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How do you solve a persistent problem like low realization rates for weatherization? Dig in deeper.

Massachusetts Electric and Natural Gas Program Administrators

Home Energy Services – Weatherization Realization Rate Assessment

On the heels of a second straight impact evaluation reporting low realization rates for the Home Energy Service program’s key measure – insulation – the Massachusetts Program Administrators turned to Cadeo for help. The program administrators wanted to know why the realization rates were not closer to 1.0 and, most importantly, how to close the persistent gap between ex ante and ex post savings. Cadeo, which had led the previous HES impact evaluation as a subcontractor to Guidehouse, approached the challenge by diving deep. We reviewed vendor models and meet with their modeling team, interviewed the assessors that use the tools, interviewed participants, and undertook a comparative analysis of modeled and actual consumption to determine if the disparity was more acute for certain customer and/or building types. Collectively, these tasks provided insights into the likely contributors to the historical realization rate issues and allowed Cadeo to identify specific steps to improve future realization rates.


Cadeo helps our clients identify opportunities for immediate and long-term success through accurate and thoughtful impact and process evaluations.