BS 5871-3:2005
$189.07
Specification for the installation and maintenance of gas fires, convector heaters, fire/back boilers and decorative fuel effect gas appliances – Decorative fuel effect gas appliances of heat input not exceeding 20 kW (2nd and 3rd family gases)
| Published By | Publication Date | Number of Pages |
| BSI | 2005 | 46 |
This part of BS 5871 specifies installation and maintenance requirements for open flued decorative fuel effect gas appliances of heat input not exceeding 20 kW (see Note 2) burning 2nd and 3rd family gases in rooms or internal spaces in domestic (see Note 4) or commercial premises, including public houses and restaurants.
The provisions contained within this standard cover the selection of a suitable appliance, the ventilation and flueing requirements, and other measures necessary to ensure a safe installation.
This standard applies to the installation of decorative fuel effect gas appliances in builder’s openings, fireplace recesses, flue boxes or under associated independent canopies. (See Figure 5.) It does not cover the installation of flueless or room-sealed appliances.
This standard is not applicable to mobile and portable appliances in conformity with BS EN 449 or to appliances in touring caravans.
NOTE 1 Attention is drawn to the foreword concerning fuel effect appliances which burn gas for a decorative effect. The only types of such appliance covered by this part of BS 5871 are those detailed in b) 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 parenthesis where deemed necessary. [See also Clause 5, commentary and recommendations b).]
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 caravan holiday homes, residential park homes and permanently moored boats. See IGE/UP/8 [8].
NOTE 5 Appliances of over 20 kW: although many of the requirements within this standard will equally apply to appliances with a rated heat input in excess of 20 kW, additional or alternative requirements may also be applicable in order to achieve a safe installation. Reference should be made to the Building Regulations and supporting guidance or requirements thereto.
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 air vent air vent free area associated independent canopy builder’s opening chimney breast chimney pot decorative fuel effect gas appliance factory made insulated chimney fanned flue system firebed fireplace opening fireplace recess flue box |
| 9 | flue pipe flue system gather hearth internal space lintel open flue system (type B) open-flued appliance (type B) throat through-room ventilation |
| 10 | 4 Exchange of information and planning 4.1 General 4.2 Design considerations 5 Appliances |
| 12 | 6 Materials and components 7 Location 7.1 The appliance shall not be installed in a room or internal space containing a bath or shower. 7.2 Appliances of greater than 12.7�kW heat input (14�kW gross) shall not be installed in a room … 7.3 A gas appliance of not greater than 12.7�kW (14�kW gross) heat input installed in a room used… 7.4 An appliance for use with 3rd family gases shall not be installed in a room or internal space… |
| 13 | Figure 1 – Type of fuel effect gas appliances covered by BS 5871 |
| 14 | 8 Ventilation 8.1 General 8.2 Sizing 8.3 Location 8.4 Multi-appliance installations |
| 16 | 8.5 Effect of fans 9 Flueing 9.1 General 9.2 Flue system (general) |
| 18 | Table 1 – Designation system for metal chimneys for use with gas fires 9.3 Flue system (natural draught) |
| 19 | Figure 2 – Flue/fireplace sizing chart for decorative fuel effect gas appliances |
| 21 | Appliance installation in typical flue box |
| 23 | Figure 4 – Unsuitable terminations |
| 24 | 9.4 Flue system (fanned draught) 10 Appliance fixing 10.1 General 10.2 Correct operation of the flue 10.3 Siting |
| 25 | 10.4 Removal for servicing 10.5 Appliance projection and canopy size 10.6 Replacement components or accessories |
| 26 | 11 Fire and related safety precautions 11.1 General 11.2 User protection |
| 27 | Figure 5 – Typical fireplaces in which appliance may be installed |
| 28 | Figure 6 – Constraints required to determine chimney size using method 2 for cases 4, 5 and 6 |
| 29 | 11.3 Floor protection from radiant heat |
| 30 | 12 Gas supply 12.1 Gas installation pipework to the appliance shall be in accordance with BS�6891 or IGE/UP/2 [… 12.2 Connections to the appliance shall not be subject to strain. 12.3 Where the final connection to the fire is to be concealed, any part of the gas supply pipe b… 12.4 Flexible gas connections shall not be used. 12.5 A gas cock or other means of isolation shall be fitted on the inlet supply as close as is pr… 12.6 Where an appliance is located in a flue box, the gas supply shall only pass through the wall… |
| 31 | 13 Electricity supplies and wiring 13.1 Any electrical wiring installation to the appliance or fan shall conform to BS 7671. 13.2 Electricity supplies to the appliance and any ancillary electrical controls shall be install… 13.3 Any point of connection to the mains electricity shall be readily accessible and the method … 13.4 All fuses shall be rated in accordance with the appliance manufacturer’s instructions. 14 Commissioning 14.1 All gas fittings forming part of the installation shall be tested for gas tightness, and pur… 14.2 The gas rate or pressure shall be checked and adjusted, where necessary, to the correct sett… 14.3 The ventilation provision shall be checked for conformity with Clause 14.4 The appliance shall be checked for spillage in accordance with the appliance manufacturer’s … |
| 32 | 14.5 Correct and safe appliance operation shall be checked in accordance with the appliance manuf… 15 Instructions and use of fireguards 16 Advice to be given to the user 16.1 Operating instructions |
| 33 | 16.2 Maintenance |
| 34 | Annex A (informative) Calculation of clearance flue flow A.1 Introduction A.2 Determination of clearance A.3 Preparation of appliance A.4 Gas tightness General Table A.1 – Test internal air pressure Method |
| 35 | A.5 Heat input General Table A.2 – Wobbe number for test gases Tolerance Table A.3 – Inlet pressure for tolerances Calculation of reference gas heat input |
| 36 | A.6 General conditions of test Test room |
| 37 | Test method |
| 38 | Table A.4 – K values for reference gases A.7 Determination of clearance flue flow |
| 39 | Figure A.1 – Bubble leak indicator |
| 40 | Figure A.2 – Basic test box |
| 41 | Figure A.3 – Test box and flue for appliances that can be installed in a metal flue box |
| 42 | Figure A.4 – Collecting hood |
| 43 | Figure A.5 – Collecting hood positioning |
