, and, of course, across St. Louis itself. Visit our Locations page for a full list of areas we serve.
Frequently Asked Questions About HVAC in St. Louis, MO
We understand you may have questions about your HVAC system and our services. Here are answers to some common inquiries from St. Louis residents:
How much does HVAC repair cost in St. Louis?
The cost of HVAC repair varies greatly depending on the specific issue, the type of system, and the parts needed. Minor repairs can be relatively inexpensive, while major component replacements will cost more. We provide an assessment after diagnosing the problem.
What is the $5000 rule for HVAC repair vs. replacement?
The $5000 rule is a guideline suggesting you consider replacing your HVAC system if the estimated cost of the repair multiplied by the age of the system in years exceeds $5,000. For example, if a repair costs $500 and the system is 12 years old (500 x 12 = 6000), it might be more cost-effective to replace it. This rule helps frame the decision but should be considered alongside other factors like the system's overall condition and efficiency.
How much does a new HVAC system cost in St. Louis?
The cost of a new HVAC system installation depends on several factors, including the type and size of the system, the complexity of the installation, and the efficiency rating of the equipment chosen. Higher efficiency units often have a higher upfront cost but can lead to significant energy savings over time.
What are the most common HVAC problems in St. Louis?
In St. Louis, common issues include problems related to temperature and humidity extremes. This often means dealing with AC refrigerant leaks, clogged condensate drains (due to high humidity), airflow issues from dirty filters or ducts, and thermostat malfunctions. In winter, furnace problems like ignition issues or clogged burners are frequent.
How often should I get HVAC maintenance in St. Louis?
Most manufacturers recommend getting professional HVAC maintenance twice a year – typically in the spring before the cooling season and in the fall before the heating season. This ensures both your air conditioner and heating system are prepared for peak demand during St. Louis's hottest and coldest months. Our Maintenance Plan includes two visits annually.
Who should I call if my AC isn't working in St. Louis?
If your AC isn't working, you should call a qualified local HVAC contractor like Hely Heating and Air Conditioning. Our technicians specialize in diagnosing and repairing air conditioning issues to restore comfort quickly.
For any questions about our services or to discuss your specific HVAC needs in St. Louis, we are ready to provide assistance.