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BS 5440-2:2023

BS 5440-2:2023

$167.15

Chimneys, flue pipes and ventilation for gas appliances of rated input not exceeding 70 kW net (1st, 2nd and 3rd family gases) – Installation and maintenance of ventilation provision for gas appliances. Specification

Published By Publication Date Number of Pages
BSI 2023 36
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PDF Catalog

PDF Pages PDF Title
5 Foreword
7 1 Scope
2 Normative references
8 3 Terms and definitions
Figure 1 — Typical air vent arrangements
11 4 Competence
5 Design and materials for air vents and ducts
5.1 Design
13 Table 1 — Minimum separation distances between air vents and appliance terminals
14 5.2 Materials
5.3 Intumescent air vents
5.4 Fire-rated compartments
15 6 Equivalent free area
6.1 General
6.2 Room-sealed appliances installed in an appliance compartment
Table 2 — Minimum air vent equivalent free area for appliance compartments: room-sealed appliances
16 6.3 Open-flued appliances
17 Table 3 — Minimum air vent equivalent free area for appliance compartments: open-flued appliances
18 6.4 Flueless appliances
Table 4 — Minimum permanent opening equivalent free area for flueless appliances
19 6.5 Multi-appliance installations
20 7 Positioning of air vents
7.1 Air vents direct to outside
7.2 Air vents not communicating directly with outside air
21 Figure 2 — Roof space terminal
7.3 Air vents in series
Figure 3 — Air vents in series
23 7.4 Room-sealed appliances
Figure 4 — Air vent positions for a room-sealed appliance in an appliance compartment, room and internal space
24 7.5 Open-flued appliances
25 Figure 5 — Air vent positions for an open-flued appliance in a room or internal space
27 Figure 6 — Air vent positions for an open-flued appliance in an appliance compartment
29 Figure 7 — Examples of incorrect air vent positions for an open-flued appliance in an appliance compartment
8 Other aspects of ventilation
8.1 Effect of fans
30 8.2 Passive stack ventilation
8.3 Radon gas
8.4 Internal kitchens
9 Maintenance
31 Annex A (normative)  Existing proprietary air vents and non‑proprietary air vents
32 Figure A.1 — Equivalent free areas
33 Bibliography

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BS 5440-2:2023
$167.15