Separate heating & hot water...?

Then it occurred to me that, as I said, with a dishwasher and electric shower, I really don't need hot water at all, so why not just turn it off... figured the easiest way to do that was simply turn the pump to the tank off (I have two separate pumps, one for hot water, one for the rads. So I turned it off, and the burner stopped burning...

Turns out I can turn the rad pump off, and the burner/boiler is happy; turn the hot water pump off, and it stops. Unless it's possible for me to get it rewired in some way, guess I'm stuck with constantly heating a tank full of water I don't need...
 
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IT is worth noting sometimes firebird recommend two pumps to get rid of boiler heat don't ask me why I've done a few to their instructions.Bob
 
oilboffin said:
IT is worth noting sometimes firebird recommend two pumps to get rid of boiler heat don't ask me why I've done a few to their instructions.Bob
Click to expand...

Thanks, that's interesting. Well, here's another angle then... is there any other way I can reduce the cost of constantly heating a big tank of water?

I mean, I don't suppose you can get really small tanks or anything!
 
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JohnD said:
what do you think it costs?
Click to expand...

No idea John - it's just a gut thing I suppose, constantly pumping energy into something I don't use.

When I lived in Gloucestershire, where it was MUCH warmer, and my house was new so well insulated, I never had the heating on, but heated the water for about 3/4 hour every morning, and the cost was certainly significant (haven't got the figures here).

Here it's being heated for several hours a day...
 
upload_2017-10-26_18-56-43.png
 
Roger465 said:
No idea John - it's just a gut thing I suppose, constantly pumping energy into something I don't use.

When I lived in Gloucestershire, where it was MUCH warmer, and my house was new so well insulated, I never had the heating on, but heated the water for about 3/4 hour every morning, and the cost was certainly significant (haven't got the figures here).

Here it's being heated for several hours a day...
Click to expand...

You might be interested to know...

in summer when I am using gas to heat the cylinder (no central heating), my average gas usage is
0.75 cu.m/day
8.4 kWh/day
22pence/day
plus VAT and standing charge

This includes showers and some baths, and some washing up. We have a hot-fill washing machine so this cuts electricity costs but increases HW use. The boiler is timed for an hour in the morning and an hour in the evening. Even if it was fully cold it would be hot in about half an hour, after which the thermostat stops the boiler trying to heat it. So yours is actually not being heated for several hours a day, unless for some reason you have chosen to have an uninsulated cylinder and unlagged pipes.

If you were just using HW in the kitchen sink and to wash your hands yours would be less.

Energy from electricity costs about four times as much as energy from gas.

I can't see that your electric shower is a money saver. If you stopped heating your cylinder you would save a matter of pence per day.

Have a look at your summer gas usage records.
 
If you do get an electrician to look at it, depending how difficult the cable run from the airing cupboard is, adding a cylinder thermostat is not complicated and would make for significant savings.
 
JohnD said:
You might be interested to know...

in summer when I am using gas to heat the cylinder (no central heating), my average gas usage is
0.75 cu.m/day
8.4 kWh/day
22pence/day
plus VAT and standing charge

This includes showers and some baths, and some washing up. We have a hot-fill washing machine so this cuts electricity costs but increases HW use. The boiler is timed for an hour in the morning and an hour in the evening. Even if it was fully cold it would be hot in about half an hour, after which the thermostat stops the boiler trying to heat it. So yours is actually not being heated for several hours a day, unless for some reason you have chosen to have an uninsulated cylinder and unlagged pipes.

If you were just using HW in the kitchen sink and to wash your hands yours would be less.

Energy from electricity costs about four times as much as energy from gas.

I can't see that your electric shower is a money saver. If you stopped heating your cylinder you would save a matter of pence per day.

Have a look at your summer gas usage records.
Click to expand...

Ah, if only I had gas... but I'll look at your figures later when I get back home thanks
 
D

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