How Much Energy Does a Water Heater Use?

Your faucets, showerheads and plumbing appliances consume lots of hot water. As a matter of fact, the Department of Energy says that water heating is the second-largest utility cost behind space heating and cooling, accounting for approximately 18% of your monthly bill. Discover how much energy the average water heater uses and helpful tips to reduce your water heating costs.

How Much Electricity Does an Electric Water Heater Use?

The total cost to run an electric water heater depends on the square footage of the unit, how much you use it, its power draw and what you pay for electricity. As an example, a medium-sized, 40-gallon water heater that draws 4500 watts and is active for just two hours a day at a rate of $0.13 per kilowatt-hour (kWh) costs about $1.17 to run per day, which comes to $35 per month or $426 per year.

How Much Natural Gas Does a Gas-Fired Water Heater Need?

If your water heater runs on natural gas, you need to consider the size of the unit, how much you use it, its power draw and the price for natural gas. For instance, a medium-sized, 40-gallon water heater that uses .205 therms per hour and is active for two hours a day for a price of $1 per therm costs about $0.62 to operate per day, which comes to $18.60 each month or $226 annually.

Gas vs. Electric Water Heater Costs

As you can conclude from the examples above, gas water heaters generally cost less to run than comparable electric models because natural gas prices are likely to run lower than the price of electricity. Refine the calculations with your exact energy usage and rates to build a more accurate picture of gas vs. electric water heater expenses.

Tips to Reduce Your Water Heating Bills

Whether your water heater uses electricity or gas, you can lower your utility costs with these money-saving tips.

Revise Your Hot Water Habits

Keep in mind that every time you turn on a hot water tap, you have to pay to heat it. Modify your day-to-day habits to reduce costs. Here’s how:

  • Take faster showers. 
  • Only use the dishwasher and washing machine with full loads. 
  • Minimize pre-rinsing dishes before placing them into the dishwasher.
  • Launder your clothes in cold water whenever possible.

Resolve Plumbing Leaks

Leaky faucets, showerheads and pipes can waste large quantities of hot water. For example, one drip per second adds up to more than 1,600 gallons each year. Eliminate this waste by fixing plumbing leaks as soon as you notice them.

Install Low-Flow Faucets and Showerheads

Modern laws require new showerheads to consume 2.5 gallons per minute (gpm) or less while kitchen faucets are limited to 2.2 gpm. New bathroom faucets must have flow rates below 1.5 gpm.

You can buy quality, low-flow kitchen and bathroom fixtures for around $10 to $20 each, resulting in approximately 60% savings on water use. Try to find the ENERGY STAR® WaterSense label to increase efficiency without negatively impacting performance.

Turn Down the Water Heater Temperature

The default setting is 140 degrees. Lower this to 120 degrees to save on water heating costs and minimize the chance of scalding at the tap. Just don’t go any lower than 120 degrees to avoid microbial growth inside the tank.

In case your water heater doesn’t include a temperature readout, determine the setting with a thermometer at the bathroom or kitchen faucet. Adjust the water heater’s dial, wait two hours and measure the water’s temperature. Repeat this process until the thermometer reads 120 degrees.

Add Insulation

Both electric and natural gas water heaters can be insulated with special jackets available at home improvement retailers. Be careful to install the insulation correctly to avoid creating a dangerous operating situation. When in doubt, ask a professional for help. Once the tank is insulated, add insulation to the hot and cold pipes coming from the water heater to help things heat up faster at the faucet.

Buy More Efficient Equipment

In case your water heater is approaching the end of its life span, consider replacing it with an ENERGY STAR-rated model. A tankless water heater is one such option. This upgrade can save up to 34% on your water heating bills by heating water on demand and getting rid of standby heat loss. Save even more by replacing your hot water appliances with high-efficiency models, including your dishwasher and washing machine.

Schedule Water Heater Services with an Expert

Wesley Wood Service Experts is your source for dependable, affordable water heater services in North America. Our highly trained technicians can satisfy any water heater repair or replacement request that comes our way. We carry top products from today’s best brands, including conventional tanks as well as tankless models, to suit your needs while staying within budget. To find out more, please contact your local Wesley Wood Service Experts office today.

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