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Save energy during Michigan’s hot summers

Save energy during Michigan’s hot summers

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When it’s summer in Michigan, the next heat wave is always just around the corner.

If you’re running an air conditioner to cool off — and now you’re preparing for the electric bill — here are a few tips to keep the cold air circulating and maybe save a little money before the next heat wave:

According to the U.S. Department of Energy, three-quarters of all homes in the country have air conditioning. Air conditioning uses about 6% of the electricity produced in the U.S. and costs homeowners about $29 billion annually, so these tips could help many of us.

“Even on sweltering summer days, there are steps people can take to stay on top of their bills and stay safe and comfortable,” said Lauren Snyder, vice president of customer experience at Consumers Energy, in a recent press release. “We want to make sure our customers know they can reduce the strain on their air conditioning systems by taking simple steps that add up to savings.”

Clean and replace filters

The Department of Energy recommends that regular replacement or cleaning of the filters is the most important maintenance to ensure the efficiency of the unit. It is recommended that you clean or replace the filter every one to two months during the cooling season. However, if the unit is in constant use, is exposed to dusty conditions, or if you have pets with fur in the house, the filters may need more attention.

“Clogged, dirty filters reduce airflow and significantly reduce the efficiency of a system. In addition, when airflow is obstructed, air can bypass the filter and deposit dirt directly into the evaporator coil, reducing the coil’s ability to absorb heat,” the agency’s website states. “Replacing a dirty, clogged filter with a clean one can reduce your air conditioning system’s energy consumption by 5 to 15 percent.”

In central air conditioning systems, the filters are generally located along the return air duct, usually mounted in walls, ceilings or in the unit itself. Room air conditioners have a filter in the grille that faces the room, according to the Department of Energy.

Check and clean evaporator coil

The agency also recommends checking the evaporator coil annually and cleaning it when necessary. Outdoor condenser coils can get dirty (from everything from dryer vents to falling leaves to lawn mowers). Dirt is visible on the fins. It says fins on evaporator and condenser coils can become bent, blocking airflow through the coil. A tool called a “fin comb” can return the fins to their near-original condition, according to the agency.

More tips on air conditioning

Here are some additional tips that may be helpful:

  • DTE Energy recommends that residents ensure there is at least 2 feet of clearance around the unit for air circulation. Installing a clean machine can increase efficiency by 5-15%.
  • The energy supplier recommends protecting central air conditioning systems from direct sunlight. According to the company, an outdoor system operated in the shade uses up to 10% less electricity than the same system in the sun.
  • The Department of Energy recommends running a stiff wire through the appliance’s drain channels to prevent clogging.
  • DTE recommends programmable thermostats that can be adjusted. Consumers Energy stated in its press release that smart thermostats can save up to 15% on electricity bills.

For window air conditioners, DTE Energy recommends replacing filters and installing seals around window units. Residents are also advised to place a room air conditioner in a darkened window.

“The heat from sunlight can cause the appliance’s thermostat to incorrectly measure the room temperature and run longer. A television or lamp near the appliance can have the same effect,” the company said.

Generally, the utility company also recommends checking your home’s insulation, since an average of 10 to 25 percent of the energy needed to cool a home escapes through air leaks. It is also recommended that you have the home’s ductwork inspected.

Contact Christina Hall: [email protected]. Follow her on X, formerly Twitter: @challreporter.

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