City &\nGuilds Level 3 Diploma in Refrigeration, Air Conditioning and Heat Pump Systems (6090) \nCity &\nGuilds Refrigeration and Air-conditionin (7189) Level 2 or 3 \nF-Gas Catego ry 1 (City &\nGuilds 2079, was 2078 Safe Handling of Refrigerants) \nBS7671 Electrical Regulations (18th Edition) \nMus...