Ease Instant Water Heater

Details

An instant heater for a kitchen sink or a small bathroom, where a storage tank is wasted because the water is used within a minute of being heated. It is also the item on this shelf where we have to correct our own earlier claim in public. This page used to say the 3 litre gives usable hot water in about 55 seconds. The arithmetic does not support it. At 2,980 watts, 55 seconds puts roughly 152 kilojoules into 3 litres, which lifts them about 12 degrees. From a 25 C inlet that is 37 C, and 37 C is not hot water. The honest figure is 3 minutes to 65 C, and here is how it is reached: 3 litres raised 40 degrees needs 502 kilojoules, and at 2,980 watts with about 93 percent of the input reaching the water that is 181 seconds. The 6 litre is 6 minutes on the same sum. Conditions are part of the claim, so they are printed too: tank full, inlet 25 C, thermostat 65 C, supply 230 V. The other thing worth knowing before you buy is what this heater does not have. There is no anode rod in it, and there should not be. A sacrificial magnesium anode protects a mild steel tank; this tank is copper, copper does not corrode the way steel does, and an anode fitted here would do nothing except give a brochure a line. The storage heater in this range is glass lined steel and does have one, and there the rod is the single part that decides how long the tank lives.

• Measured input power 2,980 W at 230 V, not a 3,000 W figure asserted on a sticker. The classic cheat in this category is a heater badged 3,000 W that draws 2,400, and the way to settle it is to publish the measurement and the voltage it was taken at
• Element in Incoloy 800 sheath, nominal resistance 17.8 ohms, which is where the 2,980 W comes from at 230 V. A grade and a resistance are a claim; the word element is not
• Tank in electrolytic tough pitch copper, 99.9 percent, 0.6 mm wall, working pressure 6.5 bar, hydrostatically tested at 10 bar to IS 2082
• No anode rod, because a copper tank does not need one, and no anode in the parts list to imply otherwise
• Three protections and all three are stated: a thermostat fixed at 65 C, a manually resettable bimetal thermal cutout, and an 8 bar pressure relief valve which is in the box. A water heater with no relief valve is a pressure vessel with no relief, and that is how they burst
• Class I earthed, with a 3 core 2.5 sq mm flex and a 16 A plug. At 12.96 A a 1.5 sq mm flex is legal and it runs warm, and warm is how a flex ages. The extra copper costs us about Rs 60 and it is not a place to save
• No BEE star on the 3 litre, and none printed. The BEE label for water heaters is a storage heater scheme and it does not reach a heater this small, so a star on a 3 litre instant heater is a star that does not exist. The 6 litre is inside the scheme: 4 star on a standing loss of 0.31 units in 24 hours, which is about Rs 2.50 a day if you leave it switched on doing nothing
• Front cover on four Philips screws with the element, thermostat, cutout and gasket behind it. No clips to snap and no adhesive
• Warranty is 2 years comprehensive on the appliance, 5 years on the copper tank and 3 years on the heating element. Three different scopes, so they are written as three, and none of them is a figure for the others
• Spares are held 7 years, and what makes that real rather than a hope is a spares bank bought with the first production run and tooling held in our name, so the parts can still be made after the maker has moved to another model
• There is no Shuunnya service network. No engineer count, no city count, no turnaround promise, because none of it is built. Until a service route reaches your district a comprehensive claim is settled by replacement or refund
• Installation is not included and is arranged locally at your cost. It needs a wall bracket into solid masonry, half inch BSP inlet and outlet and a 16 A point. Full of water the 3 litre weighs about 6 kg and the 6 litre about 10 kg, so a hollow partition wall needs a proper anchor rather than a plastic plug