• A Avi Jacob
  36 Grimsdyke Road, PINNER, Middlesex, HA5 4PW
• A C Direct
  Stable Yard 65 Albert Road, South Woodford, LONDON, Greater London, E18 1LE
• A C R
  Combe Road, WATFORD, Hertfordshire, WD18 6LD
• A L Lo Installations
  50-54 Farnham Road, ILFORD, Essex, IG3 8QD
• Accc Air Conditioning
  Howard Close Business Park, WALTHAM ABBEY, Essex, EN9 1XB
• Active Air
  22 Pettsgrove Avenue, WEMBLEY, Middlesex, HA0 3AF
• Adcock Refrigeration & Air Conditioning Ltd
  10 Brownfields, WELWYN GARDEN CITY, Hertfordshire, AL7 1AN
• Aim Mechanical Services Ltd
  2 Veridion Way, Suite 23 Veridion Park, ERITH, Kent, DA18 4AL
• Air Conditioning Contracts Ltd
  Section A Building, 248 Elgin CR, London Heathrow Airport, HOUNSLOW, Middlesex, TW6 2RX
• Air Conditioning Technologies Ltd
  4 Winds End Close, HEMEL HEMPSTEAD, Hertfordshire, HP2 5LN
• Air Ref Ltd
  1 Minories, LONDON, Greater London, EC3N 1BJ
• Air Systems Design
  697 High Road, ILFORD, Essex, IG3 8RH
• Air-Con-Duct Ltd
  Bridge Works, Iver Lane, UXBRIDGE, Middlesex, UB8 2JG
• Aircair Ltd
  17-18 Brook La Business Centre, Brook La North, BRENTFORD, Middlesex, TW8 0PP
• Aircon Doc
  51 Cunningham Avenue, ENFIELD, Middlesex, EN3 6LB
• Aircon Installations Ltd
  132 Morton Way, LONDON, Greater London, N14 7AL
• Aireserv
  Unit 19 Park Royal Business Centre, 9-17 Park Royal Road, LONDON, Greater London, NW10 7LQ
• Airtech Ltd
  47 Paul Street, LONDON, Greater London, EC2A 4LP
• Airtemps Maintenance Ltd
  Brent House, 214 Kenton Road, HARROW, Middlesex, HA3 8BT
• All Cool Air Conditioning Services
  66 Yukon Road, BROXBOURNE, Hertfordshire, EN10 6FN
• Allcold Refrigeration & Airconditioning Ltd
  28-29 Eastman Road, LONDON, Greater London, W3 7YG
• Alpha Air Conditioning UK Ltd
  61 Blakemere Road, WELWYN GARDEN CITY, Hertfordshire, AL8 7PQ
• Alphacool Refrigeration
  12 Wood Dene, LONDON, Greater London, SE15 2EW
• Apex Commercial Refrigeration & Air Condition
  6 Greenwich Centre Business Park, 53 Norman Road, LONDON, Greater London, SE10 9QF
• Apex Cooling Services Ltd
  124 High Street, Redbourn, ST ALBANS, Hertfordshire, AL3 7BD
• Appliance Breakdown Service Ltd
  1 Pages Close, BISHOP'S STORTFORD, Hertfordshire, CM23 4HP
• Arctic Building Services Ltd
  138 Gallants Farm Road, East Barnet, BARNET, Hertfordshire, EN4 8EL
• Artic Air Conditioning
  3 Longhill Road, LONDON, Greater London, SE6 1TU
• Artic Services
  4 Richmond Road, LONDON, Greater London, E11 4BA
• Artisan Services Ltd
  Unit 3 Brooklands Approach, ROMFORD, Essex, RM1 1DX
• Artisan, Air-Conditioning And, Refrigeration Service Ltd
  Unit 3 Brooklands Approach, ROMFORD, Essex, RM1 1DX
• Askool
  62 Yeading Lane, HAYES, Middlesex, UB4 0EX
• Avi Jacob
  36 Grimsdyke Road, PINNER, Middlesex, HA5 4PW
• B&N Refrigeration & Airconditioning Ltd
  28 St.Thomas Drive, PINNER, Middlesex, HA5 4SS
• Balticare Ltd
  Waters Meet, Willow Avenue, Denham, UXBRIDGE, Middlesex, UB9 4AF
• Birdsall Services Ltd
  6 Frogmore Road, HEMEL HEMPSTEAD, Hertfordshire, HP3 9RW
• Boatman Air-Conditioning
  Unit 1a Abbey Trading Estate, Bell Green Lane, LONDON, Greater London, SE26 5TW
• Bonair Ltd
  367a Upper Richmond Road, LONDON, Greater London, SW15 5QJ
• Boonbest Ltd
  43 Park Lane, BROXBOURNE, Hertfordshire, EN10 7NG
• Brifrost Engineering
  9 The Drive, Wheathampstead, ST ALBANS, Hertfordshire, AL4 8LE
• C Johnson & Partners
  121 Park Road, LONDON, Greater London, W4 3EX
• Cevac & Co.
  4 Marechal Niel Parade, Main Road, SIDCUP, Kent, DA14 6QF
• Chilly Pepper Hire
  Nightingale House, 1 Fulham High Street, LONDON, Greater London, SW6 3JH
• City Engineering Ltd
  9 Cygnus Business Centre, Dalmeyer Road, LONDON, Greater London, NW10 2XA
• Climate Control South-Ea
  Unit 6 The Enterprise Centre, Cranborne Road, POTTERS BAR, Hertfordshire, EN6 3DQ
• Climate Services Ltd
  4 Swan Wharf Business Centre, Waterloo Road, UXBRIDGE, Middlesex, UB8 2RA
• Coglan Air Conditioning Services
  Churchill House, 137-139 Brent Street, LONDON, Greater London, NW4 4DJ
• Comfort Cooling Installations
  78 Woodland Road, LONDON, Greater London, E4 7EU
• Comfortair Hire & Sales UK Ltd
  135 Little Ealing Lane, LONDON, Greater London, W5 4EJ
• Conditioned Environment (Services) Ltd
  Ander House, 245 Acton Lane, LONDON, Greater London, NW10 7NR
• Constant Temperature Control Service Ltd
  Contract House, 202 North Cray Road, SIDCUP, Kent, DA14 5EL
• Cool Breeze Air
  34 Castleton Avenue, BEXLEYHEATH, Kent, DA7 6QU
• Cool Connections
  19 Hainault Road, ROMFORD, Essex, RM5 3AA
• Coolbusters
  44 Great Plumtree, HARLOW, Essex, CM20 2NT
• Coolways Ltd
  135 Aboyne Road, LONDON, Greater London, NW10 0EY
• Cpi Solutions Ltd
  71 School Lane, WELWYN, Hertfordshire, AL6 9PL
• Crisp Servicing
  583 Rayners Lane, PINNER, Middlesex, HA5 5HP
• Crystal Ice
  4 Dolman Road, LONDON, Greater London, W4 5UY
• Crystal Refrigeration Ltd
  4 Dolman Road, LONDON, Greater London, W4 5UY
• Current Development Ltd
  Unit 46 Brockley Cross Business Centre, Endwell Road, LONDON, Greater London, SE4 2PD
• D & T Vehicle
  8 Windmill Lane, Bushey Heath, BUSHEY, Hertfordshire, WD23 1NH
• D M Air Conditioning Solutions
  69 Northumberland Way, ERITH, Kent, DA8 3NX
• D R Refrigeration Services
  38 Radnor Road, LONDON, Greater London, SE15 6UR
• DS Ducts Ltd
  The Fulling Mill, Fulling Mill Lane, WELWYN, Hertfordshire, AL6 9NP
• Dammy Air Ltd
  43 Old Farm Close, HOUNSLOW, Middlesex, TW4 7AB
• Danimak Ltd
  Dagenham Dock Estate, Chequers Lane, DAGENHAM, Essex, RM9 6PR
• Dean & Wood Ltd
  Unit 4 The Highway Trading Centre, Heckford Street, LONDON, Greater London, E1W 3HR
• Delta Air Systems
  Holt Road, WEMBLEY, Middlesex, HA0 3PS
• Direct Commissioning Services
  8 Ashfields, LOUGHTON, Essex, IG10 1SB
• E A C Planned Maintenance Ltd
  Benhill Road, LONDON, Greater London, SE5 7QY
• E C S Air Conditioning Ltd
  42-44 Brockley Rise, LONDON, Greater London, SE23 1LJ
• Eagle Systems
  11 Stapylton Road, High Barnet, BARNET, Hertfordshire, EN5 4JJ
• Eastern Fabrications
  3 Horsecroft Place, HARLOW, Essex, CM19 5BT
• Easton Fabrications
  3 Horsecroft Place, HARLOW, Essex, CM19 5BT
• Emergency Refrigeration Services Ltd
  78 York Street, LONDON, Greater London, W1H 1DP
• Ems Engineering Maintenan
  15-29 Eyre Street Hill, LONDON, Greater London, EC1R 5LB
• Environmental Control Services Ltd
  Liberty Centre, Mount Pleasant, WEMBLEY, Middlesex, HA0 1TX
• Environmental Cooling UK Ltd
  4 The Progression Centre, Mark Road, HEMEL HEMPSTEAD, Hertfordshire, HP2 7DW
• Environmental Resolutions UK Ltd
  2 Bury Road, HATFIELD, Hertfordshire, AL10 8BJ
• Espace Airconditioning Ltd
  198a Halfway Street, SIDCUP, Kent, DA15 8DJ
• Etech Sales Ltd
  17 Nottingham Street, LONDON, Greater London, W1U 5ER
• Fermod Ltd
  Unit 2 Northumberland Close, Stanwell, STAINES, Middlesex, TW19 7LN
• Frost Duval Ltd
  Stanley Works, Stanley Road, SIDCUP, Kent, DA14 4DQ
• Fujitsu General UK Co Ltd
  Unit 150 Centennial Park, Centennial Avenue, Elstree, BOREHAMWOOD, Hertfordshire, WD6 3SG
• George S Industrial Services Ltd
  49 Theobald Street, BOREHAMWOOD, Hertfordshire, WD6 4RZ
• H M L Group Ltd
  4 Metro Business Centre, Kangley Bridge Road, LONDON, Greater London, SE26 5BW
• HRP Ltd
  Unit 18 Britannia Industrial Estate, Poyle Road, Colnbrook, SLOUGH, Berkshire, SL3 0BH
• HS Enviromental
  4 Rufus Business Centre, Ravensbury Terrace, LONDON, Greater London, SW18 4RL
• Habcold
  Unit 51 Waterside Trading Centre, Trumpers Way, LONDON, Greater London, W7 2QD
• Harrison-Page(Refrigeration)Limited
  63 Lion Road, BEXLEYHEATH, Kent, DA6 8NN
• Hayward Engineering Solutions Ltd
  78 Rectory Lane, LONDON, Greater London, SW17 9PY
• Hendrix Engineering Ltd
  44 Halsbury Road East, NORTHOLT, Middlesex, UB5 4PX
• Hpa Mechanical Services Ltd
  267 Wickham Street, WELLING, Kent, DA16 3LS
• Industrial Air Conditioning Ltd
  3 The Old Mill, Mill Lane, Watton at Stone, HERTFORD, Hertfordshire, SG14 3TB
• J L Services
  19 Wycombe Road, ILFORD, Essex, IG2 6UT
• JSP Building Products Ltd
  Adams Bridge Yard, South Way, WEMBLEY, Middlesex, HA9 0HB
• K & S Refrigeration & Air Conditioning Services
  62 Melbourne Road, LONDON, Greater London, E10 7HF
• Kencool Services
  73 Denham Way, Maple Cross, RICKMANSWORTH, Hertfordshire, WD3 9SL
• L J Refrigeration & Heating Service
  19 Thorncombe Road, LONDON, Greater London, SE22 8PX
• London & City Air Conditioning Contractors Ltd
  Ander House, 245 Acton Lane, LONDON, Greater London, NW10 7NR
• MP Air Conditioning
  71 Telham Road, LONDON, Greater London, E6 6BW
• Mac Air Conditioning Ltd
  Unit 11 Maple Park, Essex Road, HODDESDON, Hertfordshire, EN11 0EX
• Mala Electrical Ltd
  126 Petherton Road, LONDON, Greater London, N5 2RT
• Mala Maintenance Ltd
  126 130 Petherton Road, LONDON, Greater London, N5 2RT
• Marsden
  39 Kimberley Road, LONDON, Greater London, E4 6DF
• Maskold Ltd
  Unit 70 Wimbledon Stadium Business Centre, Riverside Road, LONDON, Greater London, SW17 0BA
• Max Air
  158 Ashcroft Square, King Street, LONDON, Greater London, W6 0YN
• Medalnorth Ltd
  73 Holywell Road, Studham, DUNSTABLE, Bedfordshire, LU6 2PD
• Melba Refrigeration
  49 Cornwallis House, India Way, LONDON, Greater London, W12 7QT
• Metair Mechanical Services Ltd
  Unit 21d Queensway, ENFIELD, Middlesex, EN3 4SZ
• Micra Air Conditioning Services
  9 Vicarage Road, WOODFORD GREEN, Essex, IG8 8NH
• Morris & Young
  5 Ash Industrial Estate, Flex Meadow, HARLOW, Essex, CM19 5TJ
• N Squared
  4 Lincoln Road, WEMBLEY, Middlesex, HA0 4SU
• Omega Environmental Technologies
  21-24 Cockspur Street, LONDON, Greater London, SW1Y 5BN
• Optimum F M Ltd
  1c Lyon Way, GREENFORD, Middlesex, UB6 0BN
• Optimum Sales Ltd
  1c Lyon Way, GREENFORD, Middlesex, UB6 0BN
• Ozcool Air Conditioning
  12 Aldenham Drive, UXBRIDGE, Middlesex, UB8 3UA
• Pinner Air Conditioning Ltd
  28 St.Thomas Drive, PINNER, Middlesex, HA5 4SS
• Plus 2 Minus Degrees C Ltd
  24 Ealing House, 33 Hanger Lane, LONDON, Greater London, W5 3HJ
• Quentrall Air Conditionin
  597 High Road, LONDON, Greater London, N12 0DY
• Question Air
  25 Hatfields, LOUGHTON, Essex, IG10 1TJ
• R A S Installations Ltd
  28 Coopers Row, IVER, Buckinghamshire, SL0 0HW
• R E M
  162 Chase Cross Road, ROMFORD, Essex, RM5 3UU
• S B H Design & Installation Services Ltd
  319 Ballards Lane, LONDON, Greater London, N12 8LY
• S.A.S. Refrigeration Ltd
  137-139 Harrowdene Road, WEMBLEY, Middlesex, HA0 2JH
• SNR Refrigeration Services
  10 Courtenay Road, East Lane Buisness PSRK, WEMBLEY, Middlesex, HA9 7NA
• Sabreglen Ltd
  Unit 22 Marlowe Business Centre, Batavia Road, LONDON, Greater London, SE14 6BQ
• Silvercrest Air Conditioning Ltd
  17 Bramfield Place, HEMEL HEMPSTEAD, Hertfordshire, HP2 7NZ
• Slidaway Ltd
  5 Gardener Industrial Estate, Kent House Lane, BECKENHAM, Kent, BR3 1QZ
• Slideaway
  5 Gardener Industrial Estate, Kent House Lane, BECKENHAM, Kent, BR3 1QZ
• Spearhead Environmental Control Ltd
  Crauford Bus Park, Silverdale Road, HAYES, Middlesex, UB3 3BL
• Staycool
  Rear of, 1 East Dulwich Road, LONDON, Greater London, SE22 9BA
• Stiff Nipples
  Bridge Works, Iver Lane, UXBRIDGE, Middlesex, UB8 2JF
• Stonegrove Refrigeration Services
  D6 The Seedbed Centre, HARLOW, Essex, CM19 5AF
• Stream Enviromental
  100-102 Headstone Road, HARROW, Middlesex, HA1 1PF
• Swegon Ltd
  Astra Centre, Edinburgh Way, HARLOW, Essex, CM20 2BN
• T2 Building Servicesd Ltd
  Unit 164 Lea Valley Technopark, Ashley Road, LONDON, Greater London, N17 9LN
• Taymill
  100 Park Mead, SIDCUP, Kent, DA15 9PF
• Thermacool Refrigeration & Airconditioning Ltd
  92 Axholme Avenue, EDGWARE, Middlesex, HA8 5BG
• Thermal Tech Control
  10 Ashbourne Parade, LONDON, Greater London, W5 3QS
• Tideside Ltd
  5 Bow Exchange, Yeo Street, LONDON, Greater London, E3 3QR
• Top Products
  Adams Bridge Yard, South Way, WEMBLEY, Middlesex, HA9 0HB
• Trinco Engineering Ltd
  66 Chatsworth Crescent, HOUNSLOW, Middlesex, TW3 2PB
• Two Oceans
  Unit 6 Hurlingham Studios, Ranelagh Gardens, LONDON, Greater London, SW6 3PA
• U & K Heating
  32 Pates Manor Drive, FELTHAM, Middlesex, TW14 8JJ
• Uni-Cool Ltd
  4b Marechal Niel Parade, Main Road, SIDCUP, Kent, DA14 6QF
• United Refrigeration Ltd