Projects
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The dual functions on the smoke exhaust systems
shall be PLC controlled using fire rated motorised
damper systems and shall form part of the HVAC
contract.
In case of a fire situation the retail shops shall be
protected from each other by means of fusible link
fire dampers, in cases where the ducting of adjacent
shops or offices are joined up.
FA ventilation shall be provided with a combination of
DX fresh air fan filter units and fan coil heat recovery
type fan filter units. Where there is enough AC spaces
involved the exhausted air will be ducted to an
enthalpy wheel type heat recovery unit for energy
recovery and pre-treatment of the fresh air supply.
The FA makeup system for the kitchen hoods shall be
equipped with an evaporative cooling intake system
to incorporate an evaporative cooling effect into the
building so as to reduce the heat load from ambient
air during the summer months.
Extraction shall be provided in certain areas by means
of localised and centralised extraction systems.
The toilet blocks shall be provided with separate
extraction systems and the control of the fans by
means of a building management system (BMS)
controllers shall form part of the HVAC installation.
Weather louvers shall be provided in the outside walls
to ensure adequate fresh air. Door grilles shall also be
provided to each area where extraction is provided.
All wall and door louvers will be done by others.
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SYSTEM DESCRIPTION
As the Facility will have stalls that function independently,
the HVAC billing thereof (electricity) also had to take this
into account. The office areas shall be separately billed
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The kitchen fan and extractor.
The exhaust smoke extractor fans installed on each floor
of the facility.
The ducting that will transport exhaust smoke outside.
This is also the area the buses and taxis will use.
www.hvacronline.co.za
RACA Journal I February 2020
39