Africa ’ s only monthly publication serving the HEVAC & R sectors

ISSN 1812-772X

ISSN 1812-772X

March 2023 I Vol 39 No 1

PUBLISHER DETAILS

PUBLISHED BY INTERACT MEDIA DEFINED ( PTY ) LTD 13A Riley Rd , Bedfordview 2009 , South Africa PO Box 695 , Edenvale , 1610 Tel : + 27 ( 0 ) 11 579 4940 | Web : www . interactmedia . co . za

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ADVERTISING EXTERNAL SALES Dale Macnamara | sales @ interactmedia . co . za Zeldalee du Toit | zeldalee @ interactmedia . co . za

SUBSCRIPTIONS : Maxlee Marange | mmarange @ interactmedia . co . za Ralph Shongwe | ralph @ interactmedia . co . za

SUB-EDITOR : David Smith | david @ interactmedia . co . za

DESIGN AND LAYOUT : Glyniss Bone | glyniss @ interactmedia . co . za PROCESS COORDINATOR : Lebo Bucibo | lebo @ interactmedia . co . za

REGULAR CONTRIBUTORS Grant Laidlaw , Barney Richardson and Michael Young

ADVISORY COMMITTEE Grant Laidlaw , John Parry , Pat Burke , Graeme Page and Willem van der Westhuizen

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When measurement matters

Jul - Sept 2022 Print : 2 879 Online : 3 926

NEWS 3 AECOM South Africa sees exponential growth in data centre market 5 ACRA helps students to be water wise with new cleaning techniques 7 International Day of Women and Girls in Science initiative

INTERNATIONAL NEWS 8 Panasonic to buy Systemair ’ s commercial AC business 9 Heat pumps “ indispensable ” to cut emissions

WOMEN IN BUILT 21 The price of inferior service

FEATURES 23 Humidifiers demistified

PROJECTS 34 Pretoria CBD retailer gives 50-year old HVAC system a refurb

CONTRIBUTORS 41 Welcome to the solutions page

BUSINESS 45 Shifting the paradigm toward efficiency and cost-effectiveness 47 Buildings and climate change – there is a massive contribution to be made

TECHNICAL 48 Nanotechnology for better refrigeration heat transfer

34

Pretoria CBD retailer gives 50-year old

HVAC system a refurb

RACA Journal I March 2023

Heating | Energy | Ventilation | Air Conditioning | Refrigeration

NEWS ACRA helps students to be water wise with new cleaning techniques

EVENTS AND EXHIBITIONS Announcing the new Frigair

FEATURE Humidifiers demistified

www . refrigerationandaircon . co . za

PROJECT 50-year old HVAC system gets a refurb

Cover Credit : Eamonn Ryan