9 Proven Ways to Slash Summer Cooling Costs in Central Florida

A Central Florida summer is no joke. From May through October, temperatures routinely hit the low-to-mid 90s, humidity makes it feel even hotter, and your air conditioner runs for the better part of every day. For most households in the Eustis area, cooling accounts for 40–50% of total electricity use during summer months.

The strategies below are proven, practical, and scalable: some cost nothing, some involve modest investment, but all of them deliver real savings.

1. Set Your Thermostat to 78°F When Home

The Department of Energy recommends 78°F as the sweet spot for summer comfort and efficiency. For every degree you lower the thermostat below that, you add roughly 3% to your cooling costs. If you’ve been running at 72°F, you could be spending 18% more than necessary.

2. Use Setback Temperatures When Away

Raise the thermostat to 85°F when you leave for work or for extended periods. A smart or programmable thermostat makes this automatic. It’ll cool the house back down before you return. Don’t shut the system off entirely in Florida summer; the house gets too hot and humid to recover quickly, and you risk mold growth.

3. Seal Air Leaks Around Doors and Windows

Conditioned air escaping through gaps around doors, windows, and electrical outlets is essentially money leaking out of your home. Walk the perimeter of your home on a hot day and feel for warm air infiltration. Weatherstripping and caulk are cheap and highly effective fixes.

4. Use Ceiling Fans Strategically

Ceiling fans don’t cool air; they create a wind-chill effect that makes you feel cooler. Used properly, they allow you to raise the thermostat a few degrees without a noticeable difference in comfort. Make sure fans are set to run counterclockwise in summer (when viewed from below). Turn fans off when you leave the room. They cool people, not spaces.

5. Block Solar Heat Gain During the Day

In Central Florida, the sun is a serious adversary. South- and west-facing windows let in enormous amounts of radiant heat during afternoon hours. Cellular shades, blackout curtains, or reflective window film can cut solar heat gain significantly and reduce the load on your AC.

6. Get Your System Professionally Serviced

A clean, well-tuned HVAC system operates 15–25% more efficiently than one running with dirty coils, low refrigerant, or a clogged filter. If you haven’t had a professional tune-up this year, schedule one before peak season. The cost of a maintenance visit is typically recovered in energy savings within a month or two.

7. Change Your Air Filter Monthly

During peak summer operation, your AC circulates an enormous volume of air. Filters clog fast, especially in Central Florida, where pollen, dust, and humidity contribute to faster fouling. A clogged filter forces the blower to work harder, increases energy use, and can damage the system over time.

8. Upgrade to a Variable-Speed or High-Efficiency System

If your air conditioner is more than 10–12 years old, it’s likely running at a SEER rating of 13–14 or lower. Modern systems are rated 18–26+ SEER, which translates directly to lower operating costs. Variable-speed systems are particularly effective in Florida because they run at lower speeds for longer periods, removing more humidity and maintaining more consistent temperatures.

9. Consider a Smart Thermostat

A smart thermostat learns your schedule and preferences, automatically adjusting for away periods and optimizing run times. Models like the Nest or Ecobee can reduce cooling costs by 10–15% annually and pay for themselves within the first year.

Corman & Sons has been helping Central Florida homeowners get maximum efficiency from their HVAC systems since 1995. Whether you need a tune-up, a new system, or advice on the best thermostat for your home, we’re here to help. Give us a call.