Odour control and dispersal height requirements

If odours cannot be reduced by means of discharge to 1m above ridge or 1m above eaves height and additional odour abatement technology, or if the extraction duct cannot be installed without significant detriment to visual amenity, planning permission may be refused. It may be possible, however, to demonstrate that additional odour abatement technology is available and can be installed to provide a very high level of odour control making a lower dispersal height acceptable. Where possible, however, a lower dispersal height should be avoided.