Begg Cousland Pollution Control - Design and manufacture of filtration and pollution control equipment.

Bromley Instruments - Manufactures equipment for monitoring and recording boiler flue stack emission.

Glosfume - Manufacturing high and low temperature reverse jet air filtration systems for industrial pollution control applications.

R.W. Vesey Ltd. - Air pollution consultants and contractors.

CES Environmental Instruments Ltd - Specialists in environmental and emissions monitoring.

UK Air Testing - Specializes in the testing of a domestic dwelling and large extensions under the new Part L1A Building Regulations, throughout the UK.

Horizon International - Manufacturers of industrial pollution control equipment, dust and fume extraction, electrostatic air filters, mechanical ventilation, and factory/warehouse radiant heating systems