The thermally renovation method for built houses is expected to contribute to the global warming prevention. In this paper the analyzed results of the indoor thermal environments during heating season and annual energy consumption in four detached houses before and after the retrofit were presented. In particular, non energy benefit (NEB) could be useful for the evaluation of cost benefit after renovation. It is said that there are three kinds of renovated methods for improvement of thermal performance on the envelopes in according with the width of insulated area. This paper focuses on the environmental improvement of houses through the whole and partial renovation method.
