Ariston AURES SLIM MULTI Electric Instant Water Heater 9.5 kW, Multi-point, Compact Size, ELCB System, User-Friendly and Energy Efficient, Manufactured to be Installed in UK – 3520028

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.

I had this installed for a garage/home office refub. had to go on 40A fuse and 10mm wires. Initially it didn’t seem to work and I didn’t get any hot water from it. I called it out to Technical support who advised to cut the flow rate of water inlet to 4Litres/Minute. This worked. So you need to cut your flow rate if like me you have good flow on your inlet. Using 4Litre/Min, on hottest gets quite hot (I didn't measure the temp) but it was too hot to touch. Using with a mixer tap was also ok and warm enough to use to wash hands. Probably good enough for wash basins and kitchen sinks but if you intend to use this in a shower possibly not the best solution as the flow rates that will give you any meaningful hot water will be pretty poor.

Did the job we needed. Had a new kitchen fitted and installed this under the sink, works perfectly. No problems fitting, nice to have hot water very quickly.

This product is a real shame from a reputed manufacturer. It took 5 hours to install this product. 3 hrs by the electrician to buy the flex wire thick enough to handle 9.5Kw of power. The space given on the back is not sufficient for the thick power cable. Then it needed a 40 amp socket, you cannot plug this on usual 13 Amp socket. It took 2 hours for an experienced plumber to install this unit as the wall mount is difficult to reach and he had to disconnect the power cable and had to open the unit to screw it to the wall. And the result was very bad indeed. With full water flow, the water was not reaching even luke warm when highest temperature setting was selected. We had to reduce the water flow to 2 litter per minute to get luke warm water. They claim this unit capable of handling 9 litter per minute flow, totally false claim. I connected it to shower unit, because of the restricted flow, shower is not useful at all. I have to now rip-off this useless kit and replace it with 100 litter water heater. Pls don't waste your time and money on this unit.

After giving a 5 star review the unit failed after just 8 months. I tried to return the unit only to be told the warranty expired in February. I bought the unit in October. I believed all electrical goods would have a 12 month warranty not just 4 months?. I have had to order and pay again for another unit as I didn't want to repipe the sink. I would be delighted to hear a response from Ariston.