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 Post subject: Hot water solution
PostPosted: Fri Sep 22, 2017 9:36 am 
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Hi,

I have a Hot water heat pump with a 300L tank and a house with 5 people (2 adults and 3 kids). We use the hot water to wash the dishes and showers. On a typical winter day, the water is not enough. I reckon that it would be enough just for the showers, but not for showers + dishes.

I am thinking of getting a smaller solution for dishwashing. My first idea was an electric tankless water heater, but I would like to hear your suggestions and ideas. If you think this is a good solution, any specific recommendation?

Thank you all!


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 Post subject: Re: Hot water solution
PostPosted: Fri Sep 22, 2017 10:38 am 
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I quite often boil a kettle to wash dishes.


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 Post subject: Re: Hot water solution
PostPosted: Fri Sep 22, 2017 1:25 pm 
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We installed an electric instant hot water unit in a holiday let some time ago. It was around 8KW (IIRC)
Flow was "adequate", but not the same as "normal" HW as I remember it.
Higher power units are available these days.


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 Post subject: Re: Hot water solution
PostPosted: Fri Sep 22, 2017 3:49 pm 
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Dish washers can use either hot or cold water I would simply swap the pipe and let the dish washer heat the water. Hot water fill on the dish washer can save some money, but starting cold and heating up while it washes does a better job of cleaning.

If you hand wash dishes they are not as clean as using a dish washer and at around £160 for a counter top dish washer there would be very little in the cost of a heavy cable and a under sink instant heater to cost of dish washer, for the pre-heat type with a 7 litre tank you could still use a 13A outlet. Or of course fit an immersion heater as well as heat pump.


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