Dry filters are usually made in standard units of definite rated capacity and resistance to the passage of air. At the time the installation is…
Author: admin
The dust removed in the filters may be classified as poisonous, infective, obstructive, or irritating and may originate from an animal, vegetable, mineral, or metallic…
The effect of dust on health has been properly emphasized by competent medical authorities. The normal human breathes about 17 times a minute. The air…
Air ducts may be designed with either a round or a rectangular cross section. The radius of elbows should preferably be at least 1.5 times…
The volume of air required is determined by the size of the space to be ventilated and the number of times per hour that the…
Mechanical ventilation differs from natural ventilation mainly in that the air circulation is performed by mechanical means (such as fans or blowers). In natural ventilation,…
Table 3-1 is a guide to the amount of air required for efficient ventilation. This information should be used in connection with the ventilatorcapacity tables…
Several factors must be taken into consideration in selecting the proper ventilator for any specific problem: ? Mean temperature difference ? Stack height (chimney effect)…
The two natural forces available for moving air through and out of buildings are wind forces and temperature difference between the inside and the outside.…
Air leakage caused by cold air outside and warm air inside takes place when the building contains cracks or openings at different levels. This results…