The evaluations were conducted by a joint two year study with Pami and the Manitoba Department of Agriculture under sponsorship from Energy Mines and Resources Canada, ENERDEMO program, and the Manitoba Department of Energy and Mines. The main purposes of the project were to demonstrate heat recovery as an energy conservation measure, and to evaluate the performance of commercially available HRV’s. Each HRV was installed and monitored in a livestock barn. Laboratory tests were also run. Each unit was evaluated and problems recorded.