applications is vital . For example , some hospitals as already |
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mentioned , but also in such applications as processing and |
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industrial facilities where toxic fumes may be present , flammable |
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gases or chemicals , laboratories , kitchen and food preparation |
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areas , extraction of various particulates such as overspray in |
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manufacturing , and more commonly , smoke extraction . |
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“ Smoke extraction , as part of a building ’ s ventilation system is |
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critical and is required in cases of emergency . BS EN 12101 – Part |
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3 , covers the emergency evacuation of smoke from a building |
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intending to allow occupants to escape with minimal harm . Any |
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building constructed now over a certain size must have a smoke |
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extraction system included by law . This particular element also |
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involves a significant number of fans that can be as much as 50 in |
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an installation ,” notes Murray Anderson , group national sales and |
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export manager at Elta Group Africa . |
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Ventilation ( and extraction ) systems can be configured in a |
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number of ways , depending on the design of the engineering |
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team and building setup . These can include systems per building |
||
level , one main system ducted to each level , and more recently |
||
plant rooms or service areas at different levels in a building |
||
catering to different building sections . As is common today |
||
mixed-use buildings have become an increasingly popular client |
||
request and this results in varying ventilation functions . |
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Basements are another area where air change ( specifically |
||
extraction ) is required and can include sensors to monitor carbon |
||
monoxide or smoke levels . Sensor technology can also aid in |
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energy consumption as impulse fans can operate only when |
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www . hvacronline . co . za |
RACA Journal
I June 2021
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13 |