ISO 9001 (Quality) - ISO 14001 (Environment) - OHSAS 18001 (Health & Safety) Heartfield Ventilation & Air Conditioning Ltd, 2 Fieldings Road, Cheshunt, Hertfordshire EN8 9TL - Registered No: 1875774 T: 01992-630770 - F: 01992-620775 - E: info@hvacltd.co.uk - W: www.hvacltd.co.uk Situation: John Lewis Kingston was fitted out in 1990 and was operating on its original boiler plant. As t

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