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DAB Pumps Ltd- Hertfordshire
Manufacturer of canned rotor, in-line, end suction, multi-stage, submersible, rainwater harvesting, firefighting, pressurisation and booster sets.
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Dalair Ltd- West Midlands
Manufacturer of air handling and packaged air conditioning equipment.
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Dalkia- Middlesex
Facilities m&e energy management
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Danfoss Ltd- Buckinghamshire
Manufacturer of motion controls (drives, soft starters).
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Danfoss Randall Ltd- Bedfordshire
Danfoss Randall is one of the leading manufacturers of domestic and commercial heating controls.
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Datum Electronics Ltd- Isle of Wight
Manufacturer of electrical assembly testers, controllers and strain/load indicators/sensors. torque transducers.
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Dawmec Ltd- Hampshire
UK distributor of Copeland compressors and condensing units, ALCO controls and Control Techniques variable speed drives.
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Dean & Wood Ltd- West Yorkshire
Refrigeration and Air Conditioning wholesaler
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Decca Plastics Ltd- Lancashire
Manufacturer of GRP one-piece and sectional cold water tanks.
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Delavan Ltd- Cheshire
Manufacturer of industrial nozzles and accessories and complete fluid systems.
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De'Longhi Ltd- Hampshire
Fixed and mobile air conditioning, heating and dehumidifying equipment manufacturer.
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Denhaco Ltd- Buckinghamshire
Supplier of BS ecoflange systems and ancillary ductwork supplies.
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Detek Systems Ltd- Hertfordshire
Supplier and installer of electronic water leakage trace heating.
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DG Controls Ltd- Derbyshire
Manufacturer of beacon lamps, stacking and tower beacons and LED indicators.
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Dimplex- Hampshire
Manufacturer of solar thermal hot water, heat pumps, air curtains, hot water storage and electric heating.
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Doby Verrolec- County Durham
Manufacturer of ductwork components, cold-rolled profiles and roller shutter door profiles.
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Douglas Delabie Ltd- Oxfordshire
Supplier of Thermostatic Mixing Valves and water control products for commercial applications
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Drugasar Ltd
Supplier of gas-fired balanced flue industrial and designer fires.
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Ductclean (UK) Ltd- Hertfordshire
Removal of asbestos and the cleaning and maintaining of ventilation systems
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Ductmann Ltd- West Midlands
Spiral tube and rectangular ductwork manufacturer.
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Ductwork Projects Ltd- Dorset
Manufacturer and installer of kitchen ventilation canopies/ventilation systems.
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Dufaylite Developments Ltd- Cambridgeshire
Manufacturer of intumescent air transfer grilles, pipe collars and other products for maintaining fire compartmentation.
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Dunham-Bush Ltd- Hampshire
Manufacturer of heating, air conditioning and refrigeration equipment.
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Dunphy Combustion Ltd- Lancashire
Manufacturer of single and multifuel combustion equipment and contractor for turnkey, installation and maintenance services
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Durapipe UK- Staffordshire
Manufacturers of plastic pipework systems.
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Durotan Ltd- Buckinghamshire
Supplier and installer of pre-insulated pipes
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