What happens during a ductless installation visit?

The visit starts with a load assessment of the room, not just a sales pitch. We measure square footage, ceiling height, window exposure, and insulation quality. This tells us the right unit size for your space. Older ranch homes near Gravois Road often need different sizing than newer construction off Highway 141. After the assessment, we walk you through single-zone or multi-zone options based on what your home needs.

Why does one room in my Fenton house stay hot or cold no matter what?

This usually means your ductwork was never sized for that space. Bonus rooms over garages, finished basements, and sunroom additions often get tacked onto an existing duct run. That run loses air pressure before it reaches the new space. We see this often in additions built onto older Fenton homes near the Meramec River. A ductless unit skips the ducts and heats or cools that room on its own.

Can ductless heating and AC fix a converted attic or finished basement?

Yes, ductless works well for spaces like these that never got proper ductwork. It also helps sunrooms, home offices, and upstairs bedrooms that run hot in summer. If adding a supply vent would mean opening finished walls or ceilings, ductless is often the simpler fix. It's not the right call if your whole house runs evenly and only drafts or insulation are the problem.

Should I repair or replace my ductless unit?

In most cases, repair is the smarter first move, especially if the unit is under ten years old. Water leaks, icing, and breaker trips usually point to fixable issues like a clogged drain line or a bad capacitor. Replacement makes more sense once a unit passes ten years or the repair cost climbs close to half of a new install. We'll give you a straight answer either way.

Ductless Heating & AC Installation in Fenton | Patriot Heating, Cooling and Air Quality

Have you decided to replace your central HVAC system with the versatility of a ductless system? Are you exploring options for rooms that need additional heating or cooling? Our team of licensed technicians can help with ductless heating and AC installation.

Ductless mini-split indoor unit installed by Patriot in a Fenton, MO home

What is Ductless Mini-split AC and Heating?

Ductless mini-split is a heating and cooling system that doesn't require ductwork. It's called a mini-split because it has a single outdoor unit that connects to one or more indoor units, called indoor blowers. Each room has an independent indoor unit mounted on a wall with a thermostat and blower wheel that heats and cools the room.

When You Need Ductless Mini-Split Installation

It might be a matter of choice that you have decided on a mini-split for your whole home. Or perhaps you have a garage that needs heating and cooling. Or maybe you have an addition with vents that doesn't heat and cool properly because the ducts were sized for the house's original footprint.

Whatever the case, our HVAC contractor techs can handle mini-split installs in older ranch homes near Old Gravois Road and new construction like Winding Meadows and everything in between.

Here are some of the reasons you might consider a mini-split

Installing a new AC system and you want the most energy efficient system you can get
Sunroom or three-season room additions
Finished basements with no supply vents
Converted attics and bonus rooms
A garage that is a workspace not just a place for cars
Upstairs bedrooms that run hot in summer and cold in winter
Time to replace an old central unit and you don't want pay for the required retrofit of existing ductwork
You want more temperature control for each room

Not sure if ductless is the best fit? Call for a recommendation.

Signs Your Mini-Split Needs Repair, Not Replacement

Fenton winters and humid summers put real stress on mini-split systems. Knowing what to watch for can save you an emergency replacement. In many cases you can avoid replacing the unit at all. Catching problems early can add years to equipment that still has useful life left.

Water leaking from the indoor unit or pooling near the unit. This points to a clogged condensate drain line or cracked drain pan instead of a failed compressor.
Visible ice buildup on the outdoor coil during winter operation. Common causes include low refrigerant or a failing defrost sensor. Restricted airflow can also cause it.
Short-cycling. The unit turns on and off within a few minutes. This strains the compressor. The cause is often a dirty filter or refrigerant issue. A bad thermostat sensor may also be responsible.
A breaker that trips each time the unit starts. This signals an electrical fault such as a failing capacitor. The compressor may also be drawing too much current.
No heat output during a hard freeze or cold snap. A refrigerant charge problem may be responsible. Other possible causes include a failed reversing valve or control board issue. It does not mean the whole system is done.

Most of these problems can be repaired in the Fenton homes and small commercial spaces we service. Replacement becomes the smarter financial move in a few cases. The unit may be well past ten years old or have a failing compressor. A repair may also cost over half the price of a new installation.

Common Misconception

Many owners assume ductless (opens in a new tab) systems need no maintenance after installation. But filters need cleaning every one to two months. Indoor coils also benefit from annual professional cleaning. Skipping this work causes many of the repairs we do.

Since we handle installations and repair work, we can give you a straight answer about your unit. You may need a service call instead of a replacement quote. We will not push you toward a sale you do not need. Get your mini-split checked if it leaks or ices over. The same applies if it trips breakers or blows cold air when you need heat. A prompt repair can prevent compressor failure.

Ductless Installation Process

Line set routed between indoor and outdoor units during a ductless installation

Proper installation is just as important as the system itself. Here's what you can expect when you schedule your ductless AC installation in Fenton:

Consultation. We begin with a free estimate. During your on-site consultation, our technicians measure your space and assess insulation values and document window exposure in each room.
Electrical panel Check. Many older St. Louis County homes have panels that are near capacity and may have little room for a new circuit. Checking the available amperage and breaker space upfront helps prevent surprise costs during the project.
System Design. We design a ductless solution for your space or spaces including setting a route for lines along a short path between the indoor and outdoor units.
Permits. We file permits with the city or county depending on your address.
Installation. We install all the equipment following all manufacturer specifications to protect your warranty.
System Testing and Calibration. After the installation, we test refrigerant pressures, compressor cycling, blower functionality, and communication between units. We verify correct amperage draw, fine-tune airflow settings, and set programmable features to match your comfort preferences.
Clean-Up and Customer Walkthrough. We respect your space and make sure we clean it up. Then we walk you through the work we did and show you how to use the system and maintain it.
City or county Inspection. Based on your address we will have your city or county inspect the project and sign off on it.

Ductless AC & Heating Installation Pricing

Pricing a ductless system requires calculation of the following variables:

Number of zones. More indoor units require more equipment and installation labor. They may also require a larger outdoor condenser.
Line-length. The distance between the outdoor unit and each indoor unit affects refrigerant line and wiring costs. This can matter more in multi-story homes.
Electrical upgrades. Older Fenton homes may need panel or circuit updates to support new equipment safely.
Mounting location and structural access. Attic and wall installations differ in labor needs. Ceiling cassette installations may also take more work.

This approach keeps pricing transparent. A tech walks through your home and itemizes the zones and equipment required. They also list any electrical work needed. That way you can see what you are paying for before you commit.

Why Homeowners Choose Us

Each tech trains in our training facility in Fenton under the mentorship of a 35 year industry veteran so your home isn't used as a training opportunity.
Every employee passes a background check and drug screening.
Every team member cares about your home and respects you.
We can typically get to your repair within 24 hours and offer weekend repairs.
You receive a free second opinion on installation quotes.

Call Now: (314) 527-2722 to schedule your free ductless installation estimate.

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