Flint

Hi guys. I have a question about the above woodburner type. Despite much searching on the internet I've been unable to find out if it is necessary to clean out the airwash system periodically as I've found the vents above the door are pretty caked up with soot. Do the air passages within the stove get filled with ash too? If so how to clean them? I'd probably be able to answer the question myself if I knew the internal design/architecture of the airwash system - ie where the passages are and how they're formed but there seems to be no info available. Anyone with internal experience of these things able to explain please?

I'm a retiree who 8 years ago rebuilt the family home bought by my grandfather in 1929, an unheatable 4 bed flint and brick mid Victorian pile with just an aga and a fire in the lounge. Now its fully insulated, underfloor heating up and down and warm as toast. Never touched a building before that!