Even Panasonic latest instant water heater looks like also using EL©B, mentioned inside "See All Specs" in the link below.
http://www.panasonic.com/my/consumer/home-...dh-3ndp1ms.html

Recent news stated something like this:
Source: http://www.freemalaysiatoday.com/category/...-heater-unsafe/

Looks like I should change the instant water heater switch to the one equipped with RCD.
I hope that the ELCB and RCD can work well together.

Bought one during fair, used for about a month, so far so good, satisfied.

1) With temperature set to a fix value, the power applied to the water heater depends on the incoming water flow rate, example, if water flow rate suddenly lowered, the power applied to the water heater will be lower also, hence reduce power consumption, and vice versa.

2) Water pump is always turned on whenever the unit is turned on via the push On-Off button, no way to turn off the pump manually. The pump noise level is acceptable for me, not too loud.

3) Water temperature settings retains as long as you don't turn off the main power supply to the unit. The clock settings will always get retained, regardless of the main supply, because there is a coin battery inside the unit.

The Panasonic water heater operating differently than the Alpha water heater.

Alpha water heater does not have additional "On-Off" switch on the unit itself versus the Panasonic one.

To operate the Panasonic water heater, the water supply has to be turn on all the time, just switch on and off the water heater by pressing the "On-Off" button on the unit, given that the circuit breaker is on. The product manual has specifically mentioned that do not turn off water supply to the water heater when the unit is operating, or something similar to that.

For me, the water pressure coming out from the Panasonic DH-3NDP1MS water heater is just nice.
Staying in around the middle floor of a 29 floors condo.

My preference towards not so powerful water pressure as I do have experience using water heater with high pressure water that feel hurt on my skin during showering.

I believe this water heater can vary its pump speed according to the incoming water pressure, to maintain steady water pressure or flow and also water temperature.

I bought the same Panasonic water heater for my parent house.
My parent house is landed house, where upper stair water pressure is very low. Whenever someone use water downstair, there will be almost no water coming out from the previous water heater shower head.

Since changed to this Panasonic water heater with pump, no more this problem, I can't give you a percentage boost from the pump, but it does solve low water pressure problem.

I do not own the non-jet pump version of the water heater so I have no idea, but from the spec, it looks like the non-jet pump version just lack of the pump only, if compare to the jet pump version.

I do not actually know how many amp use, but from the spec, the rated power is around 3.6kW, so around 15 Amp. My condo existing wiring no problem with this water heater. Switch better use double pole switch.

I just tried, the ELCB button works only whenever the unit has power supply to it.
Pressing that button without power supply won't produce the "click" feeling and sound.

Yes, the button on the face of the water heater, not the button ELCB reset button.

I think you had use older Panasonic or National water heater before, where the ELCB button can be press even without power supply to the water heater.

Just my observation for running my instant water heater with and without water pre-filter or sediment filter.

My house has two instant water heater installed, before I install water pre-filter for my water heater, I use only one water heater for like 3 months, in washroom A.

I started to notice that there is a sort of sediment deposit on the shower head. The deposit is close to a white colour, and because the shower head is black in colour, the deposit can be easily spotted.



This white deposit can be wiped off using finger.

After I installed water pre-filter on both of my water heater, I started to use water heater in washroom B.
It has been around 6 months and there is no white deposit seen on the water heater shower head in washroom B.

But I can see the water pre-filter cartridge turned from white to brownish colour.
So it looks like the white deposit on the shower head is indeed sediment.

I would recommend to install pre-filter or sediment filter on water heater if you want your water heater to last longer.
Landed house or apartments that are able to install point of entry (POE) filter, will not need another filter install near the water heater.

Especially storage type water heater, sediment build up in the tank slowly and when years passed, the water heater may have reduced heating efficiency or even malfunction depending on the seriousness.

I understand the important of POE filter.
But poorfag like me can't afford landed house, condo management not allow us to install POE filter at meter side.
And I have tried requesting management and even developer for water piping layout so that I can scope out the point where I can install POE filter inside my condo, but sadly there is no such layout available from both of the parties.
Therefore I will have to live with POU filter.