Yup. It is centralize. Not individual.

Another important is how to not waste the hot water to minimize the cost lost. Water and energy.

Yes, that's where closed loop plumbing for hot water comes in handy. A large tank with a recirculation port overcome this issue and assures the pipes have hot water by using a timer on a recirculation pump.Then combine that with whatever makes sense economically.

This post has been edited by halcyon27: Jan 6 2018, 02:48 PM

Local people here less understand about energy saving and contractor less experience on such advantage saving.

That why we here still pretty basic about hot water and saving energy compare to western.

Oh well, you see how seller push their products you know why.

Many usually look at initial investment cost, don't look at running cost. Heating is not Malaysia critical requirement.

You're right, i completely scrapped the idea of having to install the solar water heater when the piping cost more that the heater itself.

Worst thing is it still use electricity if the water is not hot enough. i wonder if in the end there will be any saving at all when compare to install instant water heater.

Hi all,

I am in the market shopping for water heater, and are considering between gas type or solar...I wonder anyone been using the gas type willing to share his/her experience?

There are a lot of questions on my mind -

1. Is it true that gas type heater only work on centralized gas supply? how about those cylinder type tank supply? Will it be a complicated installation process?

2. For a family of 5, how long will a tank last, assuming it can run on tank type.

3. Safety wise, is it safer than electricity instant type?

4. Only Rinnai? any other brand?


After some calculation I think I am convince that gas type probably is the most energy efficient (not same as cost efficient) but that is just my 2 cents...and I been trying to contact Rinnai for the last two weeks....

ROI will be very long, be it solar, gas or storage. The guaranteed part is enjoyment of hot water when you need it most (for Gas and Storage)

A quick update for the benefit of everyone...I manage to get a quote for the gas type heater (instant) outdoor unit. The cost is about RM 3k but the piping is the real killer where I was quoted about 800 per bathroom/kitchen....without the mixer. So total piping will be 4k for my project! This might be the game changer for me...I will be deciding on this soon.

The fortunate part is that the gas unit itself is cheaper than expected and cheaper compared to solar system....

RM800 is enough to buy a basic Panasonic water heater below RM300, installation of ~RM120

RM420... so there's RM380 extra to pay for electricity. 3.6kW @ full power
At average of RM0.50/kWh, assume you shower at 30 minutes with 2/3 power is 2.4kW.. RM1.2 per shower.. let you shower 2 times a day, RM2.4..that's 158 days of shower..

You add in the cost of the mixer, the cost of the gas heater itself... do your maths bro

I totally agree with u, that is why i said this could be the game changer. Yet, i simply dont understand why the piping is so expensive?

The work hour needed should be the same if u are laying pipe (regardless of pvc or copper or stainless steel) so the material difference should be the primary cost.......... maybe i should DIY the piping?

You should try DIY and you will be understand.

It is different work hr for each material different. Which PVC is cheaper and easy to work.

2nd is the overall laying the piping. If 80% or 90% of the pipe require conseal, that cost higher and more work to do. Compare running on the wall.

Try it and let us know here.

Hi...anyone know about SOLAR WAVE solar water heater??hows the quality??any comments??



This post has been edited by meeememe: Apr 21 2018, 10:08 PM

website: microsolarsystem.com
facebook : Microsolar System Water Heaters
email : microsolar@hotmail.com
tel : 03 56373735, 0133625965
The worlds highest temperature solar water heater. no electricity.

website: microsolarsystem.com
facebook : Microsolar System Water Heaters
email : microsolar@hotmail.com
tel : 03 56373735, 0133625965
The worlds highest temperature solar water heater. no electricity.

Microsolar is the longest lasting highest temperature solar water heater, we have customers from 22 years ago 1996 water still hot. No other solar water heater in Malaysia lasts that long? Although the Microsolar warranty against manufacturing defects is 3 years, if the unit can last 3 years it means no manufacturing defects, in actual fact the Microsolar will outperform and outlast many other solar water heaters (of course assuming all brands of solar water heaters are serviced regularly once every 4 to 5 years against the dirt and sediment and limescale prevalent in Malaysian tap water. Having a whole house water filter is recommended. ) There is no point in having a 10 or 15 years warranty when the water is not hot or the company closes after 4 years, or if the unit starts to leak after 4 years.. Similarly having a large capacity solar water heater is of no use if the water is not hot after two years due to clogging of bottleneck piping of single vavle solar heaters. Look for efficiency high temperature multi vavle and no electricity usage like Microsolar.

website: microsolarsystem.com
facebook : Microsolar System Water Heaters
email : microsolar@hotmail.com
tel : 03 56373735, 0133625965
The worlds highest temperature solar water heater. no electricity.

Even tho Microsolar produces the most hot water/highest temperature per square meter of panel , there are limits as to what the most efficient solar heater can do. We have to be realistic, please plan for your number of pax carefully. But Microsolar is very suitable for hostels and hotels as it is the most efficient in the world, ie shortest ROI. The largest solar water installation in Malaysia at UCSI University Taman Connaught 2017 see www.microsolarsystem.com using no electricity . Most UCSI University campuses in Malaysia, Taman Connaught, Taman Taynton Le Quadri Hotel, Marang Kuala Trengganu, Kuching, Bandar Springhill Port Dickson, are using Microsolars for their thousands of students without electricity. No problem there..

Mount Kinabalu at Laban Rata 3200m above sea level , imcoming water temperature 5C, the Microsolars can still heat up the water without electricity to 40C to 50C in cloudy weather, other solar water heaters cannot do that. But max number of pax supported per Microsolar is 8 pax, therefore for two Microsolars 220 litres each at Pendant Hut the max no of pax is 16. The larger Microsolars 330 litres could not be carried up by porters so two units of 220 litres Microsolar was installed. The problem is often there are 30 to 40 pax in the Hut taking showers, plus kitchen usage, but heard some management personnel said do not want to install more Microsolars, they are all rugged climbers, can withstand cold water showers... ... so moral of the story is, if properly planned for the number of pax showers, Microsolar is the best solution for heating water without electricity.

website: microsolarsystem.com
facebook : Microsolar System Water Heaters
email : microsolar@hotmail.com
tel : 03 56373735, 0133625965
The worlds highest temperature solar water heater. no electricity.

220 litres Microsolar RM6,000 with basic install Klang Valley
330 litres Microsolar RM8,000 with basic install Klang Valley

website: www.microsolarsystem.com
facebook: Microsolar System Water Heaters
email: microsolar@hotmail.com
tel : +(603) 56373735, +(6013) 3625965

The world's highest temperature water heaters

MICROSOLAR
website: www.microsolarsystem.com
facebook: Microsolar System Water Heaters
email: microsolar@hotmail.com
tel : +(603) 56373735, +(6013) 3625965, +(6012) 3325965

The world's highest temperature water heaters
Microsolar 120 litres 3 pax RM4,800.00 with basic install Klang Valley
Microsolar 220 litres 6 pax RM6,000.00 with basic install Klang Valley
Microsolar 330 litres 8 pax RM8,000.00 with basic install Klang Valley

MICROSOLAR
website: www.microsolarsystem.com
facebook: Microsolar System Water Heaters
email: microsolar@hotmail.com
tel : +(603) 56373735, +(6013) 3625965, +(6012) 3325965

The world's highest temperature water heaters
Microsolar 120 litres 3 pax RM4,800.00 with basic install Klang Valley
Microsolar 220 litres 6 pax RM6,000.00 with basic install Klang Valley
Microsolar 330 litres 8 pax RM8,000.00 with basic install Klang Valley

Yes do not put any tank whether insulated or not between the Microsolar and the hot water shower, it will only increase the "dead water" heat loss and wastes hot water . Use only half inch hot water piping and insulate it if possible. Plan your piping layouts and Microsolar locations so that the hot water piping between Microsolar and shower head must be as short and as small diameter as possible.

MICROSOLAR
website: www.microsolarsystem.com
facebook: Microsolar System Water Heaters
email: microsolar@hotmail.com
tel : +(603) 56373735, +(6013) 3625965, +(6012) 3325965

The world's highest temperature water heaters
Microsolar 120 litres 3 pax RM4,800.00 with basic install Klang Valley
Microsolar 220 litres 6 pax RM6,000.00 with basic install Klang Valley
Microsolar 330 litres 8 pax RM8,000.00 with basic install Klang Valley