What's the hot water temperature is the most suitable and the cheapest for your home
Usually we use a mixing valve for bathing, that is, high-temperature hot water provided by air to water heat pump, and then hedge with cold water in the valve to get the desired temperature through the debugging of the valve. So what is the most suitable and cheapest high temperature hot water provided by air to water heat pump?
Let's do a simple hot water experiment:
Open the hot water valve of your air to water heat pump in the shower. Turn the hot water to the top, not the cold water. Then, put your hand in the water. If you are afraid to do this, because you are afraid that your hands will be scalded, so the maximum water temperature is not suitable for you, then your air to water heat pump temperature setting is too high, you may waste a lot of energy and electricity.
So is the water temperature set correctly? In winter, most people set the temperature of the water tank water heater to 50 ℃and in summer it is usually set to 45 ℃. However, it needs to be adjusted according to the actual situation. If you have never adjusted the temperature of air to water heat pump, the default temperature of air to water heat pump may be set to 55 ℃, which is the default setting of most manufacturers. Do you want to see if your air to water heat pump is set correctly?
So why does the manufacturer set the default setting of air to water heat pump so high. After all, most people don't like to shower at 55 ℃, so why is the default temperature so hot?
There are many reasons. First of all, the default temperature of air to water heat pump is set to 55 ℃by default in the industry. This is to ensure that your air to water heat pump can provide enough heat for you in very severe winter. It is also considered that your water pipe is very long and may lose heat. But as far as the setting you can adjust at home is concerned, your local and current climate does not need to set such a high water temperature is enough. At the same time, a better way to prove that your air to water heat pump can work at any time is to let the faucet or shower pour out the maximum temperature water. If it is hot, you can use the mixing valve for debugging.
Another problem is that insufficient hot water may lead to bacterial growth. Although the risk of Legionella breeding is small when the hot water tank temperature is maintained at 55 ℃, this level is still safe for most people. If your immune system is suppressed or you have chronic respiratory disease, you can consider keeping the hot water tank at 55 ℃. However, this high temperature can significantly increase the risk of burns. To reduce this risk, you can install a mixing valve or other temperature regulator on any faucet used for cleaning or bathing.
So the important thing is, how much can you save by lowering the set water temperature of air to water heat pump? Reduce the air to water heat pump temperature by 5 ℃to save 3% to 5% of the energy cost, so reducing the temperature from 55 ℃to 50 ℃can save you 6% to 10%.
Air to water heat pump is the annual energy cost. A simple change can save you $6 to $20 a year. If you accidentally turn the hot water too high, it can also prevent you from being scalded.