Guidance on the Control of Odour and Noise from ... - Defra

Metropolitan General advice 1 m above ridge
height of any
building within
15 m, no cowl
allowed.
89
On going problem improvements included:
• Stack height raised to 1m above roof eaves;
• Use of pre-filters;
• Use of two carbon filters; and
• Detailed maintenance schedule.
Most problems occur where stack height is too
short and discharge is restricted by mushroom
cowl.
Review cooking operation e.g. change fat more
frequently.
No restriction permitted, allowed to use
American cowl.
If problem remains then filtration required:
• Fabric filter;
• Fabric filter and charcoal filter;
• Fabric filter, charcoal filter and ESP; or
• Fabric filter, charcoal filter, ESP and odour
neutralising agent (this can cause a
problem in itself).
Need to rate fan to meet demand of back
pressure.
Urban – various General advice Local guidance note giving recommended
construction and equipment etc. for A3s.
Urban General
information
gathering
Metropolitan –
various
Local guidelines on information to be submitted
as part of planning application for A3.
General advice Local guidance note giving recommended
construction and equipment etc. for A3s.
Rural - various General advice Local guidance note giving recommended
construction and equipment etc. for A3s.