How to Maintain Energy Efficiency During Heatwaves

Jul 22, 2025

As the heat becomes oppressive, keeping your home cool can feel like a full-time job. Air conditioners run longer, appliances work harder, and energy bills climb fast. But even during a heatwave, it is possible to stay comfortable without using more electricity than you need. With a few smart steps, you can protect your home from the heat while keeping energy use in check.

Start with Smart Thermostat Settings

During a heatwave, your thermostat plays a key role in how much energy your home uses. A good rule is to set it a little higher than usual, around 78 degrees when you are home and even higher when you are away. Each degree can make a difference in how long your system has to run.

If you have a programmable or smart thermostat, set a schedule that follows your daily routine. Allow the home to warm up during the day when no one is around, and cool it down again just before people return.

Block Heat at the Source

One of the best ways to keep your home cool is to stop heat from getting in. Close curtains or blinds during the day, especially in rooms that get direct sunlight. Thermal or blackout curtains can reduce heat gain and take pressure off your cooling system.

You can also apply reflective film to sun-facing windows. It is a small investment that helps reflect heat and reduce the load on your air conditioner.

Avoid Adding Indoor Heat

Appliances like ovens, stovetops, and dryers add extra heat to your home. During a heatwave, try to cook outdoors or use small appliances like a microwave, air fryer, or slow cooker. Delay laundry and dishwashing until the evening when temperatures are lower.

Turning off lights and unplugging electronics when not in use can also help. Even small devices produce heat that adds up over the course of the day.

Use Fans to Improve Airflow

Fans do not cool the air, but they do help your body feel cooler. Use ceiling fans in occupied rooms and set them to spin counterclockwise. This pushes air downward and creates a wind-chill effect that helps you stay comfortable.

Place box fans near open windows during the early morning or evening to bring in cooler air, then close the windows and curtains once the temperature begins to rise again.

Check Your Air Conditioning System

If your cooling system is working harder than usual, it needs to be in top shape. Replace or clean the air filter every month during heavy use. Make sure vents are not blocked by furniture or rugs, and clear debris from the outdoor unit.

A professional checkup once a year helps your system run more efficiently, but small maintenance tasks like cleaning and filter replacement can make a big difference on their own.

Keep Comfort and Costs in Balance

During a heatwave, it is easy to rely on your air conditioner more than usual. But by taking a few simple steps, such as sealing out heat, managing thermostat settings, and using fans the right way, you can stay comfortable without letting your energy use get out of hand. These habits are not just useful during extreme weather. They can help build a more efficient home all summer long.

Recent Posts

How Smart Sensors Can Prevent Energy Waste

Smart sensors help prevent energy waste by responding to real activity in your home. From lighting control to heating and cooling adjustments, these tools reduce unnecessary energy use while supporting comfort and consistency throughout the day.

read more

Budgeting for Energy Efficiency: Where to Start

Budgeting for energy efficiency does not have to feel complicated. With a clear plan that includes low cost steps, long term upgrades, and available incentives, you can start improving comfort and lowering energy use in a way that fits your finances. Let this guide help you map out your next steps.

read more