Ariston AURES Multi Electric Instantaneous Water Heater 9.5kW, Multi-Point, Compact Size, ELCB System, User-Friendly and A Energy Rated. Manufactured to be Installed in UK – 3195216.

It certainly heats the water and to very high temperatures if you reduce the flow at the tap enough. The only thing to watch out for is the length of the draw between the water heater and your tap - longer the draw the longer it takes for the hot water to reach the tap obviously. But as this takes an additional few seconds to really begin to heat the water anyway (think electric shower) when you add that to a long draw from the heater to the tap it can take a little while before you get properly hot water at the tap. That's not a fault with the device it's simply a case of managing your expectations.If it's closer to the tap that should obviously reduce wait times.The install will require an electrician to be compliant and won't be cheap. I paid £75 for the water heater (half the price on Amazon that it was from local retailers) but the 12m of 10 square cable, a couple of tektite plumbing fittings (6) and an RCBO for the fuse board cost me an additional €150 (bought locally). Add to that the cost of an electrician and possibly a plumber if you can't install yourself.Short answer is if you are planning on installing yourself the water heaters that heat and store a little water are much easier and cheaper to install. Simply plug in and attach cold feed / hot out.Downside of those is you have a limited amount of hot water depending on your model 10 / 15l. Once it's used it heats slowly over time to replenish and then keeps the water hot by intermittently turning on the heating element when the water temperature drops. That uses more electricity than an instant water heater as it's technically heating 24hrs a day (intermittently) even if your not home or not using the hot water.I have this installed about 15ft from the bathroom tap and it also feeds the kitchen tap about 30ft away. It works, the water is very hot at low flow rates but as soon as you open the tap fully it quickly cools to at best tepid temperatures. To be fair at the moment the mains water that it is connected to is icy cold coming in so it has to work really hard to heat it. I imagine during warmer months when the water coming in is not just a few degrees above frozen it will work much better.A shorter draw and taking water from a storage tank that's properly insulated as opposed to nearly freezing mains water would eliminate many of these problems but I didn't have that option.If you need unlimited hot water, don't want to waste electricity, can manage the install yourself and have realistic expectations this is a great product.

The product was straightforward to install and worked reasonably well for around 6-8 months after being installed by professionals following the manufacturer instructions.However, the product then developed a leak on its internal tank (pictured). On inspection, the internal seals on the tank are very poor single seals with multiple points of failure, so this is a poor seal/tank design. Leaks are inevitable.The internal high power (40 amp) electrical contacts are exposed to the water leak from the tank.In my case, the leak caused fairly extensive damage to my property which will require the replacement of wall panels, skirting and floor boards.Ariston were willing to replace the faulty unit, but were unwilling to cover any of the repair costs for the damage to my property, even though they are required to do so by law (Consumer Protection Act 2015) or offer any other form of compensation, simply claiming (erroneously) that this is not within the terms of their warranty and therefore they are not required to do so.Do not buy this product and avoid buying any products from Ariston if possible, due to their poor customer service.

First thing worth saying is I didn't have any of the installation issues experienced by other reviewers. No issues getting to the fixing holes and no issues getting the cable through the entry hole at the side. Either the design has been improved or the other reviewers are unskilled.Installation manual says 6mm2 cable is sufficient but it's borderline. After looking at wiring regs (UK) I found I had to use 10mm2 and what I'm doing is not extreme (12m cable run, clipped - not in trunking etc.).Just to be clear to DIYers you cannot plug this in to a mains socket. It draws three times more current than your plug sockets can handle. You need a dedicated 40A circuit breaker and wiring and you will need an electrician to install it. That will probably cost you more than the heater.Also for the DIYers you need to know that this heater will not produce hot water at mains flow rates. You need to reduce the flow rate to get warm water. The slower the flow, the warmer the water.I replaced an 8.5kw shower with this heater and I'm getting mid 30 degrees water temps at about 3.5l/m (incoming water temp is about 5 degrees at the moment). Curiously this is slightly less than I was getting with the shower which is 1kw less powerful. The only explanation is the pipe run which is now a few metres instead of just the length of the shower hose. Something to think about.Without flow restrictors it's quite difficult to get the right temperature water. With the tap wide open at mains flow rates the water is stone cold. Close it slightly and it's too hot to touch. Flow restrictors made it much easier to regulate. The manual says they are mandatory, though I'm not exactly sure why, but I would install them every time anyway.It has three settings - low (4kw) / medium (5.5kw) / high (9.5kw). There is hardly any difference between low and medium and both only heat water if the flow rate is exceptionally low. I can't see myself ever using these settings.The only thing I'm somewhat unhappy about is the temperature varies quite a lot. This is not linked to water pressure/flow rate. It's like the heating element is switching on and off. This makes getting a steady temperature for showing difficult.Overall I would recommend but if you're not a professional plumber/electrician or experienced DIYer you will need help.