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(a) Any furnace served by a chimney other than a chimney the construction
of which was begun or the plans for which were passed before
the commencement of this section.
(b) Any furnace the combustion space of which has been increased
since the commencement of this section; and
(c) Any furnace the installation of which was begun after the
commencement of this section and which replaces a furnace which
had a smaller combustion space.
The class of furnaces referred to are as follows:-
(a) Burn pulverised fuel.
(b) Burn at a rate of 100 lbs. or more an hour any other solid
matter; or
(c) Burn at a rate equivalent to 1½ million or more British Thermal
Units an hour, any liquid or gaseous matter,
However, there are many furnaces which do not come within the categories
as described that serve existing chimneys which are too low. It is hoped
that the legislation will be amended to include the replacement of these
furnaces so as not to perpetuate the discharge of flue gases at comparatively
low level.
Many new gas-fired furnaces are now being installed. The existing Government
Memorandum on chimney heights is only applicable to plant burning
oil or solid fuel which contain small but appreciable amounts of sulphur.
Gas contains nil or negligible amounts of sulphur and the criteria for
calculating chimney heights based on the sulphur content of fuel are not
applicable to the present Memorandum,
It is hoped, therefore, that the Working Party set up by the Minister of
Technology will soon be in a position to make recommendations on the
heights of chimneys serving gas-fired furnaces
Clean Air Acta 1956
Notification to Instal New Furnaces - Section 3(3)
Oil-fired furnaces 6
Gas-fired furnaces 14
20
Application for Prior Approval to the Installation of New Furnaces
Sec.3.(2)
Applications received 5
Applications approved 5
Clean Air Act, 1968
Application for Approval of Chimney Height - Sec.6.
Applications received 4
Applications approved 4
Inspection and Supervision of Food
Premises
During the year 2846 inspections were made at food premises, stalls and
markets and at 74 of these, conditions contravening the Food Hygiene
(General) Regulations were found.
B.23