The thermostats control the heating elements in the tank, and they must both be set to the same temperature. Electric water heaters use electrical resistance to heat water. The heating elements, controlled by a thermostat, heat water in the tank.
Adjust both thermostats to the same temperature setting. WARNING! Higher temperatures increase the risk of scalding.
Only one element will come on at any one time. This is known as a flip/flop system. On a 240 volt water heater, there will always be 120 volts to both elements. The thermostat will direct the second leg of the 120-volts to the element to complete the 240 volts required to energize the element.
The two-degree rule serves as a golden compass when setting thermostats in two-story homes. This simple yet effective strategy involves setting each thermostat two degrees Fahrenheit apart. For instance, if you prefer a comfortable 72 degrees on the main floor, set the upper-level thermostat to 70 degrees.
In three-story homes, the most energy-efficient settings in summer are 78 on the upper floor, 79 on the middle floor, and 80 on the lower floor. For winter, set your thermostat to 66 degrees on the upper floor, 67 on the middle, and 68 on the lower.
Winter Thermostat Settings
You will want to take the opposite approach in the winter. Set the first floor's thermostat to your desired temperature, and then decrease the temperature setting on your thermostats by two degrees as you go up. Warm air on the first floor will rise and make the upper floors more comfortable.
A temperature of 68 degrees Fahrenheit is often considered the best temperature to set thermostat in winter to save money. But why is 68 degrees the best winter thermostat setting? In winter, heat loss through walls, windows, and doors is a significant contributor to energy wastage.
While there are occupants in the house, it is advised for homeowners to set their thermostats between 68 and 72 degrees to promote maximum comfort. A pleasant temperature for everyone in the house, regardless of the apparel they are wearing, is between 68 and 72 degrees, which is neither too warm nor too cool.
There are typically two heating elements in a standard electric water heater – an upper and a lower element. The upper element heats the water in the top portion of the tank first.
If the temperature is set to 74°F but the thermometer shows 78°F, you will have to recalibrate the thermostat to account for this 4-degree deviation. Even with older AC units or furnaces, you might have to recalibrate your thermostat from time to time.
Testing the Heating Element with a Multimeter:
Place one probe of the multimeter on the loosened screw and the other probe on the remaining screw attached to the face of the heating element. The multimeter should read between 10 and 30 ohms if the heating element is working correctly.
The good news is, working out the size of your heating element is just as easy. Simply use the BTU Calculator as normal and the results will provide the heat requirements in BTUs and Watts. The Wattage provided will be the total needed to heat the room to a comfortable temperature.
Each element has its own thermostat, and only one element runs at a time. The top element turns on first to start the warming process. Once the water in the top half of the tank reaches the set temperature, the top element turns off, and the bottom element turns on to heat the rest of the water.
The maximum Department of Energy recommended water heater temperature setting you should never exceed is 140 degrees Fahrenheit. The lowest recommended setting should never be below 120 degrees Fahrenheit.
120 degrees Fahrenheit is the safety recommendation against scalding, but 140° is the common default setting. Most experts agree that anything below 120 degrees creates a risk for bacteria to develop inside your water heater from stagnant water, such as legionella that causes Legionnaire's disease.
If your water heater has two thermostats, adjust both the same amount. The top thermostat should be a few degrees higher than the bottom.
Sediment buildup in your water heater can be a major problem. Not only will it reduce the amount of hot water you have for cooking, cleaning, and bathing, but it can also damage your water heater and shorten its serviceable lifespan.
If your water heater can't produce hot water, the top heating element has most likely burned out.
There may be drafts and pockets of colder air near the floor; The walls are colder and don't emit the usual amount of infrared radiation, so you lose heat due to your body emitting more IR than it receives; You may spend more time indoors and hence have less physical activity, so your body generates less heat.
Quick answer: The ideal house temperature is room temperature, which ranges from 68 to 78 degrees F, though this may vary from season to season. In winter, the average room temperature is generally 62 to 68 degrees, whereas in the summer, the average temperature is 72 to 78 degrees.
If you're cold even though your thermostat indicates you shouldn't be, your furnace likely isn't the problem. In most cases, it's working just fine. It's your home that needs attention. Lack of insulation, severe air leakage, and/or unbalanced ductwork are frequently to blame.
To save money, aim to have your temperature set around 68-72 degrees Fahrenheit when you're at home and awake. This is a comfortable temperature for most with the help of a light sweater. Overnight and when you're out, around 64 degrees Fahrenheit will keep your home at a good temperature.
Thermostat settings play a pivotal role in managing your heating system's efficiency. It's a common misconception that leaving your heating on at a constant temperature is more energy-efficient than turning it on and off. Does turning the heat on and off raise the bill each month? The answer is no.
The World Health Organization recommends keeping indoor temperatures between 64 and 75 degrees Fahrenheit for healthy people. The minimum temperature should be kept above 68 degrees Fahrenheit to protect the very young, the elderly, or people with health problems. Watch out for signs of hypothermia.