http://www.woodburningstoves.co.uk/multi-fuel-stoves/charnwood-country-16b-multifuelas weve discussed upon here before about what a system can and cant do what maybe stipulated by registered output manufactorers can minipulate these stats to prove there system is better than the last
https://woodstoves.forumotion.co.uk/t275-non-rocket-stove-fuel-consumptionas quoted other factors are also included this page will explain in more detail with costs and savings
http://www.energysavingtrust.org.uk/Generating-energy/Choosing-a-renewable-technology/Wood-fuelled-heatingthese systems are rated at 19.6kw providing 13.2kW to the water and 6.4kW to the room.
it quotes 10 radiators this setting also depends on how hot you want per room and has other factors that you need to consider
La Nordica Rosa DSA wood burning range cooker
http://www.stovesareus.co.uk/la-nordica-thermo-rosa-dsa-wood-burning-boiler-cooker.html6-8 radiators
79.9% Efficiency
6-8 radiators
http://www.stovesareus.co.uk/all-stoves/boiler-stoves/5-8-radiators.html8-10 radiators
http://www.stovesareus.co.uk/all-stoves/boiler-stoves/8-10-radiators.html10+ radiators
http://www.stovesareus.co.uk/all-stoves/boiler-stoves/10-radiators.htmlold designs ratings 35kw - 40kw
aga, esse and rayburn cookers these systems do heating, hot water, cooking
these are built on rocket design technology but are heavy
the new designs are on the above links and are rated at 300kg weight
http://www.boilerstoves.co.uk/boiler-stoves.aspas you can see its a nightmare to choose one design from many but it comes with factors involved
the other way to check is by switching back from kw to btu
http://www.rapidtables.com/convert/power/kW_to_BTU.htmnew system as shown above
a 13.2kw heating system would provide in btu 45040.2744
45,000 btu
old system aga, esse, rayburn
35kw heating system would provide in btu 119424.97
119,000 btu
as you can see a big difference people forget to factor in other things less insulation add 10%, outside walls another 10% per outside wall
in end the 45,000 btu system is too low to be used yet the higher rating 119,000 is more than adequate in providing more than enough hot water and central heating well over the desired temperature
now we come to the rocket burner how many btus does a rocket burner provide with hot water for hot water and central heatings
well to be honest i havent come across a design that has these calculations as of yet however it dosnt mean that they dont have the power to run them
the new rocket burner cookers have a good rating and the old cookers also have a good rating
any rocket burner kw rating to run hot water is going to be around 9kw but factor in a different warming system different design what was 71% rating climbs higher the higher rating the better
a statement unknown on true factors once water is added to a rocket stove the hightest temp wouldnt be acheived until the water system became hot enough
From what I have found on the Net an 8 inch stove can output about 80000 BTU (23,5 Kw),
Assumed there is a linear relationship of power output and cross-sectional area,
then a 23.5 inch stove would be needed for 200 Kw output.
well worth a read
http://www.bioenergylists.org/stovesdoc/Still/GTZ%20Uganda/gtzuganda.html