Without an incentive, homeowners and contractors may limit themselves to smaller upgrade projects. Programs in search of more energy savings have found that some homeowners already interested in an upgrade are amenable to a bigger upgrade when coupled with better financing terms or larger rebates...

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...