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The green deal trial monitoring project

The Green Deal Trial Monitoring Project being carried out on behalf of the Department for Energy and Climate Change (DECC) is investigating the impact of sustainable retrofits on the performance of homes and outcomes for occupants.  We are partnering with the Greater Manchester Low Carbon Hub which works with 10 local authorities and social housing providers in the region.


The Green Deal Trial Monitoring Project breaks from the practice of using models, such as RdSAP, by investigating actual performance of improved homes, the impact on occupants, and some of the associated risks of sustainable retrofit.

What we are doing:

  • Monitoring internal conditions and rate of energy use, using wireless sensors  
  • Conducting a series of interviews with occupants to assess comfort levels  
  • Measuring the rate of heat flow through the walls (U value testing)  
  • Using infrared images to assess the performance of the whole building and identifying patterns of heat loss  


The study is ongoing, the initial findings are:

  • Sustainable retrofit to one part of the sample triggered a 50% improvement in performance  
  • A post-retrofit study of occupants highlighted a considerable improvement in their newly-improved properties.

Green deal trial monitoring projectDECC logo