Should I go with tankless point of use water heaters?

[Deleted member 115596]

Hi,

I'm renovating (rewiring electricity, redoing and adding water pipes, gas pipes, moving walls) a house for the first time ever and, among other things, I will need to sort out hot water. Understandably, I have some questions.

It's a very small house currently with only a kitchenette downstairs and no bathroom. I will add a bathroom upstairs directly above the kitchen. I'll need hot water at 3 points - kitchen sink, bathroom sink and shower.

As I said, it's a small house with limited storage space so I'd like to avoid installing a central tank water heater. Also, that would mean more pipes and yearly servicing (if central, it would be a gas boiler).

Only one person will live in the house for most of the year and one more person (2 total) for a few months, so there isn't going to be a lot of water consumption really.

I'm thinking of adding point of use water heaters. I'd like to have instant limitless hot water, so (with my limited knowledge on the subject) I'm thinking to go tankless PoU.

If tank PoU, what size tank? Also under or over sink?

It's in Italy, if ot is relevant at all - voltage and that sort of thing.
I'm waiting for the water pressure info from the relevant authorities, but it seems pretty normal from what I can see coming out of the tap.

What should I do? What should I know?

Thanks.

 

[rpm]

Thinking the shower will be a problem ie could it keep up with demand and at what cost electricity wise.

 

[moonlight]

Multipoint water heater like this, would need to be installed by a gas registered engineer.

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[Murdoch]

And the electrics need to be designed, installed and tested by a competent spark (assuming you aren't one) - water and electricity needs careful consideration

 

[Deleted member 115596]

Thanks all for the answers!

Ok, so what I'm understanding so far is:

- PoU heaters (shower especially) would be too costly electricity wise and wouldn't be very efficient at getting me instant continuous hot water.

- No need for a large gas boiler since we won't have centralized gas heating and need the heater/s for hot water only.

- Best thing would be to get a gas Multipoint water heater (am only hearing about these now for the first time but they sound awesome). That would take care of the downstairs tap and upstairs tap and shower. The model that moonlight linked works with up to 4 points.
Now... a gas engineer would install it, but just so I can start planning things... is it better to have the multipoint heater upstairs? What else should I know?

 

[moonlight]

Thanks all for the answers!

Ok, so what I'm understanding so far is:

- PoU heaters (shower especially) would be too costly electricity wise and wouldn't be very efficient at getting me instant continuous hot water.

- No need for a large gas boiler since we won't have centralized gas heating and need the heater/s for hot water only.

- Best thing would be to get a gas Multipoint water heater (am only hearing about these now for the first time but they sound awesome). That would take care of the downstairs tap and upstairs tap and shower. The model that moonlight linked works with up to 4 points.
Now... a gas engineer would install it, but just so I can start planning things... is it better to have the multipoint heater upstairs? What else should I know?

I would put it in the kitchen if possible on an outside wall.