Breathe Cleaner Air Inside Your Home

Indoor air quality solutions including air purification, filtration upgrades, and humidity control in Leesburg & The Villages FL

You spend most of your time indoors, but the air inside your Eustis home may contain more allergens, dust, and moisture than the air outside. Pollen drifts through open doors, humidity creeps in during afternoon thunderstorms, and dust accumulates in ductwork over years of use. St. Louis Air Conditioning installs air purification systems, filtration upgrades, and humidity control solutions that address common Florida concerns without requiring you to replace your existing HVAC system.

We provide air purification, filtration upgrades, humidity control, and duct services designed to reduce allergens, moisture buildup, and poor airflow. Our solutions work alongside your existing HVAC system, integrating seamlessly with your air handler and ductwork. These improvements are ideal for households affected by seasonal pollen, dust, and high humidity, supporting cleaner and healthier indoor environments year-round.

Ask about indoor air quality testing and improvement options in Eustis today.

What we install and how it works

When you schedule service in Eustis, we install HEPA filtration systems, UV air purifiers, or whole-home dehumidifiers depending on what your indoor environment needs most. 


After installation, you will notice less dust settling on furniture, fewer allergy symptoms during pollen season, and lower indoor humidity levels that make your home feel cooler without adjusting the thermostat. Your HVAC system may also run more efficiently because clean filters and balanced humidity reduce strain on the compressor and blower motor.


UV air purifiers mount near the evaporator coil and use ultraviolet light to kill mold and bacteria before they circulate through your ductwork. Whole-home dehumidifiers remove excess moisture from the air, preventing mold growth and reducing the sticky feeling common in Florida homes during summer. We also inspect and clean ductwork to remove dust buildup that degrades air quality over time.

Woman in straw hat smiles, holding wine glass near a lake.

Here is what homeowners usually ask

Homeowners in Eustis often ask about filter replacement schedules, whether air purifiers make a noticeable difference, and how to reduce indoor humidity without overcooling their homes.

Checkmark icon in a circle.
How often do I need to replace a HEPA filter?
HEPA filters typically last six to twelve months depending on how much dust and pollen circulate through your home. We recommend checking your filter every three months and replacing it when airflow feels restricted.
Check mark symbol inside a circle.
Will I notice a difference after installing a UV purifier?
You may notice fewer musty odors near air vents and less visible mold around your evaporator coil. UV purifiers work continuously to kill airborne pathogens, so the benefits accumulate over weeks rather than appearing immediately.
Black check mark inside a black circle.
What humidity level should I aim for indoors?
Indoor humidity between forty and fifty percent feels comfortable and prevents mold growth. Whole-home dehumidifiers help you maintain this range even during Florida's humid summer months.
A black check mark inside a circle.
Can you test my indoor air quality before recommending solutions?
Yes, we measure particulate levels, humidity, and airflow at multiple points throughout your Eustis home. Testing helps us recommend the right combination of filtration, purification, and humidity control for your specific needs.
Check mark inside a circle.
Do these systems require regular maintenance?
UV bulbs need replacement every one to two years, HEPA filters require regular changes, and dehumidifiers need periodic cleaning to maintain performance. We include these tasks in our seasonal maintenance visits.

St. Louis Air Conditioning has installed indoor air quality systems in homes throughout Eustis, from older properties with original ductwork to new construction with modern HVAC equipment, so we understand how different homes respond to filtration and humidity control. Get in touch to schedule air quality testing or request an installation estimate in Eustis today.