Cavity wall insulation can't be fitted - ASHP issues...

matelodave

When you look at the mess made by a gas explosion in Ayr last week, just think how big it would have been if it was hydrogen rather than natural gas  (think of the Hindenburg) - just saying

Reed_Richards

There is that but it's probably more to do with the fact that hydrogen is a very leaky gas.  So yes, you will get some explosions where it leaks and builds-up, but mostly it will just leak away and vanish.

Verdigris

matelodave said:

When you look at the mess made by a gas explosion in Ayr last week, just think how big it would have been if it was hydrogen rather than natural gas  (think of the Hindenburg) - just saying

Is hydrogen any more explosive than methane? I thought it was the proportions of the gas/air mixture that was critical. Flour is extremely explosive in the right proportion with air.

EricMears

matelodave said:

When you look at the mess made by a gas explosion in Ayr last week, just think how big it would have been if it was hydrogen rather than natural gas  (think of the Hindenburg) - just saying

The Hindenburg held a lot more hydrogen than a normal house supply could deliver quickly.

ABrass

liviboy said:

Thanks everyone for your comments.

To answer a few points, the company that refused to fit the CWI is locally "the company" so when others see on the system (I believe run by the local council) that it was refused by them the others don't even bother coming out to have a look.

External insulation aint happening. I live in an estate and our houses are all brick-fronted. If I lived in a rendered house then perhaps but I just wouldn't like my house looking so vastly different to the others on the street...plus I bought the house specifically because it was brick-facing as opposed to rendered/clad/etc.

Hydrogen I've been told isn't "the solution".

Insulated plasterboard could work but the cost and mess involved will be huge so it'll need to be something done perhaps over a longer period of time.

Thanks everyone for your thoughts.

Brick slips.

EG. https://www.uk.weber/webertherm-xb

coffeehound

Verdigris said:

matelodave said:

When you look at the mess made by a gas explosion in Ayr last week, just think how big it would have been if it was hydrogen rather than natural gas  (think of the Hindenburg) - just saying

Is hydrogen any more explosive than methane? I thought it was the proportions of the gas/air mixture that was critical. Flour is extremely explosive in the right proportion with air.

By volume, hydrogen is less energy-dense than the other fuel gases: 10,050 kJ per cubic metre compared with methane  32,560.  Hydrogen is a lot more easily ignited though, so static sparks become more of a potential hazard (again, see Hindenburg)

ETA, yes you are right about H2 being move explosive, apparently

on an equal mass basis, hydrogen gas explosions are more destructive and carry further. However, the duration of a conflagration tends to be inversely proportional to the combustive energy, so that hydrogen fires subside much more quickly than hydrocarbon fires.