In 1990, Seattle City Liight reported the initial round of findings about electricity savings from
participants in the first two years of the Multifamily Conservation Program. Subsequent analysis
continued, addressing issues surronding the weather-normalization methodology and the cost-effectiveness
of the current program.

This paper reports on outcomes from 111 buildings (1,449 units) that participated in the program during
1986 and 1987, providing comparisons with 95 pre-participant buildings (1,365 units) to derive. estimates
of net energy savings in 1987 and 1988. Extrapolations to impacts of the 1990 program are made to
reflect ongoing changes in window technology.