Convention 3.08 - Strongly Ventilated Spaces
Posted by Mike Gordon on 22 July 2015 09:43 AM
Where ventilation specifications are available, strongly ventilated spaces shall be defined as such in accordance with the table above:
iSBEM User Guide (February 2012) : Table 9: Options for ‘Connects space to’ field for envelopes
Note that a strongly ventilated space is an alternative to an unheated adjoining space only and is not selected in any other circumstances. Where appropriate ventilation specifications are unavailable, a zone will be considered to be a strongly ventilated space if it is unheated and is one of the following:-
1. Any part of the building being assessed that is identified with the activity of ‘car park’
2. Any non-heated/cooled industrial process area that has mechanical extraction/ventilation serving the whole of the zone in order to accommodate the on-going processes.
3. Any area that has deliberate fixed openings in order to provide significant natural ventilation, e.g.:
a. A plant room with louvered doors / vents for provision of combustion air
b. A naturally ventilated internal, underground or basement store area with fixed openings
Note that windows that are left permanently open are not categorised as fixed openings. If in any doubt, the assessor is to assume the presence of a strongly ventilated space as a worst case default position. Site notes/evidence to be provided accordingly.