Nazaroff W W, Offermann F J, Robb A W
Bibliographic info:
Health Physics, August 1983, Vol 45, No 2

The Aardvark automated system has been developed for continuously measuring the air-exchange rate and 222Rn (radon) concentration in an occupied residence. The air-exchange rate is measured over 90 min intervals by tracer gas decay using sulphur hexafluoride as the tracer gas.