Expert HVAC Services Tailored for Clayton, MO Homes & Businesses
Comfort and reliable climate control are essential for properties in Clayton, MO, a community known for its blend of historic homes and modern developments. Each property presents unique challenges and requirements for heating, ventilation, and air conditioning systems. At Hely Heating and Air Conditioning, we understand the specific needs of the Clayton area, bringing decades of experience to ensure your indoor environment remains comfortable and healthy year-round.
Since 1969, Hely Heating and Air Conditioning has been a trusted partner for families and businesses throughout St. Louis and Jefferson Counties, including the Clayton community. Our long history is built on a foundation of quality workmanship, integrity, and a deep commitment to customer satisfaction. We specialize in delivering tailored HVAC solutions, whether you reside in one of Clayton's charming older homes with unique heating systems or a contemporary property requiring the latest in cooling technology.
We offer a comprehensive suite of HVAC services designed to address every aspect of your heating and cooling needs. From urgent repairs that restore comfort quickly to complex installations and proactive maintenance that extends system lifespan, our team is equipped and ready to provide the expert service you expect.

Why Choose Hely Heating and Air Conditioning in Clayton?
Selecting an HVAC provider is an important decision. For Clayton residents and business owners, choosing Hely means partnering with a company that not only has extensive experience but also understands the local climate and housing stock.
Our team is composed of highly experienced technicians, many of whom have been with us for over 15 years. This level of tenure translates directly into expertise and efficiency on every job. They are familiar with the diverse range of heating and cooling systems found in Clayton, from vintage Boilers in older properties to modern central Air Conditioning and Ductless systems in newer constructions and additions. Their knowledge allows for accurate diagnosis, precise installations, and effective repairs, often anticipating issues specific to certain types of systems or property layouts common in the area.
Beyond technical skill, we pride ourselves on reliability and responsiveness. We offer 24/7 emergency HVAC service because we know that heating and cooling problems don't adhere to a schedule. When your system fails, especially during extreme St. Louis weather, you need prompt and professional help. Our team is ready to respond, minimizing discomfort and preventing potential damage to your property.
Our commitment to quality is reinforced by our partnerships with leading manufacturers like Goodman and Daikin, offering access to reliable, energy-efficient equipment backed by robust warranties. This commitment ensures that whether we are repairing an existing unit or installing a new system, you receive solutions that are built to last and perform optimally.

Comprehensive HVAC Repair in Clayton
When your heating or cooling system malfunctions, it can disrupt your comfort and daily life. Our HVAC repair services in Clayton are designed to quickly diagnose and resolve problems, restoring your system's function and your peace of mind. Our technicians are skilled in troubleshooting issues across all makes and models of furnaces, air conditioners, heat pumps, and other HVAC equipment.
Common HVAC problems we address in the St. Louis area, including Clayton, include issues like clogged condensate drains, which can lead to leaks; low refrigerant levels affecting cooling efficiency; duct leaks that waste energy; dirty air filters restricting airflow; thermostat malfunctions causing inconsistent temperatures; motor problems in fans or compressors; moisture buildup leading to mold or system failure; and unusual smells or sounds indicating underlying mechanical issues.
Our repair process begins with a thorough inspection and diagnostic assessment. Using advanced tools and their extensive experience, our technicians pinpoint the root cause of the problem, not just the symptoms. We then provide a clear explanation of the issue and recommend the necessary repairs. We strive to perform repairs efficiently and effectively, often completing work on the first visit thanks to our well-stocked service vehicles. For unexpected breakdowns, our 24/7 availability ensures that help is just a call away, day or night.
Expert HVAC Installation & Replacement in Clayton
Whether you're building a new home, undertaking a major renovation, or your existing system has reached the end of its lifespan, our HVAC installation and HVAC replacement services in Clayton provide reliable, energy-efficient solutions. Choosing the right system for your property is crucial, especially considering the unique characteristics of Clayton homes.
For homeowners in older Clayton properties, we understand the complexities of working with existing infrastructure, including ductwork or historic features. We can recommend and install systems suitable for these challenges, such as high-velocity systems, space-saving mini-splits, or traditional forced-air systems integrated with care. For properties with hot water radiators, our expertise extends to Boiler installation and replacement, ensuring your heating needs are met with reliable, efficient equipment.
Our installation process is meticulous. It starts with a detailed consultation and site assessment to determine the ideal system size and type for your specific needs and property layout. Proper sizing is paramount for efficiency and comfort – a system that's too large or too small will not operate effectively. We guide you through the selection process, considering factors like energy efficiency ratings (SEER, AFUE), fuel type, system features, and budget.
Our certified technicians handle the installation with precision and professionalism. They ensure all components are correctly connected, sealed, and calibrated according to manufacturer specifications and local codes. We take care to protect your property during the installation and leave the work area clean and tidy. After installation, we test the system thoroughly to ensure optimal performance and explain how to operate your new equipment effectively. Investing in a new, high-efficiency system can lead to significant energy savings, improved comfort, and enhanced indoor air quality over the long term. We also offer Financing options to help make the investment more manageable.
Proactive HVAC Maintenance in Clayton
Regular maintenance is key to extending the lifespan of your HVAC system, maintaining its efficiency, and preventing unexpected breakdowns. Our HVAC maintenance services in Clayton are designed to keep your heating and cooling equipment running smoothly season after season. Just like a car, your HVAC system has moving parts and filters that require routine attention to perform at their best.
During a maintenance visit, our technicians perform a comprehensive check and cleaning of your system. This includes inspecting electrical connections, lubricating moving parts, checking refrigerant levels, cleaning coils, checking thermostat calibration, and ensuring safety components are functioning correctly. For heating systems, we clean burners and heat exchangers; for cooling systems, we clear condensate drains and check airflow. These tune-ups catch potential issues early, preventing them from escalating into costly repairs.
Regular maintenance not only helps prevent breakdowns but also ensures your system operates at peak efficiency, which can lower your energy bills. It also contributes to healthier Indoor Air Quality by ensuring filters are clean and components are free of dirt and debris.
To make maintenance easy and cost-effective, we offer a Maintenance Plan. This plan typically includes scheduled tune-ups for both your heating and cooling systems annually, providing peace of mind and priority service.
HVAC Systems We Service
Our team in Clayton is proficient in servicing a wide array of HVAC systems, including:
- Air Conditioning Systems
- Heating Systems (including Furnaces)
- Boilers (Expertise with systems found in older and historic Clayton homes)
- Heat Pumps
- Ductless Mini-Splits (Ideal for targeted comfort in specific rooms or additions where ductwork is challenging)
- Thermostats and Advanced Controls
Ensuring Year-Round Comfort
Beyond temperature control, indoor air quality plays a crucial role in your home's comfort and health. We offer services and solutions to improve your Indoor Air Quality in Clayton, addressing issues like humidity imbalances, airborne pollutants, and ventilation problems. From installing whole-house air purifiers that capture allergens and contaminants to humidifiers and dehumidifiers that maintain optimal moisture levels, we can help you create a healthier and more comfortable indoor environment.
What to Expect When You Choose Hely Heating and Air Conditioning
When you contact Hely for HVAC service in Clayton, you can expect a straightforward and professional experience from start to finish. Our process is designed to be transparent and respectful of your time and property.
First, our friendly office staff will schedule your appointment at a convenient time. For service calls, our technician will arrive promptly, equipped to diagnose most common issues. They will conduct a thorough inspection and clearly explain their findings and recommended solutions before beginning any work. We believe in informed decisions and will answer any questions you have.
For installations or replacements, we begin with a detailed consultation to assess your needs and recommend the best system options. We provide a clear proposal outlining the scope of work and cost. On installation day, our crew will arrive on time, protect your home during the process, perform the installation according to the highest standards, and clean up thoroughly afterward. They will then walk you through the operation of your new system.
Throughout any service, our technicians prioritize professionalism, cleanliness, and minimal disruption to your home or business. Our goal is to provide efficient, high-quality service that resolves your HVAC needs effectively.
Our History and Commitment
Founded by Richard Hely in 1987, following 17 years in the industry, Hely Heating and Air Conditioning was built on principles of quality and integrity. Richard initially handled every service and installation himself, setting a high standard that continues to guide our operations today. Richard remains involved in the business, ensuring that customer satisfaction remains the top priority. This family-owned approach, combined with our long-serving, experienced team, means you receive service from dedicated professionals who are invested in your comfort and the company's reputation. We are proud of our history and the trust we've built with communities like Clayton over the decades.