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3. Principle
The Dovre model is designed to provide a fireplace convection system without the
need to construct a masonry convection chamber. The principle of operation is
that the cooler air from the lower part of the room is drawn under the base of the
inner cast iron unit. Warm air is produced from the inner cast iron surfaces of the
appliance and this warm air develops between the surfaces of the steel convection
case and the outer surfaces of the cast iron combustion chamber. Flexible piping
may be used to carry the warm air from the appliance to outlet grills to be located
where heat is required. This can be either in the same room as the appliance or in
other rooms even at first floor level. It is essential to ensure that the warm air
flexible pipes are allowed to rise from the appliance.
The cooler room air entering the lower level moves the warm air by convection,
and fan assistance whilst the fans are operating, to be discharged into the room
through the space at the top of the appliance or via flexible pipework.
1. Primary combustion air
2. Secondary combustion air
3. Cool air for convection
4. Convected warm air
5. Twin power fans for boosting convection
6. Passage of combustion air
7. Removable ashpan
8. Rear protection plate
9. Passage of flue gases
10. Outer convectioncasing
11. Clapet