I have a Megaflow DD300HE unvented hot water cylinder.
It is connect to a three-position switch (off, normal, boost):
The property is electric only (no gas), and the electricity is charged at a flat rate. We have been recommended to leave the cylinder constantly set to ‘normal’, as, in theory, the amount of heat loss from the system should be very low, so you effectively have 300 litres of hot water ready to use at any point. When the water is used, cold water goes in and is heated up. However, we have pretty big electricity bills (average £215 per month), and some part of that seems to be heating water. I have noted I can switch the cylinder off for a day and still have hot water the next day.
I was considering replacing the three-way switch with a timer switch, so the unit basically defaults to ‘off’, goes onto ‘normal’ for a couple of hours early morning, and the ‘boost’ functionality (which we have never used so far) would just be there as an option should we not have enough hot water one day.
But of course, I am always seeing what smart options there are. So I wondered if anyone knew of a smart switch I can install? The perfect switch would:
- Allow me to set on/off times via an app
- Allow me to ‘boost’ via an app
- Allow me to ‘boost’ via a button on the switch itself
Any thoughts, inputs, suggestions, etc would be very much welcomed!