A system of ventilation in which air is forced through ventilation ducts under pressure.


Related Terms

LOUVER

1. An opening in a wall or ceiling with slanted or sloping slats to allow sunlight and ventilation and exclude rain; may be fixed or adjustable, and may be at the opening of a ventilating duct. Also known as outlet ventilator. 2. Any arrangement of fixed or adjustable slatlike openings to provide ventilation.

HONEYCOMB WALL

A brick wall having openings created either by allowing gaps between stretchers or by omitting bricks and used to support floor joists and provide ventilation under floors.

VENTILATION

The positive changing of air within a compartment or space, whether produced by natural or mechanical means, through a system of air outlets, exhaust and ducts to induce a flow of air through the compartment or space.

ELVENT

Electric Ventilation

METHYL BROMIDE

A popular fumigant used to kill any actual or potential infestations in timber, lumber, grain, and other commodity shipments. Entry into any treated space should only occur after adequate and complete ventilation or with proper breathing apparatus.

COWLS

bell shaped fitting serving as deck opening to ventilation ducts.

AIR LEAKAGE

1. In duct work, air which escapes from a joint, coupling, and such. 2. The undesired leakage or uncontrolled passage of air from a ventilation system.

AIRWAY

A passage for ventilation between thermal insulation and roof boards.

ASPIRATION THERMOGRAPH

A thermograph in which ventilation is provided by a suction fan.

ASPIRATION PSYCHROMETER

A psychrometer in which the ventilation is provided by a suction fan.

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