Exhaust Fan Sizng Spreadsheet
The excel spreadsheet provides information on calculating the size of a ventilation fan for a toilet room and recommended air change rates for different types of rooms. It gives the size of the toilet room as 4m length, 8m width, 3m height, and 96 cubic meters, with a required fresh air exchange rate of 8 times per hour. Based on this, it calculates the required size of the ventilation fan as 768 cubic feet per hour (CFH). it then recommends a 200/8″ fan. also provides a table with recommended air change rates per hour for different room types, and a table with standard exhaust fan sizes.
Reference: https://en.wikipedia.org/wiki/Axial_fan_design
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Title : exhaust fan size calculator
Type : Microsoft Excel Spreadsheet (xlsx)
Size : 40.1 KB
FAQ:
How to measure exhaust fan size?
Exhaust Fan Size Chart: How to choose the right one
The size of an exhaust fan is measured in terms of its sweep (the diameter of the fan blades) and its air displacement capacity, which is typically measured in cubic feet per minute (CFM). The larger the room or area you need to ventilate, the higher the CFM rating you’ll require.
How to calculate axial fan capacity?
The calculation and design of an axial fan for a blower or aeraulic ventilation system, is to dimension the diameter of the fan, the number of blades, the speed of rotation, the hub diameter and the twisting of the blades as a function of delta total pressure of the fan to be provided to compensate for pressure losses.
What is the formula for CFM?
HVAC professionals use this formula: CFM = Room Area (sq. ft.) x Ceiling Height (ft.) x ACH / 60(mins).
