MHG Heating Ltd © MHG Heating Ltd. Unit 4 Epsom Downs Metro Centre, Waterfield,

MHG Heating Ltd © MHG Heating Ltd. Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR Phone 08456 448802, Fax 08456 448803 Info@mhgheating.co.uk, www.mhgheating.co.uk 011109 1 Air Supply, Ventilation and Balance Flue Terminal Positioning Quick Reference Guide for BS 5440-2 : 2000, BS 6644 : 2005 & IGE/UP/10 (ed 2) BS5440-2 : 2000. Installation and maintenance of flue and ventilation for gas appliances of rated input not exceeding 70 kW net (1st 2nd & 3rd family gases) Open Flued Appliances Installed within a Room (Natural ventilation requirements direct to Outside Air.) Total rated net input not in excess of (70 kW – 7 kW) x 5cm2 = Ventilation opening free area Open Flued Appliances Installed within a compartment (Natural ventilation requirements.) Ventilation route Grille Location Ventilation to room or internal space. (The internal space ventilated into must be ventilated as detailed above to outside air.) Ventilation direct to outside air Low Level (Free Area / kW) 20 cm2 10 cm2 High Level (Free Area / kW) 10 cm2 5 cm2 Balanced Flued Appliances Installed within an Enclosure (Natural ventilation requirements) Ventilation route Grille Location Ventilation to room or internal space. Ventilation direct to outside air Low Level (Free Area / kW) 10 cm2 5 cm2 High Level (Free Area / kW) 10 cm2 5 cm2 Document Intended for quick guidance only. Absolute guidance must be sought from BS5440 2 : 2000 directly. BS6644 :2005 Specification for the Installation of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases) Open Flued Appliances Installed within an Enclosure (Natural ventilation requirements direct to Outside Air.) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level (Free Area / kW) 10 cm2 11 cm2 12cm2 High Level (Free Area / kW) 5 cm2 6 cm2 7 cm2 Open Flued Appliances Installed within a Boiler Room (Natural ventilation requirements direct to Outside Air.) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level (Free Area / kW) 4 cm2 5 cm2 6 cm2 High Level (Free Area / kW) 2 cm2 3 cm2 4 cm2 MHG Heating Ltd © MHG Heating Ltd. Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR Phone 08456 448802, Fax 08456 448803 Info@mhgheating.co.uk, www.mhgheating.co.uk 011109 2 Balanced Flued Appliances Installed within an Enclosure (Natural ventilation requirements direct to Outside Air) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level (Free Area / kW) 5 cm2 5 cm2 5 cm2 High Level (Free Area / kW) 5 cm2 5 cm2 5 cm2 Balanced Flued Appliances Installed within an Enclosure (Natural ventilation requirements to a room or internal space.) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level (Free Area / kW) 10 cm2 10 cm2 10 cm2 High Level (Free Area / kW) 10 cm2 10 cm2 10 cm2 Balanced Flued Appliances Installed within a Boiler Room (Natural ventilation requirements direct to Outside Air.) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level (Free Area / kW) 2 cm2 3 cm2 4 cm2 High Level (Free Area / kW) 2 cm2 3 cm2 4 cm2 Document Intended for quick guidance only. Absolute guidance must be sought from BS6644 : 2005 directly. Open Flued Appliances Installed with a Draught Diverter (Mechanical ventilation flow rate requirements direct to Outside Air.) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level Inlet (m3/h / kW) 2.8 3.52 4.24 High Level Extract (m3/h / kW) (Difference Between Inlet and Extract Air) 2.07 +/- 0.18 2.07 +/- 0.18 2.07 +/- 0.18 Open Flued Appliances Installed without a Draught Diverter (With or without stabilizers) (Mechanical ventilation flow rate requirements direct to Outside Air.) System Type & Operational Time Grille Location Heating &/or HWS Operation < 50% time operation during summer months Heating &/or HWS Operation > 50% < 75% time operation during summer months Heating &/or HWS Operation > 75% time operation during summer months Low Level Inlet (m3/h / kW) 2.6 3.32 4.04 High Level Extract (m3/h / kW) ) (Difference Between Inlet and Extract Air) 1.35 +/- 0.18 1.35 +/- 0.18 1.35 +/- 0.18 Where high level / discharge openings are not mechanically assisted, the free area must be calculated as detailed above. All air inlet and extract fans must be fitted with automatic controls (interlocks) causing safety shut-down or lockout of the installed gas burning appliances in the event of an inlet or extract air flow failure. Document Intended for quick guidance only. Absolute guidance must be sought from BS6644 : 2005 directly. MHG Heating Ltd © MHG Heating Ltd. Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR Phone 08456 448802, Fax 08456 448803 Info@mhgheating.co.uk, www.mhgheating.co.uk 011109 3 IGE/UP/10 Part 1 Edition 2 Installation of gas appliances in industrial and commercial premises . Guidance for installations with Inputs in Excess of 1.8 MW net.(2nd and 3rd family gases) Open Flued Appliances Installed within a Boiler Room (Natural ventilation requirements direct to Outside Air.) Grille Location Ventilation Requirement Calculations Low Level (Free Area) 9270 cm2 + 4cm2 Per kW of total net heat input in excess of 1.8MW High Level (Free Area) 4635 cm2 + 2cm2 Per kW of total net heat input in excess of 1.8MW 1. For lighter than air gases where high and low level ventilation is not practicable and the volume of the space is equal to or greater than 1m3 per 2kW total net input, it is permitted to install 6cm2 per kW of total ventilation at high level only provided more than one ventilator is fitted. This is not permitted for heavier than air gasses. 2. For lighter than air gases where the plant room does not exceed 1m3 per 2kW total net heat input, ducting of ventilation air to low level without mechanical assistance is not recommended. Open Flued Appliances. Modern low radiation losses and low excess air burners. (Mechanical ventilation flow rate requirements direct to Outside Air.) Burner Type Flow rate per 1000 kW heat input net (m3/s) Inlet Air (Combustion and Ventilation) Extract Air (Ventilation) Natural draught 1.2 (1.1 gross heat input) 0.5 (0.45 gross heat input) Forced draught, Blown Air, Premix 1.0 (0.9 gross heat input) 0.66 (0.6 gross heat input) Where high level / discharge openings are not mechanically assisted, the free area must be calculated as detailed above. All air inlet and extract fans must be fitted with automatic controls (interlocks) causing safety shut-down or lockout of the installed gas burning appliances in the event of an inlet or extract air flow failure. Document Intended for quick guidance only. Absolute guidance must be sought from IGE/UP/10 Edition 2 directly. (07/09/06) MHG Heating Ltd is the UK subsidiary of MHG Heiztechnik GmbH. MHG Heiztechnik GmbH has been a leading European premium heating equipment manufacturer for over 80 years. MHG’s boilers have been marketed in the UK for many years, however MHG can now supply and support UK customers directly with its entire range of products. This means that existing MHG product owners now have the option to use MHG’s service engineers and new clients have the option to deal directly with one of Europe’s leading premium heating equipment manufacturers. The benefits for MHG’s UK clients will include the ability to have direct prices on MHG’s full range of quality products including the well-known gas condensing range, oil condensing boilers, award winning Blue Flame Oil Rocket Burner©, heat pumps, thermal solar systems and innovative and heating product award nominated ThermiPro Hybrid Heat Station and EcoStar Oil hybrid unit. As you would expect from a German group of companies, MHG is committed to providing quality products and the highest level of customer support, encompassing selection, application, commissioning and annual servicing at competitive prices. Technical support is available 7 days a week uploads/Geographie/ bs5440-quick-guide.pdf

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