Yes, turning off a hot water heater saves electricity by stopping standby heat loss. However, the savings for daily on/off cycling are minimal (around 5% to 12% of your water heating bill, or about $ 20 to $ 70 per year). The unit consumes a large amount of energy to reheat the cooled water, and repeatedly flipping the circuit breaker can cause wear and tear.
The energy experts say it's about $1.36 a day. The question you have to answer is whether it's worth it because there are some inherent problems with turning a water heater on and off. No hot water when you return. Lukewarm water doesn't really do anyone any good.
It's better to leave the hot water heater on all the time, rather than turning it on and off. This is a very common energy saving myth. But in fact, you really don't need to be heating your water all the time. Your immersion heater or boiler will heat up hot water which is stored in a tank.
Shut Off The Water Heater
If you have a gas water heater, you can turn the heater off at the source and shut off the gas valve. If you have an electric heater, it can be turned off at the breaker. Once off, you can open the valve or spigot on the water heater to drain the water into a pail or bucket.
If your model has a built-in timer or is connected to a smart home system, set it to heat water early in the morning or overnight. That way, you've got hot water when you need it, without heating during the most expensive hours.
Some common causes of high water bills include:
If you're not sure how long it takes, try turning the heating on about 30 minutes before you need it. You should turn it off 30 minutes before you'll stop needing it. You might need to turn on your heating earlier if your home takes longer to reach a comfortable temperature.
Potential Risks of Leaving It On
Leaving your water heater on during a winter vacation can pose several risks, including leaks and unnecessary energy consumption. Water heaters, especially older models, can develop leaks over time, which may go unnoticed if you're away. This can lead to water damage and costly repairs.
To compensate for heat loss, you may need to slightly increase the water heater's thermostat setting during winter. The recommended temperature is between 120–140°F for most households.
To prevent catastrophic leaks while you are away, turn off your home's main water supply valve, open a high faucet to relieve pressure, and turn off your water heater. This simple routine takes just a few minutes and protects your home from severe water damage.
If the main water supply is off, the tank might run dry. If the heater keeps running without water, the burner can overheat and damage the unit. This can lead to expensive repairs or warrant a complete water heater replacement.
Reducing water heater energy consumption can cut your annual utility bills by up to 10%. The most effective actions include lowering the thermostat to 120°F, insulating older tanks and pipes, fixing hot water leaks, and upgrading to a heat pump water heater.
A 10-minute shower typically uses 12 to 25 gallons of hot water, depending on your showerhead's flow rate and how hot you keep the water.
Yes, it is perfectly safe to turn off your hot water heater for a week. However, to prevent bacterial growth like Legionella and avoid damaging the system, do not drain the tank.
Did you know that your home's electric water heater could be driving up your energy bills? In fact, water heating is often the second-highest source of electricity usage in your home. According to the U.S. Department of Energy, about 18% of your total electric costs come from water heating alone.
Lowering your heat instead of turning it off saves energy, protects your home, and avoids costly damage. Experts recommend setting your thermostat back to balance efficiency, safety, and comfort. Turning off your heat completely can lead to frozen pipes, mold growth, and strain on your heating system.
In winter, you should set your water heater between 120°F and 130°F (49°C to 54°C). This range strikes the perfect balance between keeping your hot water warm enough to offset the cold incoming groundwater and keeping your energy bills and scalding risks in check.
If your hot water runs out fast and your shower goes cold after 5 minutes, you are not alone. This problem usually comes down to capacity, heat production, or mixing issues inside your plumbing system. Sometimes the fix is simple, like adjusting your water heater temperature or flushing out sediment.
Q: Can a water heater freeze in a cold garage? A: It's possible, especially in very cold climates. To prevent freezing, ensure proper insulation on pipes, choose a model rated for cold environments, and consider installing a unit with built-in freeze protection.
2. Do I need to turn off my water heater when I leave? Yes. Either drain it or set it to “vacation mode” to prevent issues while you're gone.
As a precautionary measure and to prevent damage and potential hazards, it's always best to turn off your water heater (both the heating element/gas supply and the water supply valve to the heater) if the main water supply to your house is shut off.
No, you should not drain your water heater for a standard vacation. Draining and refilling the tank is a major hassle and carries risks—like accidentally dry-firing electric elements. Instead, for optimal safety and efficiency, leave the tank full and turn it to its "Vacation" setting (or 120∘𝐹).
In most homes, Heating and Cooling (HVAC) systems drive the highest energy costs, accounting for nearly 40% to 50% of your total electricity bill. Following these, the appliances that run up your bill the most include water heaters, refrigerators, and laundry machines.
Inadequate or inconsistent insulation, like air leaks, can create hot and cold spots throughout your house. If you've ever seen any of your home's insulation, it's probably what resides in your attic or crawl space.
Heating and energy expert Stephen Hankinson said that one "big energy cost saver" is to make sure you have your heating off when you're not at home. For instance, if you typically arrive home from work at around 6pm on weekdays, you could set your heating to activate just as you walk through the door.