BS 5440-1:2008

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Competence
5 General
   5.1 Compatibility of appliances and chimneys
   5.2 Chimney outlets
   5.3 Chimneys for use with condensing appliances (open-flued
        and room-sealed)
   5.4 Location of appliances
   5.5 Passive stack ventilation
   5.6 Exchange of information and planning
   5.7 Maintenance
6 Individual open-flued natural draught Types B[11], B[12], B[13]
   appliances
   6.1 Design
   6.2 Installation
   6.3 Commissioning
   6.4 Radon gas systems present
   6.5 Maintenance
7 Individual open-flued fanned draught Types B[14], B[22], B[23]
   appliances and fanned draught chimneys
   7.1 Design
   7.2 Installation
   7.3 Commissioning
   7.4 Maintenance
8 Shared open flue chimney for natural draught Types B[11], B[12],
   B[13] appliances
   8.1 Design
   8.2 Installation
   8.3 Maintenance
9 Room-sealed natural draught chimney configurations (balanced flue)
   for Type C[11] appliances
   9.1 General
   9.2 Installation
   9.3 Installation checks
   9.4 Maintenance
10 Room-sealed: fanned draught chimney configurations balanced flue
   (Type C[12], C[13], C[32] and C[33]) and non-balanced flue (Type
   C[52], C[53], C[62] and C[63]) appliances
   10.1 Design options
   10.2 Installation
   10.3 Installation checks
   10.4 Maintenance
11 Balanced compartment
   11.1 General
   11.2 Design
   11.3 Balanced compartment construction
   11.4 Temperature effects
   11.5 Terminals
   11.6 Commissioning
   11.7 Maintenance
12 Room-sealed Types C[2] and C[4] appliances for shared chimneys
   12.1 Selection and installation of a suitable chimney
   12.2 Terminal design and location
   12.3 Inspection
   12.4 Selection and installation of compatible appliances
   12.5 Commissioning
   12.6 Maintenance
13 Special categories of chimney
   13.1 Chimneys for Type C[7] ("Vertex") appliances
   13.2 Other open flue fanned draught chimneys
Annexes
Annex A (informative) Classifications
Annex B (informative) Calculation method for flue sizing
Annex C (normative) Chimney outlet positions
Annex D (informative) Guidance on the design and installation of
                      flue block systems in the UK
Annex E (informative) Checking of case seals and the general
                      integrity of room-sealed fan assisted positive
                      pressure gas appliances
Annex F (normative) Design criteria for terminals for shared system
                    chimneys
Bibliography

Defines requirements for the installation of gas appliances to chimneys, chimney installation work likely to be undertaken by gas engineers and operatives working under UK gas industry conditions and requirements for the maintenance of chimneys.

This part of BS 5440 specifies requirements for the installation of gas appliances to chimneys, chimney installation work likely to be undertaken by gas engineers and operatives working under UK gas industry conditions and requirements for the maintenance of chimneys. It is applicable to open flue chimneys for Type B gas appliances and room-sealed chimney configurations for Type C gas appliances, each of rated input not exceeding 70 kW net (see Note 2 and Note 3), burning 1st, 2nd or 3rd family gases. It applies to chimneys of the natural draught or fanned draught type and is applicable to open flue chimneys and room-sealed chimneys supplied with the appliance as well as to those supplied separately.

NOTE 1 Type B and Type C appliances are explained in Table A.1.

It complements the requirements for the design, installation and commissioning of chimneys as required in BS EN 15287-1 and BS EN 15287-2 and requires extra details that are specific to the UK gas industry. This is kept in perspective by quoting some details of BS EN 15287-1 and BS EN 15287-2.

It specifies the following:

• requirements for the selection of the appropriate flueing option for gas appliances in the UK;
• requirements for the installation of gas appliances to new chimneys, or chimney configurations;
• requirements for the installation of gas appliances to existing chimneys or chimney configurations;
• requirements for the installation of appliances which carry a CE mark and for which the manufacturer’s instructions are available to the installer;
• requirements installation of appliances which do not carry a CE mark and used/second-hand appliances for which the manufacturer’s instructions are available to the installer.

This part of BS 5440 is applicable to:

• complete chimney and all chimney components from the appliance connection to the discharge point into outside air;
• the installation of gas appliances to existing chimneys that were intended originally for appliances burning other fuels;
• chimneys for residential park homes but not to chimneys for leisure accommodation vehicles.

This part of BS 5440 is not applicable to gas-fired incinerators. Refer to BS 5871-3 for the installation of decorative fuel effect appliances.

This part of BS 5440 includes compatibility of appliances installed in the UK with new chimneys designated under BS EN 1443 and with existing chimneys, including non-designated chimneys.

NOTE 2 In the case of an individual appliance connected to a chimney the 70 kW maximum rated input relates to that appliance. In the case of more than one appliance in the same room connected to a single chimney the 70 kW maximum rated input relates to the sum of the rated inputs of all the appliances. In the case of appliances in separate dwellings connected to a shared flue in a chimney, e.g. a SE-duct or a U-duct, the 70 kW maximum rated input relates to the rated input of each individual appliance.

NOTE 3 Installation of LPG (liquefied petroleum gas) systems in leisure accommodation vehicles is specified in BS EN 1949 and further guidance is given in the Institution of Gas Engineers and Managers publication IGE/UP/8 [9].

NOTE 4 Installation of gas-fired hot water boilers having rated inputs exceeding 70 kW is specified in BS 6644.

NOTE 5 The data in this British Standard refers to heat input expressed in terms of net calorific values (CV) with conversion given for natural gas gross CV quoted in brackets where appropriate. The ratio of gross heat input: net heat input is approximately 1.1:1 for natural gas propane and butane. For example, conversion of 9 kW input based on gross CV for natural gas to the equivalent net CV input is as follows: net input = 9.0/1.1 = 8.2 kW.