If your home or business is experiencing heating, cooling, or air quality issues, you deserve a team that solves problems correctly the first time. At Expert Mechanical Services, we bring over 30 years of hands-on industry experience in HVAC, mechanical services, refrigeration, indoor air quality, and energy-saving maintenance.
Located in Fenton, Missouri, we proudly serve St. Louis, Jefferson County, Franklin County, and St. Charles County with high-quality workmanship, precision diagnostics, and service you can trust.
We are problem solvers, committed to doing the job right with exceptional attention to detail, honest communication, and reliable long-term results.
Your Trusted Local Partner for Heating, Cooling, Refrigeration, and IAQ Services
We understand that choosing an HVAC or mechanical contractor is a major decision. You are placing your comfort, safety, and property in someone else’s hands. That is why our team approaches every job with professionalism, care, and a dedication to solving complex comfort challenges for both residential and commercial clients.
We specialize in:
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Residential & commercial HVAC repair, installation, and replacement
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Indoor air quality services including air filtration, purification, and humidity control
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Custom ductwork fabrication and installation
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Industrial refrigeration repair and cold-storage systems
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Emergency service and accurate HVAC troubleshooting
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Energy-saving preventative maintenance for all systems
Heating & Cooling Services Designed for Long-Term Comfort
Your comfort system should be dependable in every season. Our team ensures your air conditioner, furnace, heat pump, boiler, or packaged unit performs at peak efficiency and delivers maximum value.
Heating Services
We provide expert solutions for gas furnaces, boilers, radiant heating, and hybrid systems. If your furnace will not kick on, you have a single stage furnace issue, or you need professional furnace repair in St. Louis, we diagnose the problem with precision and restore your heat quickly.
We also offer furnace safety inspections, residential boiler maintenance, and solutions for uneven heating and energy loss.
Cooling Services
When your AC is not cooling, blowing warm air, or struggling to keep up, we find the root cause fast. Common calls include:
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Air conditioner stopped cooling
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AC will not cool on hot days
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Central air system running but not cooling
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Air conditioner troubleshooting for airflow or refrigerant issues
We install high-efficiency cooling systems that reduce monthly energy costs, improve comfort, and last for years.
Indoor Air Quality & Humidity Control Services
A comfortable home or business requires clean, healthy air. Our IAQ services help solve issues like dust, allergens, humidity imbalance, odors, and mold growth.
We provide:
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Whole-home air filtration systems
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Air purification & UV sanitation
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Commercial dehumidification systems
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Humidifiers & dehumidifiers
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Ventilation improvements
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Solutions for asthma and allergy relief
If you want cleaner, fresher, healthier air at home or in your business, our team can help.
Whether your central air unit is not cooling, your furnace will not light, or your AC stopped cooling, we provide clear answers and fast resolutions.
Commercial Mechanical Services for Missouri Businesses
Expert Mechanical Services provides advanced commercial solutions that keep your operation running safely and efficiently.
We serve offices, retail spaces, restaurants, warehouses, manufacturing facilities, healthcare centers, churches, and more.
Our commercial specialties include:
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Commercial HVAC design, installation, and repair
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Mechanical systems maintenance
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Rooftop units & packaged systems
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Commercial heating and air conditioning repair
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Installation, maintenance, and repair of boilers and chillers
If you are searching for HVAC commercial contractors in St. Louis or mechanical contractors in Jefferson County, our team provides fast response times and accurate problem resolution.
Custom Ductwork Fabrication & Installation
We design and install custom ductwork that is built for proper airflow, efficiency, and long-term performance. If your system struggles with airflow, hot and cold spots, dust problems, or efficiency issues, custom ductwork may be the solution.
We serve both residential and commercial properties, offering precise fabrication and clean installation.
Why Choose Expert Mechanical Services?
Choosing the right HVAC or mechanical partner matters. Here is what sets us apart:
We Are True Problem Solvers
We do not guess. We diagnose accurately and provide honest recommendations that fit your home or business.
High-Quality Workmanship
Our installs and repairs are built to last. We follow industry best practices and prioritize safety and efficiency on every job.
Respect for Your Property
Our technicians protect your home, clean up thoroughly, and communicate clearly throughout the process.
Fair, Accurate Solutions
We do not believe in upselling or pressure tactics. We present the best solution for your comfort and budget.
Energy-Saving Maintenance Plans
Preventative maintenance extends equipment life, improves efficiency, and reduces breakdowns. We provide residential and commercial plans designed to save money and prevent major issues.
If you are searching for energy saving tips for winter, or want your system to run more efficiently year-round, our maintenance plans make a measurable difference.
Proudly Serving St. Louis, Jefferson County, Franklin County, and St. Charles County
Whether you need furnace repair in St. Louis, a commercial HVAC contractor in Jefferson County, custom ductwork in Franklin County, or refrigeration repair in St. Charles County, our team is ready to help.
Schedule Your Service with Expert Mechanical Services
If you need fast repairs, a free replacement estimate, improved indoor air quality, or commercial mechanical support, we are here to help.
Contact Expert Mechanical Services today to get the high-quality, reliable results you deserve.