Fenton, MO · HVAC

HVAC Contractor in Fenton

Fenton homes and businesses come with a variety of heating, cooling and ventilation systems. Some homes like those in Kingston Hills on the Bluffs have newer systems built for today's houses. Other homes still rely on original ductwork and decades-old thermostats. When you need HVAC services, you need an HVAC company that knows how to handle your particular system.

(314) 527-2722 Book a Service

Rooftop HVAC condenser unit and ductwork serviced by Patriot in Fenton, MO

The techs at Patriot Heating, Cooling and Air Quality techs have experience working on all types of HVAC systems (opens in a new tab). They also know how to explain what's going on with your system in easy-to-understand language.

Co-owner Craig Denton uses his 35 years of expertise to train every tech in-house before sending them to your home or business. You get background-checked licensed techs who care for your space and provide transparent pricing before any HVAC service begins.

This page covers our HVAC maintenance services, heat pumps, ductless mini-splits, ducts, and thermostats. Start with the section that fits your problem. Then click through for the details.

HVAC Maintenance Keeps Systems Running Year-Round

Maintenance is a checkup before something breaks on any part of your heating, cooling or ventilation system. Because it's so essential, we offer a maintenance plan to help you save money and avoid issues later.

The weather in Fenton gets hot and muggy starting in May, when the average humidity is 78 percent. The last thing you want is to call for air conditioner repair near Fenton. Our preventive maintenance covers a full system inspection. In spring, you'll get refrigerant levels checked and fall includes furnace or boiler components. With our maintenance plan, you also get a water heater check and discounts.

Find out how our HVAC Maintenance plan saves you money with discounts and prevention.

Heat Pump Repair Restores Heating and Cooling

Heat pumps heat your home during winter and cool it in the summer. St. Louis weather swings hard. Humid summers and cold damp winters keep your heat pump working in both directions all year. Humidity in Fenton rarely falls below 50 percent and can rise to as much as 84 percent. That steady workload can expose worn parts.

Heat pump repair keeps your current heat pump running.

Heat Pump Installation Adds Efficient Comfort

When it's time to replace an old furnace and AC combo and you want the efficiency of a geothermal system, we can help with heat pump installation.

Interest in electric heat pumps has grown across the St. Louis region as homeowners with aging systems weigh replacement choices. Fenton is part of that shift. Find out if a new heat pump makes sense for your home.

Not sure what your HVAC contractor project needs? Ask us.

Ductless Heating & AC Services

Your ductless mini-split unit requires tune-ups just as a central HVAC unit does. Our ductless heating and AC services help it run efficiently to prevent breakdowns and also repair issues when they arise. Read more about our process and what the services involve.

Ductless Heating & AC Installation

A ductless mini-split has a wall-mounted indoor unit connected to an outdoor compressor. No ducts needed. It's ideal for older Fenton homes getting room additions, where the existing ductwork is insufficient to heat or cool the room.

Ductless heating & AC installation can also be a great option for garages and sunrooms or when central AC replacement requires retrofitted ductwork.

HVAC Duct & Vent Repair

Many older Fenton homes and businesses still use original ductwork that can slowly degrade with seams leaking, sections coming loose behind walls and insulation breaking down. This degradation tends to get noticed only when you start hearing noises or feeling weak air flowing from vents.

During an HVAC Duct & Vent Repair visit, we evaluate your system looking for issues. Then we repair the affected area so air reaches your room again without changing the rest of your HVAC system. But this remains repair work on your existing ducts. It is not new construction.

HVAC Duct & Vent Installation

When you are finishing a basement, adding a room or retrofitting ductwork, you are likely considering HVAC duct and vent installation.

New ductwork must have proper sizing and routing customized to your system and home. It might require a new layout when a finished space was not part of the original build, even in newer construction like those in Alexander Pointe.

Need help with deciding if this is the service you need?

Thermostat Repair

When your thermostat is giving you issues that a battery change won't fix, you probably need thermostat repair service. The most common issues are blank screens, a temperature reading that doesn't match how your room feels. The goal of a repair is to return it to normal functioning.

Thermostat Installation

When your current thermostat is faulty or you just want more controls and options for your HVAC system, you're looking at a new thermostat installation. Newer models offer remote access and scheduling, and even smart home integration. But setup matters. We wire your new thermostat (opens in a new tab) and set up its schedule or app controls then show you how to use it.

Whole Home Air Purifier

Many homeowners focus on temperature but forget about the air they breathe. Dust, allergens, and pet dander circulate through your system all year long and the humidity in Fenton just makes it worse. Whole house air purifiers sanitize the air and catch particles before they settle in your rooms. When you change your HVAC filters regularly and still notice dust build up, that's when you want to consider a whole home air purifier. Find out what this indoor air quality system can do for your home or business.

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Good to Know

Frequently Asked Questions

Common questions about HVAC contractor

Yes, we service HVAC systems all over Fenton, from newer homes near Gravois Bluffs to older houses with original ductwork. We know Fenton's housing mix isn't one-size-fits-all. Our technicians check your specific setup before recommending anything. That way you get a fix that matches your home, not a generic answer.

Call repair when something already broke, like your AC stops cooling or your furnace quits blowing warm air. Call maintenance before problems start, as a checkup that catches worn parts early. Repair fixes what failed. Maintenance helps you avoid that failure in the first place, especially through Fenton's humid summers.

If one part failed and everything else was working fine last week, standard HVAC repair usually solves it. If you notice several issues together, like uneven rooms, strange noises, and rising energy bills, that points to a system-wide problem. HVAC system repair starts with a full diagnostic instead of guessing at one part.

Fenton's humidity runs high, averaging 78% in May, and that moisture wears down AC coils and drain lines. Systems also run nonstop for months during hot, muggy stretches. That steady workload is why parts fail more often here and why regular maintenance matters before summer hits full force.

Repair usually makes sense first if your heat pump still has useful life left but can't switch modes or keep up with demand. A technician checks the reversing valve, refrigerant charge, and outdoor unit to find the cause. If the equipment itself is aging out, replacement becomes the better long-term option.

What Our Customers Say

Real reviews from homeowners across Fenton and the St. Louis metro.

"An outstanding experience! They scheduled a visit and arrived promptly the very next day. The technician was incredibly friendly and knowledgeable, took the time to answer all my questions, and offered valuable suggestions for improving my heating and A/C system. Their professionalism earned my trust — highly recommend!"

Ronnie K. via Google

"I had the opportunity to speak with the company and got some great advice on my HVAC situation. Great experience — a lot of knowledge with this company. I would recommend them for all your needs."

Terry S. via Google