The International Institute of Refrigeration (IIR) published two informatory notes on energy recovery: one on energy recovery in mechanical ventilation systems and the other on air-to-air energy recovery equipment.

The IIR informatory note on energy recovery in mechanical ventilation systems analyzes the possible energy, environmental and economic benefits of this technology according to the climate in which the building is located. It concludes that heat recovery in mechanical ventilation systems may reduce the usage of fossil fuel with payback periods of one or two years.

The IIR informatory note on air-to-air energy recovery equipment describes the performance, characteristics and operating modes of the range of appliances available for use in building ventilation heat recovery or in process-to-process industrial heat recovery. The energy benefits of heat recovery can allow energy cost reductions that can exceed 70 percent.