Investigated whether informational interventions, applied periodically might affect proenvironmental behavior change and long term maintenance of change of office occupants. The interventions targeted 2 heating-related behaviors that were tied to observable attributes of each individual office. Informational interventions were employed to promote 2 behaviors relevant for efficient heating of individual offices in a large office building. In 2 successive winter seasons, interventions were applied during 4-wk periods. Short-term effects were assessed weekly, and long-term effects were assessed 1 yr after each of the 2 intervention periods. Improvements were observed in each intervention period, with partial behavior maintenance 1 yr later. It is concluded that the changes observed in the individual offices across conditions are suggestive of the program's capacity to correct relapses in earlier proenvironmental behavior.