Ozak bro, i am looking for water heater so i came through this thread.

After some survey some of the sales mention panasonic using mechanical type ELB.

However i did not found any RCB in the heater.

In this case, is this Panasonic Heater safetier than those normal electronic type ELB like Alpha? (of course i will change every 5-6 years, what i means in technical way)

From the description, does it include RCD?

Thank you for the explanation, my house is new condo unit. So in this case i am recommended to have this kind of Instant Water Heater + RCD switch outside the bathroom. Is that what you means?

i dont think they provide, they dont even provide the water heater switch.
i will check again and update you all.

Thank you ya