Yes, those on the TV were called Hotpods, made with gas bottles and scrap VW parts, very nice little units. sold for well over a grand each........
But, about the same size as Tusses and probably similar outputs of around 4 to 6 KW tops which means a nominal output ( average operating output) of around 2 0r 3 KW.
If you cannot envisage KW as heat output the consider that 40,000BTU is about 11.5 KW.
The space I have to heat is around 7,200 cubic feet so models of this size would be too small to make any difference unless you were right next to them.
The bottle I intend to use is the larger 47 kilo one so hopefully this will give a greater output but even then only one section ( an enclosed area under a mezzanine floor area about 1200 foot cubed) will be warmed, the rest of the workshop will just be aired with the chill off.
Thats fine because I want most of the heat where I sit at the desk or just stand, pillar drill, wetstone sharpener, grindstone etc, I will not need as much heat out where the tablesaw, PT, morticer etc are.
I will use coal as well as offcuts and shaving so it will have a proper firegrate whereas wood burners work best with a solid bed of sand or even ash.
I have sussed out how 'airwash' works so the glass door I put in will keep clean and I have a way to rig up ;cleanburn with a secondary heated air input that ensures minimum smoke and tar and ramps up the heat from any given amount of material. Cleanburn simply second combusts the very high temp flue gas with the extra prehested oxygen feed above the normal combustion area
For this to work the stove must be airtight so that intakes, valves dampers etc are the only access for air in and exhaust out, if there are gaps, say around the door then the combustion is not controllable and thats when you only get 30 minute burns , high fuel consumption and no overnight burning.
I have looked at lots of stoves and most have little burn control or decent output until you spend £500 or more, and the second hand ones are fetching silly money, hence the attraction of building one.
So I just wondered if anyone has built one with any of these features included, so I might get some tips.