| Air Conditioning & Refrigeration Concerns - 5 Mingarry - DH3 2JB |
| AQS Air Quality Specialists - 4 Grasmere Avenue West Auckland - DL14 9LX |
| Barkell Ltd - Unit 22 - DH8 6SZ |
| C M C A Ltd - Prospect Road - DL15 8JP |
| Coolertronics Ltd - Polar House - DH6 5PF |
| Domnick Hunter Ltd - Durham Road - DH3 2SF |
| Dunnill Mechanical Services Ltd - 12 Front Street - DH7 7QX |
| Ebac - St Helen Trading Estate - DL14 9AL |
| Elite Heat Ltd - Unit 7B & 8B - DL1 2NS |
| Elite Heat Ltd - Unit 7b & 8b - DL1 2PA |
| L & P Refrigeration & Air Conditioning Ltd - Suite 3 Byron House - SR7 0AA |
| L & P Refrigeration & Air Conditioning Ltd - Suite 3 Byron House - SR7 0HW |
| L & P Refrigeration & Air Conditioning Ltd. - Suite 3 Byron House - SR7 0PW |
| Leybourne Urwin Ltd Cramar House - Tanfield Lea Industrial Estate South - DH9 9QT |
| Ned Air - 10 Fallow Rd - DL5 4SU |
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