Best Thermostat Settings for Florida Humidity (And Why 'Fan ON' Makes Your House Muggy)
Should your AC fan stay on Auto or On in Florida? Learn the ideal summer thermostat settings and why the 'Fan On' switch spikes indoor humidity.
Why 'Fan ON' raises indoor humidity in Tampa Bay
When your air conditioner finishes a cooling cycle, the indoor evaporator coil is still coated in cold condensation that hasn't finished dripping into the drain pan. If your thermostat fan is set to On, the blower keeps pushing warm room air across that wet coil—re-evaporating that moisture right back into your bedrooms.
Switching the fan to Auto lets the water drain completely down the condensate line between cycles, immediately lowering indoor relative humidity.
Recommended Tampa Bay thermostat targets
For most Tampa Bay homes, keeping the thermostat between 74°F and 77°F while occupied—and avoiding huge 10-degree setbacks when away—keeps indoor humidity in the healthy 45% to 55% range. Turning the AC completely off during a weekend trip lets Florida moisture soak into drywall, wood floors, and upholstery.
If your home still feels sticky with the fan on Auto, read our guide on why a house feels humid at 72° or explore a dedicated whole-home dehumidifier.
Smart humidity control across Tampa Bay
Cool Breeze Tampa Bay installs humidity-sensing thermostats and whole-home dehumidifiers in St. Petersburg, Tampa, Brandon, and Sarasota.
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