Indirect systems
Indirect systems are chiefly used for the continuous heating of a number of rooms or large buildings from one, Centre source, b the name Central Heating, This does not necessarily imply that the heating source is strictly central, indeed it may be at a distance from the building.
This class of system finds its greatest application in large buildings of all types.
The advantages of the indirect systems are:
( a )Fuel and ashes are kept outside the occupied spaces.
( b )Individual tines arc not requiring.
( c )Cleanliness.
( d )Equable temperature maintained in all parts.
The disadvantages are:
( a ) Heat is lost from piping where this is outside the occupied rooms. This loss can be minimized by proper insulation of the pipes.
( b ) Labour is required for stoking and removal of ashes. This applies only with solid fuel and can be greatly reduced with automatic firing.
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Bondar Tamara. English Communication. ANNA MARIE:Центр навчальної літератури, 2004.
Michael Swan. Catherine Walter. How English Works.- Oxford: University Press, 1998.
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