Pete C wrote:
On Dec 24, 3:29�pm, wrote:

According to Wikipedia, coal is about 6.67 kWh/kg.

A lot depends on what sort of coal it is.

Also according to Wikipedia anthracite has an LHV of 33MJ/kg which
gives 9.17kWh/kg.

I doubt Aga owners will be feeding their beast on 'value' brown coal,
more like /Finest/ smokeless or anthracite ))


Welsh dry steam coal mostly, It burns a little easier than anthracite.
Or coke or pre-made coaldust pellets.

Low bitumen content was the key. And low residual rock content to avoid
too much slag.

I'd hate to go back to coal fired anything frankly. Open fires maybe.


cheers,
Pete.