Bioethanol fireplaces / stoves

All this talk of heaters seems to have morphed into heating houses. It fascinates me, being old to have seen house heating here in West Oz change over the years. First wood fires, now unloved due to smoke pollution, then oil heaters, great but out when oil prices went up. Then gas even better when our city system went to natural gas from gas fields in north. State government required a portion of natural gas be reserved for domestic industrial use so price has stayed stable despite gas being exported as LNG and so value souring. Now national government are muttering about getting rid of gas heating and cooking to meet standards for green house gas emissions. Opting for electricity heating and cooking. Mean while electricity company (government owned) do prices based on time of day. (off peak) However cheapest is 9am to 3 PM most expensive is 3 PM to 9Pm medium price is 9Pm to 9AM. This reflects the fact that something like half houses have solar PV panels that give an abundance of power in sunshine day time. So I think the future will be for storage electric hot water and then used for house heating heated during the day and battery supported power for cooking in evening.
Sorry no relevance to boat heating. I do like the design of stove top heater. I wonder why he did not use an aluminium sauce pan as base pot or added baffles across it inside in ali to get more heat out of flame to pot. Or even rivet fins on base pot to carry heat into atmosphere. Pot could be painted black to improve radiation. Then I wonder about efficiency of 1inch tube to take away gas exhaust. I would think perhaps larger with a tiny computer 12v fan to aid exhaust. But then I have no experience. ol'will
 
If you go to Patagonia, and I assume other high latitudes, yachts invariably have chimneys. However these are mostly, or exclusively?, for heating the yacht when at anchor (so not at sea) as the chimneys would mostly obstruct sail handling.

Jonathan
 
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