On 21/01/2015 07:25, harryagain wrote:
"Dennis@home" wrote in message
web.com...
On 20/01/2015 16:34, harryagain wrote:
"Dave Liquorice" wrote in message
ll.co.uk...
On Tue, 20 Jan 2015 09:18:19 -0000, harryagain wrote:

The big debate with hot water storage vessels in Summer is "Is it
cheaper to turn on the CH or use an immersion heater?"

Why would one turn on the CH to heat the HW? Something very wrong
with the control system if you have to do that.

Costs? Gas 5p/unit 80% effcient = 6.25p lecky is 10p/unit or more...

The debate is about heating a boiler, water and pipework (plus losses
from
pipework) up from cold to get a bit of hot water as compared with just
heating the water in the HW store with the immersion heater.

If the boiler is already running for heating the house then obviously
it's
cheaper to use it.
But in Summer the economics are questionable.



No. The debate is whether the solar panel will heat the water up before
the CH boiler cuts in.
Gas is cheaper than electricity even in summer.

The OP never mentions solar panels SFB.
Gas hot water systems are less efficient than electricity. only the cheaper
price of gas makes them viable.



They also generate less CO2, there are no transmission loses and the
thermal efficiency is higher.
Its only the tax on others that makes solar panels viable.

How much wood have you burnt in the last week? Using lots to get the RHI
payment up?