Homeowners can save as much as 20 percent in energy costs by adopting a few quick and easy practices, a Purdue University professor says.
One of the top ways to save energy is to make sure air-conditioning equipment is well-maintained, says William Hutzel, an associate professor of mechanical engineering technology.
"In many cases the air conditioner will work and generate cooling, but it may not be operating close to premium," he says. "So you could pay 20 percent more than you need to if it's not maintained."
Maintenance does not necessarily require a trained technician; it can be as simple as clearing dirt, debris or blockages off the outdoor unit.
Another way to cut back on energy use – in summer or winter – is to make sure that the house is airtight. Any air leaking in will make the air conditioner or heater work that much harder to maintain a constant temperature.
For especially hot days, shading also can be quite effective Hutzel says.
"Since air conditioning became popular, we've gotten away from homes with any external shading. When you see an older home, a lot of times it will have awnings on it," he says. "Those awnings are actually very helpful to keep the sun off the windows – one of the easiest places to absorb heat. If nothing else, drawing blinds on a real hot day can have a positive impact."
In terms of electrical loads, it's important to remember that small plug-in devices like cell phone chargers are drawing power even when they're not operating or charging something.
"One doesn't draw a tremendous amount, but a typical home – believe it or not – may have as many as 20 devices. That adds up," Hutzel says. "What experts are recommending these days is unplugging that device or having a shut off that shuts off multiple devices; only use those devices when needed."
When in use, such devices not only draw power, but they also produce heat that forces an air-conditioner to work that much harder, he says.
Hutzel also recommends keeping the thermostat set at a slightly warmer temperature. Those who want keep to their house at 70 degrees in the summer will pay a premium. Instead, Hutzel recommends setting the thermostat at around 74 degrees to help save money.