Hi I have a megaflo dd210 immersion heater in an all electric property. As this is for hot water is it better or more economical to leave this on 24/7 or just an hour or so a day ? Many thanks Mark.
1. The Megaflo 210DD is a directly heated unvented hot water cylinder.
2. It is fitted with 2 x 3kW immersion heaters.
3. The lower immersion heater should ideally be connected to a cheap rate electric tariff and left to charge during the times that tariff is available. Usually 11 pm to 5 am or thereabouts. This immersion heater heats the entire tank of water.
4. The upper immersion heater is there to "boost" the hot water supply if the whole tank supply is insufficient. It heats only the top third of the tank, around 70 litres.
5. If the cylinder is fully heated, the electricity turned off, and no water drawn, the cylinder loses heat at just under 2 kWh per 24 hours. So about 60 to 70 pence per day.
6. Economy depends on usage pattern:
6.1 If you use very little hot water and have a cheap rate tariff best to leave the lower immersion on throughout the cheap rate period. Once up to temperature, a thermostat switches the power off.
6.2 If you use very little hot water and don't have a cheap rate tariff, you may well be better off running the top immersion once or twice a day. Should take around an hour to heat the top third of the cylinder form cold.
6.3 If you use a lot of hot water you will probably be better off to run the lower heater. If you don't have a cheap rate tariff, look at getting one, but it may mean some re-wiring.
Hi it seems that only the lower heater has a connection. We don't have a cheaper tariff, just switch on for an hour or so when needed. Just thought being on all the time might have been more economical. Would there be a reset button somewhere, there is only one wire from the immersion switch to the tank ( lower ) and can't see any other connection box. Thanks Mark
Just thought being on all the time might have been more economical. Would there be a reset button somewhere, there is only one wire from the immersion switch to the tank ( lower ) and can't see any other connection box. Thanks Mark
It's never more economical to have it on all the time, the hotter it is, the more heat it can lose through the insulation - it might be more convenient for you, if it is left on 24/7 though.
Just seems as though the water isn't as hot as normal, reading the instruction manual it shows reset buttons that need to be pressed if the tank overheats, was just wondering if that was the case, but can't see any reset button anywhere . Thanks Mark.
Just seems as though the water isn't as hot as normal, reading the instruction manual it shows reset buttons that need to be pressed if the tank overheats, was just wondering if that was the case, but can't see any reset button anywhere . Thanks Mark.
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