Building a Home That Doesn't Cost a Fortune to Cool
Florida electricity bills are no joke. We've had clients move here from the Midwest and nearly fall over when they see their first July Duke Energy bill. The good news is that smart choices during construction can cut your monthly costs dramatically. And most of these upgrades pay for themselves within a few years.
Start with the HVAC System
Your air conditioner is the single biggest energy consumer in a Florida home. It's running most of the year, so this is where efficiency matters most.
- Go with a 16+ SEER2 rated system at minimum. Code requires 15 SEER2, but that extra step up is worth it.
- Variable-speed compressors adjust their output based on demand instead of cycling on and off constantly. They use less energy and do a much better job of controlling humidity.
- Zoned systems let you cool occupied rooms without wasting energy on empty guest bedrooms.
- Make sure the unit is properly sized. An oversized AC cycles too frequently and doesn't dehumidify well. Your house might be cool but it'll feel clammy.
Insulation Makes More Difference Than People Think
Florida code minimums for insulation are just that. Minimums. You can do better.
- Attic insulation: Code is R-38. We recommend R-49 for Central Florida. Heat radiates down through the roof, and that extra insulation makes a noticeable difference in your cooling bill.
- Wall insulation: Blown-in cellulose or spray foam provides better air sealing than standard fiberglass batts. Spray foam is more expensive but it's a significant upgrade.
- Radiant barriers in the attic reflect heat back up instead of letting it radiate down into your living space. They can reduce cooling loads by 5 to 10%.
Windows and Doors
Your windows and doors are where you either keep the heat out or invite it in.
- Low-E glass reduces solar heat gain while still letting in natural light. It's standard on most impact windows.
- Double-pane insulated glass is the norm for new construction. Triple-pane is available if you want maximum efficiency, but the cost-to-benefit ratio gets diminishing.
- Proper installation and sealing around the frames eliminates air leaks. This is about the quality of the install as much as the product itself.
Solar Power
Florida gets roughly 230 sunny days per year. Putting solar panels on your roof makes a lot of financial sense.
- A typical 8 to 12 kW system can offset most or all of your electric bill
- Federal tax credits cover 30% of the installation cost through 2032
- Net metering through FPL and Duke Energy lets you sell excess power back to the grid
- If you're not ready for solar right now, at least have your builder run solar-ready wiring during construction. It costs almost nothing to add during the build and saves thousands later.
Water Heating
Your water heater is the second or third biggest energy consumer in the house, depending on your habits.
- Heat pump water heaters are 2 to 3 times more efficient than standard electric tank heaters. They pull heat from the surrounding air instead of generating it. In Florida's warm climate, they work exceptionally well.
- Tankless water heaters heat water on demand and never run out, but the upfront cost is higher.
- Solar water heaters work great in Florida. The payback period is shorter here than almost anywhere else in the country.
Smart Home Features
- Smart thermostats like Ecobee or Nest learn your schedule and adjust cooling automatically. Simple to install, and the savings add up fast.
- LED lighting throughout uses 75% less energy than incandescent bulbs. This should be standard in every new build.
- Smart irrigation controllers that adjust watering based on weather data reduce water waste and keep your utility bill down.
The Bottom Line on ROI
An energy-efficient home in Central Florida can save you $150 to $300+ per month compared to a home built to bare minimums. Over 10 years, that's $18,000 to $36,000 in savings. Many of the upgrades pay for themselves in 3 to 5 years, and they increase your home's resale value too.
J&N StructureWorks builds energy efficiency into every custom home. We'll walk you through the options and help you figure out where to put your dollars for the biggest return.