Crispin,
Although it may not be the 'standard' a fan powered TLUD or others
could have the fan only applied to the secondary air with natural
bouancy supplying primary air. This would work for pellets and fuels
more porous than rice hulls. With the right configuration there would be
no ash entrainment to speak of.
Alex
On 14/06/2013 5:37 PM, Crispin Pemberton-Pigott wrote:
Dear Kevin
I think it is pretty obvious that a fan-powered stove will loft a lot
more small particles than a natural draft version. They can easily be
blown up through the fuel bed. If it is chimney-type ND stove then it
is not such an issue.
Regards
Crispin
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