Heat is the process of energy circulation and replacement of air from hot to cold. In tropical climates, more heat is received because of the location of Malaysia of the equatorial line. Excessive heat in buildings causes discomfort to the occupants in tropical climate. Tropical rainforest climate receives higher solar radiation and terrestrial radiation reaching the building envelopes contributes to this problem. The design of the building should be more concern on reducing this heat. This paper provides a review of heat contribution in a terraced house indoor environment for tropical climate. A good comfortable home is part of the sustainable development agenda to improve the quality of life. Terraced houses are the most living quarters in mass living scheme for urban areas. The incoming solar energy from the sun into the building surface cannot be changed, therefore a consideration of passive building design need to be applied in terraced house design. Data collection gathered from this literature survey will assist to identify problems of discomfort occupant. This strategy would assist in improving the building industry in promoting sustainable development in Malaysia. 3 0101 4 4 0101 This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kenaf Fibrous Pulverised Fuel Ash Concrete (KFPC) is a green concrete that using the plant fibre in order to enhance the strength and durability of composite material in an aggressive environment. Four mixes of concrete were prepared to compare the performance of concrete in an acidic environment which are Ordinary Portland Cement (OPC) samples, Kenaf Fibrous Concrete (KFC) using OPC, PFA concrete samples and KFPC. The 25mm length and 0.75% of kenaf fibre and 25% of Pulverised Fuel Ash of cement replacement were used for the study. The objective of the study is to investigate the compressive and flexural strength of KFPC in 365 days of sulfuric acid immersion. The mass loss result shows the degradation of concrete in acid was improved with the inclusion of pozzolana material. Kenaf Fibre has increased the tensile strength of concrete and the addition PFA enhances the durability. The microstructural analysis through SEM and EDX analysis has been carried out to examine the condition of fibre in concrete. The results showed that a significant loss of strength and mass due to the duration of immersion, however, KFPC has contributed the better performance in an aggressive environment.