​​​Recently, government agencies and electric industry stakeholders have considered the effectiveness of whole home replacements for inefficient manufactured homes as opposed to the more traditional energy-efficiency measures on the existing homes. In what situations is manufactured home replacement more cost-effective than other efficiency improvements such as weatherization? This paper provides an update on NRECA’s prior reports on manufactured home weatherization opportunities, presents weatherization efforts undertaken by several co-ops, and explores funding mechanisms that can be used to implement these improvements.