Benchmarking energy performance for LEED residential homes in Manitoba

The work described in this paper focusses on energy performance and is part of an on-going POE (Post Occupancy Evaluation) for seventy two (72) homes built in three Manitoba cities according to LEED (Leadership in Energy and Environmental Design) standards. The POE includes assessments & benchmarking of Indoor Air Quality (IAQ) and Life Cycle Costing (LCC) in addition to the energy consumption. Energy consumption data for the units were retrieved from the billing records provided by the utility company (Manitoba Hydro). Statistical analysis tools were then used to compare the units´ consumptions with the levels known for typical homes as well as with design projected values. Using Regression Analysis, linear relations correlating actual monthly consumption ranges of all units and the projected values to average monthly temperatures and HDD (Heating Degree Days) were then developed. Using these relationships, statistical control charts were proposed as means of monitoring and ultimately establishing more realistic benchmarks for energy consumption of LEED homes.