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...

Homeowners do not benefit from access to financing if they don’t know about or understand options available to them. Contractors are often the primary transaction point for selling upgrades, and many programs have found that ongoing collaboration with contractors through sales training, regular...

Programs found that encouraging word of mouth outreach by asking satisfied customers to promote their program experience to peers helped attract more homeowners who completed energy upgrades. Referrals from neighbors and friends who are happy with their energy improvements can provide a good source...