Programs that offered several paths for customers to upgrade their homes—for example through a choice of single or bundled measures, staged upgrades over time, or a comprehensive whole home upgrade—were found to motivate greater homeowner participation and generate higher energy savings, according...

Some programs provide customers with a “certificate of completion” to recognize and reward homeowners’ accomplishment in completing an upgrade. Visible awards or affirmation, such as yard signs, window stickers, or favorable comparisons to neighbors can motivate homeowners to undertake upgrades...