BS 5871-1:2005
$198.66
Specification for the installation and maintenance of gas fires, convector heaters, fire/back boilers and decorative fuel effect gas appliances – Gas fires, convector heaters, fire/back boilers and heating stoves (2nd and 3rd family gases)
| Published By | Publication Date | Number of Pages |
| BSI | 2005 | 66 |
This part of BS 5871 specifies installation and maintenance requirements for flued fixed space heating appliances burning 2nd and 3rd family gases for the purpose of heating rooms or spaces in domestic (see Note 4) or commercial premises. It applies to appliances known as radiant gas fires, radiant convector gas fires, convector heaters, and heating stoves. Combined appliances of the type where a gas fire is used in conjunction with a boiler or circulator are also covered in so far as the installation of the combined appliance is concerned.
This standard covers the selection of a suitable appliance, the flueing and/or ventilation requirements, and other measures necessary to ensure a safe installation.
The central heating and/or hot water system connected to a combined appliance is not within the scope of this standard and reference should be made to BS 5449 (see Note 5) and BS 5546 for this part of such an installation.
This standard is not applicable to:
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mobile and portable appliances conforming to BS EN 449; or
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appliances in touring caravans; or
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open-fronted radiant-convector heaters without a dress guard.
Additional requirements for the installation of fire/back boilers and fire/back circulators are specified in Clauses 15, 16, 17 and 18.
NOTE 1 Attention is drawn to the foreword concerning fuel effect appliances which burn gas so as to simulate a solid fuel fire or produce other decorative effects. The only types of such appliances covered by this part of BS 5871 are those detailed in i) of the commentary and recommendations on Clause 5 of this standard. Further guidance in this respect is given in Figure 1.
NOTE 2 Heat inputs in this document are based on net calorific value. Figures based on gross calorific value are given in parentheses where deemed necessary. (See also Clause 5, commentary and recommendations, h).
NOTE 3 Attention is drawn to the foreword concerning the installation of used appliances.
NOTE 4 As well as normally constructed dwellings, domestic premises include any permanently sited caravans, holiday homes, residential park homes and permanently moored boats. See IGE/UP/8 [8].
NOTE 5 BS 5449 has been partly replaced by BS EN 12828 and BS EN 12831, and is to be withdrawn once BS EN 14336 and BS EN 14337 are published.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British Standard |
| 3 | Contents |
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions 3.1 air vent 3.2 back boiler 3.3 back circulator 3.4 balanced-flued appliance 3.5 builder’s opening |
| 9 | 3.6 closure plate 3.7 condensing appliance 3.8 convector heater 3.9 direct flue connection 3.10 dress guard 3.11 fanned flue system 3.12 fireguard 3.13 fireplace opening 3.14 fireplace recess 3.15 fire surround 3.16 flue box 3.17 flue gas collector |
| 10 | 3.18 flue pipe 3.19 flue spigot restrictor 3.20 gas fire 3.21 hearth 3.22 heating stove 3.23 imitation fuel 3.24 infill panel 3.25 installation instructions 3.26 internal space 3.27 open flue system (type B) 3.28 open-flued appliance (type B) 3.29 radiant |
| 11 | 3.30 radiant convector gas fire 3.31 radiant gas fire 3.32 room-sealed appliance (type C) 3.33 ventilation 4 Exchange of information and planning 4.1 General 4.2 Design considerations |
| 12 | 5 Appliances |
| 14 | Figure 1 – Types of fuel effect appliances covered by BS 5871 |
| 15 | 6 Materials and components 7 Location |
| 16 | 8 Appliance sizing Table 1A – Temperatures and ventilation rates Table 1B – Air change rates for rooms with open fires and flues up to 40 000 mm |
| 17 | 9 Ventilation 9.1 General 9.2 Multi-appliance installations 10 Flueing 10.1 General |
| 18 | Table 2 – Designation system for metal chimneys for use with gas fires 10.2 Bird guards |
| 19 | 10.3 Masonry chimneys 10.4 Precast flue block chimneys |
| 20 | 10.5 Concrete cast in situ flue liners 10.6 Prefabricated metal flue systems |
| 21 | Figure 2 – Method of installing a gas fire in conjunction with a flue box and flue pipe |
| 22 | Figure 3 – Methods of using a flue liner in a masonry chimney installation serving a gas appliance, other th… |
| 23 | 10.7 Proprietary fanned draught flue systems 10.8 Condensing appliances |
| 24 | 10.9 Multi-appliance installations Figure 4 – Installation of a side exit fanned draught flue system 11 Appliance fixing 11.1 General |
| 25 | 11.2 Siting 11.3 Open-flued appliances |
| 26 | Table 3 – Minimum void volumes and depths below gas fire flue spigots |
| 28 | Figure 5 – Method of installing a gas fire or convector heater on an existing or new solid fuel hearth |
| 30 | Figure 6 – Method of wall mounting a gas fire on an existing chimney breast |
| 32 | Figure 7 – Method of installing a gas fire on the hearth of a precast block chimney |
| 33 | Figure 8 – Method of installing an open-flued live fuel effect gas fire with an integral draught diverter on… |
| 35 | Figure 9 – Method of installing an open-flued live fuel effect gas fire with integral draught diverter onto … |
| 37 | Figure 10 – Application of direct flue connection appliances |
| 38 | 11.4 Heating stoves 11.5 Room-sealed appliances |
| 39 | Figure 11 – Installation of a heating stove connected to a factory made chimney or flue system |
| 40 | Figure 12 – Installation of a freestanding heating stove located in a builder’s opening |
| 41 | Figure 13 – Installation of a freestanding heating stove using a closure plate |
| 42 | 12 Fire precautions 12.1 Floor protection/hearths and bases |
| 43 | 12.2 Protection at rear of appliance 12.3 Side wall protection 12.4 Shelf protection 12.5 Protection of adjacent combustible material |
| 44 | 12.6 Dress guard 13 Gas supply 13.1 Gas installation pipework to the appliance shall be in accordance with BS�6891 or IGE/UP/2 [… 13.2 Connections to the appliance shall not be subject to strain. 13.3 Where the final connection to the appliance is to be concealed, any part of the gas supply p… 13.4 All connections, whether concealed or not, shall allow the fire to be removed for periodic i… 13.5 A gas cock or other means of isolation shall be fitted on the inlet supply as close as is pr… 13.6 Where an appliance is located in a flue box, the gas supply shall only pass through the wall… |
| 45 | Figure 14 – Typical unconcealed gas supply system to a gas fire 14 Electricity supplies and wiring 14.1 The electrical wiring installation to the appliance shall conform to BS�7671. 14.2 Electricity supplies to the appliances and any ancillary controls shall be installed in acco… 14.3 All fuses shall be rated in accordance with the appliance manufacturer’s instructions. |
| 46 | 14.4 Any point of connection to the mains electricity shall be readily accessible and the method … 15 Ventilation (Fire/back boilers and fire/back circulators only) 16 Appliance fixing (Fire/back boilers and fire/back circulators only) 16.1 Existing unlined chimneys |
| 47 | 16.2 Existing lined chimneys 16.3 Extensions to chimney breasts 16.4 Sealing of extraneous openings to back boiler/circulator enclosures 16.5 Flue termination |
| 48 | Figure 15 – Installation of a gas fire and combined back boiler where a chimney breast is extended to form a … |
| 49 | Figure 16 – Installation of a gas fire and combined back boiler using a back boiler enclosure and prefabricat… |
| 50 | 16.6 Precast flue block chimney or a flue pipe 17 Fire precautions (Fire/back boilers and fire/back circulators only) 17.1 Floor protection/hearths and bases 18 Water connections (Fire/back boilers and fire/back circulators only) |
| 51 | 19 Commissioning 20 Instructions and use of fireguards |
| 52 | 21 Advice to be given to the user 21.1 Operating instructions 21.2 Maintenance |
| 53 | Annex A (informative) Calculation of required heat output of an appliance A.1 Sizing a room heater A.2 Fabric heat losses A.3 Ventilation heat losses A.4 Calculation method and examples |
| 54 | Table A.1 – Fabric and ventilation heat losses for example A Table A.2 – Fabric and ventilation heat losses for example B |
| 55 | Annex B (informative) Calculation of clearance flue flow B.1 Introduction B.2 Determination of clearance B.3 Preparation of appliance B4 Gas tightness Table B.1 – Test internal air pressures |
| 56 | B.5 Heat input Table B.2 – Wobbe numbers for test gases Table B.3 – Inlet pressures for tolerances |
| 57 | B.6 General conditions of test |
| 59 | Table B.4 – K values for reference gases B.7 Determination of clearance flue flow Figure B.1 – Bubble leak indicator |
| 60 | Figure B.2 – Basic test box |
| 61 | Figure B.3 – Test box and flue for appliances that can be installed in a metal flue box |
| 62 | Figure B.4 – Collecting hood |
| 63 | Figure B.5 – Collecting hood positioning |
