61.   Several former employees said it took years for the company to install air locks, ventilation systems and changing rooms to seal off the beryllium room.

62.   Smoke, he explained, can drift into other apartments through ventilation systems.

63.   Still, I headed off any potential problem by redesigning the ventilation system.

64.   Successful indoor grilling demands a good kitchen ventilation system.

65.   Subsequent steps to placate the workers included overhauling the ventilation system and keeping the workers away from photocopiers and carbonless paper, which they also claimed made them sick.

66.   That is the point at which the federal government recommends installing ventilation systems or taking other action to reduce radon.

67.   Tests on filters taken from the air ventilation system came back negative, although the results of dozens of other tests were still not available as of Wednesday evening.

68.   That means adjusting the ventilation system so that the interior pressure is slightly higher than in the surroundings.

69.   The aging ventilation system, famous for belching soot onto the carpets, has been ripped out.

70.   The air in enclosed cages is kept fresh with ventilation systems, and some of the animals get sprayed regularly by timed water misters.