Building insulation is the most significant factor in deterring/retaining heat to reduce the energy consumption required to heat or cool a building while maintaining a comfortable internal temperature. Heating costs in the winter and cooling costs in the summer can be drastically reduced, provided that the necessary insulation improvements are made. 

The process itself is very cost efficient, not only for large buildings but also for residential homes. Insulation improvement will reduce the heat loss during the winter and prevent the heat from getting into the building in the summer. The larger the building, the greater the savings will be. The cost of the inspection becomes negligible. 

The images are from Saddle Lake Cree Nation energy audit inspection.