Technical Booklet L Combustion Appliances and Fuel Storage Systems·Page 58·4.10
Ventilation for flueless gas appliances
Flueless gas appliances require ventilation provision in accordance with Table 4.1, which may include permanently open air vents and/or rapid ventilation as recommended in BS 5440: 2.
The ventilation for a flueless gas appliance should be provided in accordance with Table 4.1. For some flueless appliances, it may be necessary to provide permanently open air vents and/or make provision for rapid ventilation as recommended in BS 5440: 2.
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