A unit of ventilation, describing the rate at which polluted indoor air is mixed with outdoor air. One decipol obtains when indoor air that is being polluted at a rate of 1 olf is diluted with 10 liters per second of unpolluted air. The unit was introduced in 1988 by Povl Ole Fanger (1934 –2006).

P. O. Fanger.
Introduction of the olf and decipol units to quantify air pollution perceived by humans indoors and outdoors.
Energy and Buildings, vol. 12, pages 1-6 (1988).

C. E. Aizlewood, G. J. Raw and N. A. Oseland.
Decipols: Should we use them?
Indoor Built Environment, vol. 5, pages 263-269 (1996).

2009 ASHRAE Handbook. Fundamentals (SI).
Atlanta, GA: American Society of Heating, Refrigerating and Air-conditioning Engineers, 2009.

Page 12.6.


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