Make sure you get a decent moisture meter to check moisture levels in wood before burning, I can recomend euro heat as a manufacturer of wood burning appliances( including biomass ) Al C

if you need to stack wood against something use an old pallet, they allow ventilation, and after a few years can be replaced.

as if by magic, disco3 brings up a topic on Eco fans I mentioned earlier in the thread

http://www.disco3.co.uk/forum/post1156114.html#1156114 Former Mod/Member, with the most post & Chicken George Arch nemesis