BS 6644: 1991
British Standard Specification for
Installation of gas-fired hot water boilers of rated inputs between 60kW and 2MW
(2nd and 3rd family gases) |
| Previously, it has always been necessary to provide high and low level ventilation to any boiler house. The British Standard now permits high level only ventilation, or a Boiler Compartment, provided a proprietary system is used. |
Although invented almost 40 years ago, and widely used in commercial applications for the last 20 years, the unique advantage of the Monodraught system is now formally recognised by a British Standard. |
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The main Clauses covering the Balanced Compartment system are shown, and this method is to be preferred against and mechanical means of boiler house ventilation.
The proprietary Monodraught system is manufactured for each Project according to the boiler loading, number of boilers and flue size. Advice is readily given on the correct size system for each individual project. Further technical specification guidance notes are available from Monodraught to cover all aspects of installation details.
Monodraught enjoy a very close working relationship with all leading boiler manufacturers and suitable advice is always readily available regarding the siting of any Monodraught terminal.
Extracts from BS 6644: 1991 are reproduced with the kind permission of BSI. Complete copies of the standard can be obtained by post from BSI Sales, Linford Wood, Milton Keynes MK14 6LE
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| 19 Air Supply and Ventilation |
19.1.3 (b) In the case of balanced compartment installation, air shall be supplied and discharged by means of a purpose designed (or proprietary) flueing/ventilation system based solely on high level permanent openings situated immediately adjacent to the flue outlet.
Commentary and Recommendations on 19.1.3 (b) For a balanced compartment installation, specialist advice should be sought from the system manufacturer and installation carried out in accordance with 19.2.6. |
19.2.6 Where a boiler, or boilers, is to be installed in a balanced compartment the installation shall comply with 19.2.7, 19.2.8 and 19.2.9.
Commentary and recommendations on 19.2.6 The balanced compartment is a method of installing an appliance, or appliances, in a closed compartment and arranging the flueing and ventilation so that some of the advantages of a balanced flue effect are achieved. The method is particularly suitable for boiler installations which are not adjacent to an outside wall, where provision of high and low level ventialtion is difficult because of structural arrangements or where a vertical balanced flue condition is required to avoid flueing problems. |
Commentary and recommendations on 20.5.1 The termination of the flue in a balanced compartment installation is not as critical as with an individual open installation. Appropriate advice should be available from the boiler manufacturer or, in the case of proprietary flueing/ ventilation system, the flueing/ventilation system manufacturer |
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