ᐅ Hot water connection for the dishwasher and washing machine?

Hello everyone,

My next consideration is whether I should have a hot water connection installed for the washing machine and dishwasher.

We are getting a ground source heat pump. It operates with a coefficient of performance of about 1:4.
I don’t want to buy an appliance with both cold and hot water connections. But since everything except possibly the washing machine rinse works with hot water, I thought that instead of heating directly with electricity, I could use the heat pump with a factor of 5 in between (plus an additional heat pump electricity tariff).

Does this sound logical, or am I overlooking a potential issue?

I had planned the same at the beginning. Just do a quick search, and you’ll quickly learn otherwise. Overall, it is clearly better to use a standard cold water supply for this, especially for the dishwasher.

OK,

I've done some research. A dishwasher requires a start program under 42°C (107.6°F) because of protein residues, and all laundry should not be washed at 55°C (131°F).
The need to run water until it gets warm is eliminated because of the circulation line.
Also, a mixing valve costs money, plus I would need a second water connection at the washing machine, which also costs. So, that’s off the table.

Same here.