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Have an old vintage Park Ray coal stove which I am converting to a wood burner.
I am putting in a direct air feed. Does it have to be the same size as the Flue pipe?
Would a stainless perforated pipe above the fire aid secondary combustion?
Silver knob on the bottom right which moves but I don't know what is controls? Is it an ash shaker or is something rusted? Any ideas?
Secondary combustion air needs to be hot and injected with some velocity at the right spot, so air is normally drawn in low and taken up the back of the firebox to heat, then injected at the top of the firebox.
Direct air? As in outside air kit? Don't think so large, hot air is expanded after all. Think part j says something like 5cm2 area of air brick to a room for each kW if more than 5kw stove, maybe just use that figure for area for every kW.... But how to guess at the kW?
Riddle is quite likely for a coal stove
The closed combustion attachment for my Stove is 3" dia, 5"flue. Modern stoves tho.
Have an old vintage Park Ray coal stove which I am converting to a wood burner.
I've had stoves of both types, so this is just what I've observed / read about them...
Coal burns in tall / thin chambers. Wood in wide & low.
Coal burns with air from underneath. Wood with air from above.
Coal needs a grate for ash to fall away. Wood doesn't, it needs to burn in a bed of ash.
Coal doesn't need much secondary air to burn completely, it needs mainly primary. Wood burns almost entirely on secondary air when its burning right.
Basically, you've got a bulldog and you want to turn it into a greyhound.