Tweet
FYI: Primary, secondary and tertiary air
Not all stoves have all of these different air supplies.
Primary air enters below the grate and is usually used only to light the fire, or to rescue a neglected one. On our stove this is the only supply that enters from the room space (the other two supplies are fed from a through-wall duct from the outside).
Secondary air usually enters from a narrow downward pointing slit above the door and keeps the glass clean. Our secondary air is preheated by passing through a metal duct coiled around the firebox to aid this cleaning.
Tertiary air usually enters at the back of the fire - the hottest part - and its job is to ensure complete combustion of any remaining particulates, which are just carbon and will still provide more heat when burnt.
Not all stoves have all of these different air supplies.
Primary air enters below the grate and is usually used only to light the fire, or to rescue a neglected one. On our stove this is the only supply that enters from the room space (the other two supplies are fed from a through-wall duct from the outside).
Secondary air usually enters from a narrow downward pointing slit above the door and keeps the glass clean. Our secondary air is preheated by passing through a metal duct coiled around the firebox to aid this cleaning.
Tertiary air usually enters at the back of the fire - the hottest part - and its job is to ensure complete combustion of any remaining particulates, which are just carbon and will still provide more heat when burnt.
Comment