References: 1. C.Gallo, M.Sala, A.M.sayigh Architecture: Comfort and Energy_Elservier science Ltd, Kidlington, Oxford OX5 1GB,UK 2. Charles Correa, Housing and Urbanisation, The Urban design Research Institute, Bombay, India, 7999 3. Colombo Metropolitan Regional Structure Plan (CMRSP), Vol. 1,Urban Development Authority, Colombo, Sri Lanka, 1998. 4. DEROB-LTH for MS Windows, User Manual Version 99.01+3, Department of Building Science, Lund Institute of Technology, Sweden. 5. Evans, M. House climate and comfort. The architectural press, London, 1990. 6. Fanger, P.O. Thermal Comfort, Analysis and Application in Environmental Engineering, Danish Technical Press, Copenhagen, Denmark, 1970. 7. Givoni, B. Man climate and architecture. 2nd edition. Barking, Essex: Applied science, 1976. 8. ISO 7730, Moderate thermal environments - Determination of the PMV and PPD indices and specification of the conditions for thermal comfort, 2nd edition, 1994-12-15, Reference number ISO 7730:1994(E). 9. Koiengsberger, O.H. Manual of tropical housing and building. Part one. Climatic design. Longman, London, 1973. 10. Olgyay, V. Design with Climate: bio climatic approach to architectural regionalism. Princeton, NJ: Princeton university press, 1963. 11. Ronald Lewcock, Babara Sansoni The Architecture of an Island-The Living Legacy of Sri Lanka, Barefoot Pvt. Ltd, Colombo, Sri Lanka, 1998. 12.Rohinton Emmauel, Ph.D. Urban heat island and cooling load. The case of an equatorial city. Architecture Energy and Environment, ppl6:l- 16:8,1999, 13. Statistical Abstract J999-S/7 Lanka, (CD), Department of Census angl statistics, Ministry of finance and Planning, Sri Lanka, 2000. U.Urban Development Authority (UDA),( 1999), City of Colombo Development Plan, volume 1&2, Ministry of Housing and Construction, Colombo, Sri Lanka. \ j 73