Big Book of Hamworthy Products and Services

Midtherm Engineering Ltd Midtherm Engineering are part of the family-owned Midtherm group of companies which has been trading for nearly fifty years. They have a wealth of experience and a passionate team delivering first class design, manufacture and installation throughout the UK and as far afield as the United Arab Emirates. Notable projects they have successfully completed include: ‰‰ The Burj Khalifa in Dubai ‰‰ The Bank of England ‰‰ The Palace of Westminster ‰‰ 10 Downing Street ‰‰ MOD Headquarters Whitehall ‰‰ Kensington Palace ‰‰ Tower of London ‰‰ Tower Bridge ‰‰ All England Lawn Tennis Club For flue requirements Midtherm Engineering can be contacted: Tel: 01384 455 811 Email: midtherm@hamworthy-heating.com Flue standards There are many standards which cover flues and affect the design, selection and installation. Flue discharge requirements The key standards are detailed below: Standard Scope IGEM UP10 Edition 4 Gas: 70kW – 20MW BS6644:2011 Gas: 70kW – 1.8MW BS5440 Gas: Up to 70kW BS5410-1 Oil: Up to 45kW BS5410-2 Oil: Over 45kW Chimney Heights Memorandum (Clean Air Act) All Fuels: 150kW – 150MW Building Regulations Document J Gas: Up to 70kW Oil: Up to 45kW Solid Fuel: Up to 45kW Vertical flue termination clearances Horizontal flue termination clearances Input (kW) To taller structure (m) Above roof (m) From opening above (m) From other opening (m) 70 2.50 0.60 2.5 1.50 100 2.50 0.70 2.5 1.79 150 2.50 0.87 2.5 2.26 200 2.59 1.05 2.5 2.74 250 2.96 1.22 2.5 3.21 300 3.30 1.39 2.5 3.69 400 3.92 1.50 500 4.49 1.50 600 5.00 1.50 700 5.49 1.50 800 5.95 1.50 900 6.38 1.50 1000 6.80 1.50 Use the charts below to see the requirements you must adhere to for flues. Products that perform | Service that delivers | People that care 84

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