Ariston AURES SLIM MULTI Electric Instant Water Heater 9.5 kW, Multi-point, Compact Size, Maximum Comfort, ELCB System, User-Friendly and Energy Efficient, Manufactured to be Installed in UK – 3520028 [Energy Class A]
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Multi-point model to supply multiple outlets with unlimited hot water (not simultaneously). | Front-facing dial and LED indication for ease of operation. | Water flow sensor to supply hot water at the desired temperature. |
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Products manufactured with the best materials for durability and reliability in all conditions. | Space-saving compact size of only 30.4 x 17.8 x 9.8 cm | Easy installation in only 10 simple steps. |
| Weight: | 3 kg |
| Dimensions: | 30.4 x 9.8 x 17.8 cm; 3 Kilograms |
| Model: | 3520028 |
| Colour: | White |
| Manufacture: | Ariston |
| Colour: | White |
I liked that it is compact and easy to install. It also works pretty much as I expected.
The reset function is not readily accessible as it involves removing the top cover. Other than that, I have no complaints after a couple weeks of use.
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.
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.
We have 2 now, first went into the summer house, second solved a long pipe run in the house that never got warm. Only thing to be aware of, this requires a30amp supply and cable
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.
Works well in the garage/studio to give us instant hot water.
Just had this installed and seems to be working well water pressure very good compared with my previous water heate
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.
The water heater I purchased was used in an outside shed over the sink. It was easy to install and works well water is hot enough for washing hands.
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.