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A.O. Smith storage water heaters · distributed by MEX

Shower last, still just as hot

An ordinary weekday morning: the first one is done, the second starts hoping, the third gives in to a cold shower. A storage tank heats the water overnight, so everyone gets the same. Nobody has to hope.

If your household waits for the water to warm up, you know

The first one showers in comfort, the second gets a cold shock, and on a rushed morning it is a gamble… so we picked tanks that heat ahead and keep it hot on tap A household that showers together should get the same warm water.

150 Years of Innovation
A.O. Smith · founded 1874 in Milwaukee, Wisconsin, USA

The world has trusted A.O. Smith with its hot water for over 150 years

An American leader in water heating and water treatment, in the water business since 1874 and today selling in more than 60 countries, for homes and for buildings alike.

Innovation has a name.

1874Founded
in Milwaukee, USA
60+Countries it sells in
and distributes through
9Countries with operations
and manufacturing plants
11,500Employees worldwide
listed as NYSE: AOS
A.O. Smith manufacturing in the United States A.O. Smith · founded 1874
American public company · NYSE: AOS

150 years on nothing but water

A.O. Smith was founded in 1874 in Milwaukee, Wisconsin, and still keeps its head office in the same city today. The company runs two lines of business, water heating and water treatment, with operations and manufacturing plants in nine countries, and trades on the New York Stock Exchange under the symbol AOS.

United States Canada Mexico Netherlands United Kingdom China India Bangladesh Sri Lanka

Nine countries with operations and manufacturing plants

In Thailand, A.O. Smith is distributed and serviced by MEX through service centres nationwide.

Start with these four

A.O. Smith EES-40 storage water heater, floor standing, 150 litres
Floor standing · 150 litres
A.O. Smith storage water heater, model EES-40
EES-40 · 150 litre tank · 3,800 W · 220V 50Hz 17.27 A · Double Heating Element · rated to 8 bar · 3/4 inch top inlet · 25-66 °C · floor standing, vertical · Ø 53.0 x 111.5 cm high
฿34,500 ฿42,900
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A.O. Smith MEV-100 storage water heater, wall mounted vertical, 90 litres
Wall mounted, vertical · 90 litres
A.O. Smith storage water heater, model MEV-100
MEV-100 · 90 litre tank · 2,500 W · 220V 50Hz 11.36 A · rated to 8 bar · 1/2 inch bottom inlet · 25-75 °C · wall mounted, vertical · Ø 42.5 x 94.5 cm high
฿19,900 ฿24,900
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A.O. Smith ELJH-50 storage water heater, wall mounted horizontal, 50 litres
Wall mounted, horizontal · 50 litres
A.O. Smith storage water heater, model ELJH-50
ELJH-50 · 50 litre tank · 2,000 W · 220V 50Hz 9.09 A · rated to 8 bar · 1/2 inch bottom inlet · 25-75 °C · wall mounted, horizontal · Ø 36.0 x 83.5 cm long
฿13,900 ฿18,500
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A.O. Smith MINIBOT 3L storage water heater, 3 litre capacity
Smallest in the range · 3 litres
A.O. Smith storage water heater, model MINIBOT 3L
MINIBOT 3L · 3 litre tank · 4,500 W · 230V 50Hz 19.56 A · rated to 8 bar · 1/2 inch bottom inlet · wall mounted, vertical · 31.7 x 23.6 x 22.8 cm · Incoloy element · 2 mm thick tank
฿7,900 ฿11,900
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3-5 years
life of an ordinary tank with no glass lining
Blue Diamond = an A.O. Smith patent
Lining on the tank and the element

Blue Diamond glass lining, a tank that lasts 10 years

The tank and the heating element are both coated in Blue Diamond Glass Lining, a glass coating A.O. Smith patented itself. The catalogue states it protects the tank from corrosion and cuts scale build-up, extending working life to 10 years and beyond, while an ordinary tank with no glass lining lasts only 3 to 5 years.

Tank and element both coatedLess scale build-upOrdinary tanks last 3-5 years
5 degrees
temperature lost after six hours
Twin element = 150 litres and up
Heat once, hold it all morning

Six hours of hot water, five degrees lost

The catalogue states the tank holds water temperature steady for up to six hours, losing only five degrees, thanks to an injected Polyurethane Foam insulation A.O. Smith formulates itself. The Double Heating Element alternates two elements to heat faster and save on power over time, and the catalogue states it is fitted only to tanks of 150 litres and above.

Polyurethane Foam insulationTwo elements, alternatingRated to 8 bar
87 degrees
where the thermo cut-out trips on MEV
Anode rod = refillable screw-on
Scale and safety

An anode rod for scale, a cut-out for heat

The anode rod catches scale and stands up to hard water, protecting the tank and extending its life. The catalogue describes it as a micro-porous tube with anodic pellet filling and a refillable screw-on fitting. The thermo cut-out shuts the unit down the moment water runs abnormally hot, set differently per series: EES at 74-80 degrees, MEV at 87, ELJH at 85-90.

An anode rod for hard waterEES trips at 74-80 degreesELJH trips at 85-90 degrees

All products

Every tank size, every budget – take your pick

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Frequently asked questions

How is a storage heater different from an instant water heater
The difference is heating ahead versus heating on demand. An instant heater warms the water as it flows through. A storage heater heats a tankful in advance, so you get hot water the moment you open the tap, until the tank runs down. The catalogue states the tank holds temperature steady for up to six hours, losing only five degrees, and every model is rated to 8 bar, which suits high-rise buildings. Everything in this category is A.O. Smith from the United States, distributed and serviced by MEX.
What are the four series and how do they differ
There are four series, ten models, split by shape and how they mount. MINIBOT 3L is a 3 litre vertical wall unit at 4,500 watts, THB 7,900.-. ELJH mounts horizontally on the wall in 40, 50, 80 and 100 litres, all at 2,000 watts, THB 12,900 to 18,900.-. MEV mounts vertically, with MEV-50 at 45 litres for THB 16,900.- and MEV-100 at 90 litres. EES is floor standing at 150, 190 and 455 litres, THB 34,500 to 67,900.-. The catalogue prints no price for MEV-100, so ask sales.
What do I need in place before installing
Three things: where it mounts, the pipework, and the supply. MEV and MINIBOT 3L mount vertically on the wall, ELJH mounts horizontally, and EES stands on the floor. On pipework, MEV, ELJH and MINIBOT take a 1/2 inch connection at the bottom, while EES takes 3/4 inch on top. On the supply, ELJH and MEV draw 9.09 to 11.36 amps, MINIBOT 3L runs on 230 volts at 19.56 amps, and EES draws 17.27 to 27.27 amps. The catalogue shows example installation drawings, but have an installer look at the site first. Call 02-493-6565.
How long is the warranty, and what maintenance does it need
The A.O. Smith features page in the catalogue states a two year product warranty. The tank and element carry Blue Diamond Glass Lining, which the catalogue says extends working life to 10 years and beyond, and a refillable anode rod catches scale, which is the part an engineer should check on a service round. On safety, a thermo cut-out shuts the unit down the moment water runs abnormally hot. If something is wrong, do not open it yourself. MEX has service centres nationwide on 02-493-6565.

Tell us how many people share the hot water
MEX takes it from there

A.O. Smith of the United States, distributed and serviced by MEX, with a two year product warranty. Service centres nationwide, call 02-493-6565

MEX SWITCH ON THE GOOD TIMES

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