1. Natural Resources Canada, R-2000 homes. 〈http://www.nrcan.gc.ca/energy/efficiency/housing/new-homes/5085.〉, 2014 (retrieved 20.06.14.).
2. Heat Recovery Ventilators,2012
3. Onset of freezing in residential air-to-air heat exchangers;Fisk;ASHRAE Trans.,1984
4. Performance of residential air-to-air heat exchangers during operation with freezing and periodic defrosts;Fisk;ASHREA Trans.,1985
5. Mechanical ventilation with heat recovery in cold climates;Jesper,2005