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authority will have been notified before the installation of the furnaces
covered by the order and may in some cases have approved plans and speci
fications for them.
5. The conditions of exemption contained in the order are intended to
ensure the proper and smokeless use of the furnace.
Exemption of the Radiation Ltd solid fuel ductair unit and the Fulgora
Ltd. slow combustion stove
6. These two appliances, if properly used, are virtually smokeless and
are also exempted by the order. Here again the conditions of exemption are
designed to ensure proper use.
II. Mechanically Fired Furnaces
installed before 31st December, 1956
7. It is desirable that all coal burning furnaces fired by mechanical
stokers which are capable of working as smokelessly in smoke control areas
as those exempted by the above order, but which were installed before 31st
December, 1956, should be exempted on similar conditions by local authorities
under section 11(3) of the Act.
8. Furnaces fired by mechanical stokers consume efficiently considerable
quantities of coal, particularly small coal which is in plentiful supply
Refusal to give exemption in suitable cases may lead to unnecessary demand for
solid smokeless fuels or may put the owner of the furnace to unjustifiable
conversion expenses
9 Local authorities are, therefore, asked to arrange in proposed smoke
control areas for the inspection of mechanically fired furnaces not exempted
by the order and to consider whether the furnaces are capable of reasonably
smokeless operation when using suitable coal and when properly maintained and
operated The possibility of securing alterations to plant to achieve this
end should be considered.
10 Where in their opinion exemption on suitable conditions is undesirable
they should report the facts to the Minister when submitting the smoke control
order for confirmation.
III. Furnaces fired by pulverised fuel, wood waste,
and large hand fired furnaces
11 Furnaces fired by pulverised fuel are not covered by the Smoke Control
Areas (Exempted Fireplaces) Order, 1959, although frequently they are capable of
almost smokeless operation. Local authorities should consider their exemption
from the operation of smoke control orders in suitable cases, reporting to the
Minister as in paragraph 10 where, in their view, exemption is not desirable
12 Local authorities should also consider the exemption of stoves and
furnaces used for burning wood waste (other than the stove listed in the
exempted Fireplaces Order, 1959), particularly where these are installed on
premises used by furniture manufacturers and other users of wood on a large
scale These stoves and furnaces not only minimise the manufacturer's fuel
costs but also dispose of large quantities of wood waste for which it might
be difficult to make other arrangements. Consideration may have to be given,
however, to the amount of smoke produced from these appliances and in case of
difficulty the firm concerned might be asked to seek advice from the National
Industrial Fuel Efficiency Service or other fuel consultants
13. In some proposed smoke control areas there may be large coal burning
furnaces which are still fired by hand. The exemption granted by the Smoke
Control Areas (Exempted Fireplaces) Orders of 1957 and 1959 now enables the
owners to consider converting them to burn coal with the aid of a mechanical
stoker or to burn oil"