City & Guilds Level 3 Diploma in Refrigeration, Air Conditioning and Heat Pump Systems (6090)City & Guilds Refrigeration and Air-conditionin (7189) Level 2 or 3F-Gas Catego ry 1 (City & Guilds 2079, was 2078 Safe Handling of Refrigerants)BS7671 Electrical Regulations (18th Edition)Must hold a full U...