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Understanding Boiler and Megalfow
Comments
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jennifernil wrote: »But if he has Gas CH then the boiler will also heat the water. No electricity involved other than for the pump and boiler controls.
The cylinder will also have an electric immersion heater but that is just for back-up and would normally be turned off.
I think you have more knowledge on this system, but I was thinking that if the OP was out all day, the water in the cylinder would cool down gradually during the day, so the immersion heater would keep switching on/off to maintain a temperature. Using an immersion heatter can be expensive.
The central heating boiler is only heating water, when a hot tap is switched on and it is topping up the water used through the Megafow cylinder.
I would think that this system will be more expensive to run than a combi boiler, so the OP may expect higher bills.The comments I post are personal opinion. Always refer to official information sources before relying on internet forums. If you have a problem with any organisation, enter into their official complaints process at the earliest opportunity, as sometimes complaints have to be started within a certain time frame.0 -
You may be correct. The OP was asking about the best way to stop wasting money and I was not sure whether the Megaflow was heating water when it did not need to be. If it is, then I would expect that the electricity bill will be higher than expected. As you say they are apparently well insulated cylinders, so this may not be an issue.
The megaflow isn't heating the water, it's just a hot water cylinder, the boiler is heating the water contained in it.
If you use a lot of hot water during the day leave it turned on, if not set the controls to heat water when you need it.
Our hot water is set for an hour just before we wake up, and another hour prior to us arriving home, we have a large cylinder so unless that works fine for us apart from the weekend when it's set to run all day, that allows us both to have a nice soak in the tub.0 -
The Megaflow the OP has is pretty complicated, involving heat exchangers, I think he needs to read up on it !
http://www.heatraesadia.com/346/
The system my daughter has is a different make, so not identical, only similar. She does have high pressure HW.
She also has a separate immersion heater which she keeps turned off, so that cannot be using any electricity. She is only using gas to heat everything.
It's different from having stored HW.0 -
jennifernil wrote: »The Megaflow the OP has is pretty complicated, involving heat exchangers, I think he needs to read up on it !
http://www.heatraesadia.com/346/
It's different from having stored HW.
It's not different from having stored HW, it's a hot water cylinder that's what it does.0 -
jennifernil wrote: »The Megaflow the OP has is pretty complicated, involving heat exchangers, I think he needs to read up on it !
http://www.heatraesadia.com/346/
The system my daughter has is a different make, so not identical, only similar. She does have high pressure HW.
She also has a separate immersion heater which she keeps turned off, so that cannot be using any electricity. She is only using gas to heat everything.
It's different from having stored HW.
I had read some of that information before making some replies. The Megaflow cylinder is not just a tank for storing hot water. It has two immersion heaters (3kw each) to heat the top and bottom of the tank. From what I could understand, it is designed to maintain the water temperature at a certain level, so you always have hot water pressured enough for decent showers.
Apparently because these cylinders are so well insulated the amount of electricity they use is kept to a minimum, plus the central heating boiler is also adding hot water when taps are switched on, so if water is constantly being used the immersion heaters are not needed. However, if a household is away from the house for long periods with water not being used, then it would be a waste to keep the immersion heater on.The comments I post are personal opinion. Always refer to official information sources before relying on internet forums. If you have a problem with any organisation, enter into their official complaints process at the earliest opportunity, as sometimes complaints have to be started within a certain time frame.0 -
It's not different from having stored HW, it's a hot water cylinder that's what it does.
It is a storage and heater. Like the old copper hot water tanks, but this is pressurised.The comments I post are personal opinion. Always refer to official information sources before relying on internet forums. If you have a problem with any organisation, enter into their official complaints process at the earliest opportunity, as sometimes complaints have to be started within a certain time frame.0 -
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jennifernil wrote: »There seems to be 2 types, direct and indirect.
OP needs to establish which system he has.
The OP has a system boiler, I think it's fairly safe to assume that it's an indirect system
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That would be my assumption too, but huckster is going on about a system that uses 2 immersion heaters.0
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There's quite a good guide here....
http://www.gasapplianceguide.co.uk/Mains_Pressure_Hot_Water_Systems.htm0
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