THERMOROSSI BOSKY 25, Installation, User & Service Manual

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If wood is burned at low temperature then very little is achieved and incomplete combustion occurs.
Incomplete combustion is typified by wood tar deposits all over the internals of the firebox, flue ways
and door glass.
The lower the combustion chamber temperature, the worse the combustion and the greater the build
up of wood tar.
In really bad cases, wood tar can drip from the appliance.

GOOD wood burning technique increases the efficiency of the burn process.

BAD wood burning technique decreases the efficiency of the burn process.

GOOD wood burning technique decreases your running costs.

BAD wood burning technique increases your running costs.

GOOD wood burning technique increases the life expectancy of the boiler.

BAD wood burning technique decreases the life expectancy of the boiler.

GOOD wood burning technique results in a clean appliance and chimney.

BAD wood burning technique results in a tar covered appliance and chimney.

Below is an example of tar build up that caused excessive damage when the chimney
caught fire
– totally preventable
!
loading and running the appliance
The fire is ignited in the usual way and air is automatically admitted through the air inlet flap controlled
by the relevant setting of the thermostat knob.
When the fire is established, build it up slowly by adding a small quantity of wood, take care not to put
too much wood on at once otherwise this will;
Kill the fire.
Reduce the firebox temperature.
Create smoke.
Cause tarring.