The tech costs more than conventional options upfront, but federal tax credits, new 120V models and strong savings have made them more appealing than ever.
It is, but the dishwasher has to have a water heater in it. It has to heat water to a temp that you shouldn’t keep you got water tank at and heats throughout the cycle.
Your clothes washer (generally) also has a built in water heater.
My tank is 60° and my washing machine is 40° and dishwasher is 70° at a maximum. A lot more efficient to have a hot water feed to these that have them increase the temperature 30-50°.
In most places in Europe, hot water that’s been stored is treated with some suspicion. Besides, having a heating element is probably the least error prone thing you could make.
Genuinely for the longest time you’d only ever see mixer taps at a kitchen sink, they were not allowed anywhere else for fear of stagnant hot water contamination.
I don’t think you understand how it works if you think there is an opportunity for disagreement here.
It is more efficient to heat hot water to hotter water than it is to heat cold water to the hotter level. If I have a tank of hot water doing nothing why wouldn’t it be more efficient to use that instead of cold water?
ya no, I think you might be the one overlooking something here, you talk about efficiency, but leave out the energy needed to heat the water to “hot Water” in the first place, all you did was split the work, and ignore everything leading up to the second work step.
you are getting water from the tap, let’s say 10°C and need it heated to 70°C, it will always require the same amount of energy input (10°C->40°C->70°C is the same amount of energy as 10°C->70°c), but if you centrally heat part of it you will lose energy while you store it, and during transport.
My air to water heater operates at 4.3:1 efficiency and heats to 60°. It stores it and loses 1° a day. The dishwasher would need to heat the water just 10° more given the tank is in daily usage.
Otherwise the dishwasher would have to do it on in a faster timeframe. This is why electric power showers are more expensive to run than mains showers, they have to heat quicker which takes more energy.
fundamentally, water takes the same amount of energy to heat up, no mater the time frame, most commonly the “mains showers” are cheaper to heat because many run on some combustible
Yes but we are not heating water with 100% efficiency. So it’s not the same, it is cheaper and more energy efficient for me to use my air to water heater to heat water and store it than it is to burn coal to generate electricity to heat an element to bring water to the same temperature
That seems way less efficient and more prone to issue than just having a central appliance that’s responsible for making hot water.
It is, but the dishwasher has to have a water heater in it. It has to heat water to a temp that you shouldn’t keep you got water tank at and heats throughout the cycle.
Your clothes washer (generally) also has a built in water heater.
My tank is 60° and my washing machine is 40° and dishwasher is 70° at a maximum. A lot more efficient to have a hot water feed to these that have them increase the temperature 30-50°.
In most places in Europe, hot water that’s been stored is treated with some suspicion. Besides, having a heating element is probably the least error prone thing you could make.
Do they not have mixing valves where you are?
Genuinely for the longest time you’d only ever see mixer taps at a kitchen sink, they were not allowed anywhere else for fear of stagnant hot water contamination.
That probably means that the hot water tank needs to be larger though. Guess it depends on the heating source though
Hundreds of engineers and scientists who designed modern dishwashers disagree with you
I don’t think you understand how it works if you think there is an opportunity for disagreement here.
It is more efficient to heat hot water to hotter water than it is to heat cold water to the hotter level. If I have a tank of hot water doing nothing why wouldn’t it be more efficient to use that instead of cold water?
You misunderstand on-demand hot water
ya no, I think you might be the one overlooking something here, you talk about efficiency, but leave out the energy needed to heat the water to “hot Water” in the first place, all you did was split the work, and ignore everything leading up to the second work step.
you are getting water from the tap, let’s say 10°C and need it heated to 70°C, it will always require the same amount of energy input (10°C->40°C->70°C is the same amount of energy as 10°C->70°c), but if you centrally heat part of it you will lose energy while you store it, and during transport.
My air to water heater operates at 4.3:1 efficiency and heats to 60°. It stores it and loses 1° a day. The dishwasher would need to heat the water just 10° more given the tank is in daily usage.
Otherwise the dishwasher would have to do it on in a faster timeframe. This is why electric power showers are more expensive to run than mains showers, they have to heat quicker which takes more energy.
fundamentally, water takes the same amount of energy to heat up, no mater the time frame, most commonly the “mains showers” are cheaper to heat because many run on some combustible
Yes but we are not heating water with 100% efficiency. So it’s not the same, it is cheaper and more energy efficient for me to use my air to water heater to heat water and store it than it is to burn coal to generate electricity to heat an element to bring water to the same temperature