Oil Boiler Isolation Switch.

Hot water heated at point of use is a better solution. Like this, the old Ascot gas water heaters...

https://www.gracesguide.co.uk/Ascot_Gas_Water_Heaters


It must be more efficient to heat water where it is used, either by gas or electricity. In the installation that I have worked on the kitchen hot tap is about 15 metres away from the outside combi oil boiler.


The disadvantages are:


1. A time delay in receiving hot water at the kitchen tap.


2. Heat losses in the copper pipes from boiler to sink tap.


3. Waste of cool water at the sink before hot water comes through.


etc.


Instantaneous water heaters sited at point of use are much more efficient. Advantages.


1. Virtually instant hot water.


2. Very low heat losses due to a short run of water.


3. Virtually no waste of water as the hot water is available after a very short duration. And no stored hot water saves on heat losses as well.


Z.

Hot water heated at point of use is a better solution. Like this, the old Ascot gas water heaters...

https://www.gracesguide.co.uk/Ascot_Gas_Water_Heaters


It must be more efficient to heat water where it is used, either by gas or electricity. In the installation that I have worked on the kitchen hot tap is about 15 metres away from the outside combi oil boiler.


The disadvantages are:


1. A time delay in receiving hot water at the kitchen tap.


2. Heat losses in the copper pipes from boiler to sink tap.


3. Waste of cool water at the sink before hot water comes through.


etc.


Instantaneous water heaters sited at point of use are much more efficient. Advantages.


1. Virtually instant hot water.


2. Very low heat losses due to a short run of water.


3. Virtually no waste of water as the hot water is available after a very short duration. And no stored hot water saves on heat losses as well.


Z.