Anyone used this before? https://www.alphamalaysia.com/smart-revo-i

just get Panasonic, Joven or Alpha.
btw, Alpha brand quite ok because their technician will visit your house if your water heater got any issue. But of course is under warranty condition.

Are you telling the Alpha no good ?

You said it is good is because technician will visit if problem. I don't see the point of good on that heater unit.

Than only in warranty condition. Finish warranty, no coming ?

Anyone heard of hydro one?
https://www.hydro1.com.my/hydro-one-ecoheater/

Price ?

dun bother, macam like Seers. I stay away from any company got the word "Marketing" in their name

Ok boss.

Normally such rare heater in here will cost a bomb. They can claim how high tech and save cost, but the heater initial cost is high that can't return back the cost when calculate the usage.

Was quoted rm800 for 30 litres and rm900 for 50 litews

Bro care to share more?

Few hundred expensive. But price still afford I guess.

Go and try. Let us know here.

Makesure it safe enough. Don't pay too much attention on the high tech. But not safe to use.

According to the website its says zero risk of electrocution coz not using metal heating element.
Still dont know whether to choose Joven (RM 730 at 50L, using metal heating element and more electricity at 3kW+) or this.
Will share more if I try out the hydro one heater.

What type of piping do you intend to use for the connections?

If you use hdpe pipe( black with red lines) length more than 1 meter at both the input and output of the device.
There is zero risk of electrocution too.

If the shower you are using is non conductive and length of pipe more than 1 meter, risk also zero.

Just install any water heater correctly and you will not be electrocuted.

If you see the spec clearly, it didn't save much or pretty non. It selling point is the heating element.

Joven take 30min at 3kw to boil the water to 70°.

Hydro1 take 36min at 1.5kw to boil to 44°c. See the temp different.

I don't see the Hydro1 save in electricity.

And with temp 44 degrees, will end up using more of the hot water if use with mixer.

End up with needing bigger tank or higher wattage anyway.

30min at 3kW should be the JH35 model with 35L.

Hydro1 don’t have 30L model so let’s compare the 50L models from both brands.

Joven to 70C @
3kW takes 45mins
1.5kW takes 90 mins

Hydro1 to 44C @ 1.5kW takes 45mins, so it’ll take roughly 1 minute for 1C. To hit 70C I assume it’ll take an additional 26 minutes, so total time will be 71 minutes.

So with my assumption it performs ~26% better than Joven’s.

Please correct if I’m wrong.

Wrong.

It takes more energy and time if want to go higher. It is not a linear relationship.

Energy loss to surrounding due to temp difference will be more.

The lesser the temp difference between heating element and the water, the lower the heat transfer rate. Hence again, will take more time and energy.

So such calculation cannot be used. Any fluid thermodynamic engineer here that can shed more light ?

Fair enough. So now who can shed some light.

I’m just a layman. I’m looking at Hydro1 because of its claims of being safer.

Yes. Under warranty they will repair FOC but they charge RM70-80 trip cost! I have something broken within first year and still under warranty. They came and replace just something tiny (they told me it's not an expensive part), done within 10 minutes charged me RM70 or RM80 for the trip. Their reason is because their office is in Shah Alam. Like it's the consumer's fault that they are based deep inside Shah Alam?

After warranty period, it's trip cost + repair cost. Second time rosak, I just ask the person who helped me install the water pump to check (he got service water heater too).

I don't know if they're still doing the same policy, but I would not buy Alpha again. Of all the brands I used before ; Faber, Pensonic and Panasonic, this is the only one that I need to repair within first year of use.

This post has been edited by lowlowc: May 24 2018, 06:48 PM

So I am going to have one more water heater in my bathroom on ground floor. This bathroom has the best water pressure but unfortunately the developer did not install a water heater switch. Is it safe to add a switch? I think my old house at hometown add the switch for water heater, I just don't remember how they did it.

This post has been edited by lowlowc: May 24 2018, 06:55 PM

Get an electrician to do it properly.
Basically pull wire 4mm square from distribution board.
One end is a 20amp rcbo with 10mili amp leakage trip and the other end is a 20amp switch. Then from the switch 4mm square wire directly to the water heater terminal.

Any other way than that will have compromise on safety.