Indoor Air Quality in Orlando — Fix the Air, Not Just the Temperature

Why does my house feel sticky and smell musty even with the AC on?

Because temperature and humidity are separate problems. An AC can hit 74°F while leaving humidity at 65% — and 60%+ is where mold and dust mites take over.

The usual culprits, in the order we find them: an oversized AC that satisfies the thermostat before it dehumidifies (see why sizing matters), return-duct leaks pulling humid attic air into the system (see ductwork services), and a dirty evaporator coil that can't condense moisture. We measure your actual humidity, inspect the coil on camera, and tell you which problem you have — sometimes the fix is a $150 coil cleaning, not a $1,500 gadget.

Do UV lights actually work, or are they an upsell?

They work — for one specific job: keeping the coil and drain pan free of mold. They are not the whole-house air sterilizer some companies pitch.

Your evaporator coil is dark, wet, and 55°F all year — a mold incubator sitting in the middle of your airflow. A UV lamp mounted to shine directly on the coil keeps growth from establishing, which protects airflow, efficiency, the drain line, and the smell of every cubic foot of air that passes through. What UV won't do is meaningfully sterilize air moving past it at 400+ feet per minute. We install UV where the physics works and say no when it doesn't.

What filtration actually helps with Florida allergies?

A 4–5 inch media cabinet at MERV 11–13 — real fine-particle capture without choking your blower. High-MERV 1-inch filters often do more harm than good.

Standard 1-inch filters exist to protect the equipment, not your lungs. Upgrading them to MERV 13 in the same 1-inch slot piles pressure on the blower and can freeze the coil. The right architecture is a media cabinet: five inches of pleated surface area that captures pollen, mold spores, and fine dust at low resistance, changed once or twice a year instead of monthly. Here's how the options compare:

Deep dive on the moisture side: Florida humidity and mold.

What order should I fix things in?

Humidity first, filtration second, purification last. A purifier in a 65%-humidity house is a bandage on the wrong wound.

1. Get humidity under 60%. Fix oversizing, duct leaks, or coil issues — or add dehumidification if the AC alone can't do it.
2. Stop the sources. UV at the coil, sealed ducts, clean drain pan — so your system isn't manufacturing the problem.
3. Filter what remains. Media cabinet at MERV 11–13 for pollen and spores.
4. Then consider purification — only if symptoms persist after 1–3, which is rare.

This ordering is also the cheapest path, which is why companies that sell air quality by the gadget never present it this way. Regular maintenance keeps steps 1–2 working, and if the system itself is misbehaving, start with a repair visit. We serve Winter Park, Lake Nona, and all 20 areas.

Air quality questions, answered