Page 97 - B8773-AEW-XX-XX-PP-A-0001_[P8]_Contractors Manual

4.7.3 Fresh Air Supply
The supply air installation shall take the form of At the conclusion of the installation, the HVAC
a suitable inlet louvre with bird/rodent guard contractor shall fully commission the entire
and sized on a min. free area of 50% and max. system including both duct systems and the
velocity of 2.5m per second. The system shall be gas safety interlock, and shall check by on-site
complete with a fresh-air filter to EU4 standard, measurement that the airflows are within his
an axial flow fan, and a range of ductwork appropriate designed parameters.
terminating in ceiling mounted diffusers, with
integral dampers accessible through the The ventilation of internal toilets shall be
diffuser face, and finished to match the ceiling controlled by the light switch, being interlinked
colour. The fresh-air systems shall be designed with the extract fan timer. Internal offices shall
to replace approximately 80% of the extract air have a further fresh air supply, either with
volume. independent control or as part of the supply air
system.
Internal ceiling grilles in the Bake & Serve and
Customer area’s MUST be sprayed to RAL 7037 For specific ventilation requirements please refer
(matt finish) to match the grey ceiling colour. to the oven manufacturers recommendations.
Grilles in other areas must match ceiling colour.
O&M manuals must be provided by the Principal
As part of the initial installation, the HVAC Contractor on project handover.
contractor shall include a nominal 12 months
supply of replacement fresh air filters.

The design of the system must take into account
the requirement for approved specialist
cleaning contractors to be able to change
the fresh air filters on a regular basis. The fresh
air filter must be located in an accessible
position, and orientated so that the cleaning
contractors are able to access the filters easily,
including positioning so that the access panel is
not obstructed by walls, ceilings, pipework, etc.
and that there is sufficient space in front of it for
the replacement panel. Liaison with the main
contractor to achieve this will be required.

Both exhaust ductwork outlet and fresh-air inlet
points shall be located to minimise short circuiting
so that exhaust air cannot be drawn back into
the building through openable windows etc.

4.7.3 Fresh Air Supply 3 September 2018