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https://www.span.gov.my/article/view/permit-structure

Weissburg, J. (2023, January 10). The design-build construction method: Advantages and drawbacks. Billd.   

           https://billd.com/blog/design-build-construction/#:~:text=The%20major% 20benefits%20 of%20Design,    

            the%20best%20and%20quickest%20turnaround.

Ashokan. A. (n.d). Testing Commissioning of HVAC System.

https://www.scribd.com/document/513606395/Testing-Commissioning-of-HVAC-System#

Cyril Air, I. (2023, May 5). Pressure testing. Cyril Air Conditioning, Heating and Refrigeration.    

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           efficient%2C%20and%20leak%2Dfree.

Air Fixture. (2022, January 25). What is plenum in HVAC?.  

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Crown Power. (2021, July 1). Guide to installing a ducted air conditioning system. 

   https://www.crownpower.com.au/blog/installation-ducted-air-conditioning/