Switching from unvented system to combi boiler

Snuggles

Thanks for the input all, so difficult to make the right decision when there are so many unknowns about the future, and we don't want to make an expensive mistake. I think on balance I'm minded to keep the HW cylinder - maybe OH will be persuaded when the quotes come in, as it should be substantially cheaper to simply swap the boiler. 

Bendy_House

Section62 said:

The BiB applies to all gas boilers, so shouldn't really be listed as a 'pro' for a combi in the system vs combi decision making process. Do'h! Of course.

I'd also be less optimistic than you about H2 becoming a major energy source.  The most efficient way of producing it will be through electrolysis, which of course needs electricity. 

Yes, and there are delivery issues too, since it's a much 'thinner' gas - the potential losses through our leaky pipes are significant.

Hard to know which solutions will turn out to be the most efficient and effective. Producing H2 using leccy is a form of energy storage, and the idea would be to divert any surplus generation to its production - overnight, for example. It also could be used where there's large renewable generation systems - wind and PV - in more isolated areas that don't have a strong enough grid connection to supply the leccy directly - small islands, for example. There, the wind turbines could be set up to almost exclusively produce Hydrogen.

But, who knows.

BUFF

Bendy_House said:

It also could be used where there's large renewable generation systems - wind and PV - in more isolated areas that don't have a strong enough grid connection to supply the leccy directly - small islands, for example. There, the wind turbines could be set up to almost exclusively produce Hydrogen.

But, who knows.

Orkney & Shetland both have major plans for Hydrogen production.

Eldi_Dos

BUFF said:

Bendy_House said:

It also could be used where there's large renewable generation systems - wind and PV - in more isolated areas that don't have a strong enough grid connection to supply the leccy directly - small islands, for example. There, the wind turbines could be set up to almost exclusively produce Hydrogen.

But, who knows.

Orkney & Shetland both have major plans for Hydrogen production.

H100 Fife is worth looking up, aims to be first in the world