On Wed, 18 Dec 2019 13:55:30 +0000, John Rumm
wrote:

snip

So, can anyone recommend it as a solution for this sort of role and
suggest any specific heaters / suppliers please?

IIUC many of the commercial ones you see in shops are actually gas
powered...

Yup. Same principal re the heating though (when gas isn't an option).

Cheers, T i m