Tag Archives for HVAC Ventilation

HVAC Ventilation Air Volume

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 air in the space is to be changed. Table 3-4 shows the recommended rate of … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Duct-System Resistance

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 pipe diameter for round pipes, or the equivalent round pipe size in the case … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Volume of Air Required

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 air in the space is to be changed. In many cases, existing local regulations or … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Fresh-Air Requirements

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 provided by fan manufacturers to assist in the proper selection of the number and size … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Ventilator Capacity

Several factors must be taken into consideration in selecting the proper ventilator for any specific problem: ? Mean temperature difference ? Stack height (chimney effect) ? Induction effect of the wind ? Area of ventilator opening Of several other minor … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Natural Ventilation

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 movement may be caused by either of these forces acting alone, or by a … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Air Leakage

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 in the cold and heavy air entering at low levels and pushing the warm and … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: , | Leave a comment

HVAC Ventilation Requirements

Ventilation is produced by two basic methods: natural and mechanical. Natural ventilation is obtained by open windows, vents, or drafts, whereas mechanical ventilation is produced by the use of fans. Thermal effect is possibly better known as flue effect. Flue … Continue reading

04. January 2011 by admin
Categories: Ventilation Requirements | Tags: | Leave a comment