retrofitting

Going against the conventional wisdom, a builder in Colorado built-and sold more than 700 extra-energy-efficient homes. The homes' owners now spend half as much on space heating as their neighbors do.

This paper details a set of guidelines for the design of thermally efficient houses in the generally temperate climate of Greece, using the common construction materials of Greek contemporary housing and employing simple passive design techniques. The guidelines should be of use to the designers of climate sensitive housing in Greece. The relationship between heat capacity· levels of thermal insulation and size of openings are considered in detail. The Building Bioclimatic Chart devised by Givoni and the Energy Simulation Computer program ESP are the mai tools of the study.

This report on a project carried out at the Building Research Association of New Zealand describes an investigation on the role of draught sealing  measures in houses and is part of a wider programme concerned with overcoming heat and moisture problems in buildings.