I don't think so...but just want to confirm how a centralised storage heater work? issit for every rain shower,there should be 2 pipes connected to a valve,then u can adjust the heat of the water (which in turn connected to valve to adjust how much hot water and how much cold water mix to rain shower) by turning the switch?

My house currently only have 1 pipe connecting to rain shower.

oh man thats tragic

What kind of lightning risk for solar heaters? You mean risk of lightning hitting the solar panel?

It is ok sharing with a light which consume little power. 2 feet type is 20 watt and plus its ballast maybe takes another 20 watts. Total not more than 40 watts compare to 3kw a power point can support.

water pressure is the only thing i worry.
anyway thanks for your advice, will go ahead. 

Weikee,

If you are referring to electronic or a good ballast you are right. But in here we have to assume inefficient ballast for max calculation. See this web page: http://cannabis.com/growing/electric-How_M...really_use.html

It said, "....A good ballast will have a power factor above 0.9 (i.e. more than 90% of the power it draws is used to power the bulb). Cheaper (lower quality) ballasts often have power factors of 0.5 or less. That's right, only half of the power gets to the bulb. So a 150W lamp would be drawing 300W of power."...

I placed a deposit at HomeDec for DC-Heater yesterday.  Based on what the sales person mentioned and demonstrated, I'm quite convinced. Main features - low power consumption 350-750watts vs conventional 3000watts, no heating elements hence no risk of electrical shock. A fiend of mine bought the same brand at last year's HomeDec and have no complaints to-date.

Sales person mentioned that it only takes less than 5 min to heat up IF the switch has been switched off earlier.  Unlike conventional ways, she advised to keep the switch on 24/7 (cos it's low power consumption) unless you intend to go for holidays. She had a demo on the plate which is used in their water heaters. With just a little voltage from the cell battery, the plate took merely few seconds to heat up.

mmhh ... well I guess i just have to try it out. Maybe shd just try 1 for starters. Has anyone here tried and able to confirm the electricity charges?

Do u think it works as the same concept as an air-pot, whereby heated water is stored and kept warm and shd the water drop to a certain temperature, it will auto reheat to restore it ?? This company is also selling air-pot where they claim a cup of drinking water is heated within 3 seconds.

1, 2, 3, you can have your cup of tea! Microwave oven can't even do that! They can boil the ocean with this technology. Noone needs to die for the homeless during winter, they can just dip themselves in hot water This is god sent!

This company may have a good product but the way they market their product is out of norm. Looking at the facebook they condemned and published so much about the electrocution of the Japanese couple, so many similar report, to say that their product is ZERO danger and you are asking yourself to be killed using the conventional Instant water heaters. It is ok to warn buyers but exaggerate too much till frightening all existing users is too much and bad taste. What you want all the existing users to do? Throw away their heaters? A good company should not just warn but come up with not only alternative (buying their product) but also how you can minimize risks if not overcome.

I dont think their prodcut is any safer when it is all about water and electricity. Over selling and everything seemed to me are like they have a magic. Don't Kill and super safer of power and instant heating and up their price.

I do not know why you want to believe there will not be electrocution danger. There is heating element if not how you get to convert electric energy to heat energy? Yes there is no direct contact between the heating element and water but the heating coils is surrounding the copper water pipe for heat exchange. When heating element fail or broken or short circuit it needs not contact water to conduct electric current. The copper pipe will conduct current to water. Here is a diagram of a tankless single unit heater.

[attachmentid=3686476]

i think they are not bombarding you but the product..... 
anyway seers have 3 kinds of water heaters - instant, storage and heat pump
my guess is you got the storage kind. even the 40L cost around RM1400 which is like 3 times the cost of a normal storage heater

at seers website here they explain how it works - see if it makes sense to anyone

hahaha...i was about to say "inb4 weikee says rinnai gas heater"   

looking at the picture and explanation from Seers sales here - https://forum.lowyat.net/index.php?showtopi...post&p=62899187

i find it odd that the heated water needs to travel from tank 1 to tank 2 when there are two heating source C, one in each tank
maybe i see the picture wrong?

we all curious on how it works....some of us are a bit skeptical so Stargazer, please dont take it the wrong way  :

That's the thing - I have yet to confirm if my unit already has the hot pipe in place or not.  If it's in place then it could be the centralised storage ... otherwise the piping charges is a lot to pay for (exceed my budget)