ventilation

Another challenge airports face is upgrading their ventilation systems.

More research will be needed to determine how characteristics such as ventilation influence pollution levels and where exactly the particles originate from, Gordon says.

On Monday, some Philadelphia teachers were called in to school buildings for professional development, but they refused because of concerns over classroom ventilation.

You have to have ventilation systems that have been reworked.

Protect your eyes, too, and work where there is abundant ventilation.

It is provided with best conditions for water supply, heating and ventilation.

He chose a corner spare room with good ventilation, and put aside a spare set of sheets and silverware, just in case.

They steer me toward what looks like an ad agency's conference room—featuring exposed concrete and ventilation systems.

These doors are an important part of the ventilation system.

For starters, it would have higher entrances and ventilation grates, says MTA spokesman Adam Lisberg.

A little ventilation, he declared, was something a man's system needed every year or two.

There are some houses into which one can never enter with impunity, from the want of due ventilation.

At the level of the ground there should be a course of hollow vitrified brick to exclude dampness and to give ventilation.

In 1842 the medical officer of the union is required to report to his board any defects in drainage, ventilation, and warmth.

An open fireplace in a room aids in ventilation because of the constant draft up the flue.