Technical Information product application guide - …

1 product application guide A Technical bulletin for engineers, contractors and students in the air movement and control Box 410 Schofield, WI 54476 Fax 2002 Greenheck Fan Corp. Suggested Air Changes for Good VentilationThe most common methodused to calculate cfmrequirements for a given fanor fans is based on completechanges of air in a structure orroom in a given time determine the cfm requiredto adequately ventilate anarea, divide the room volume(in cubic ft.) by theappropriate "Minutes per AirChange" as shown in the considerationswhen determining the numberof air changes are: Local code requirements onair changes Specific use of the space The type of climate in theareaIn the most severe conditionsselect the lower number (inthe series shown) to changethe air more moderate conditions,select the mid range. For lesssevere conditions in coolclimates, the higher numberwill provide Halls3 - 10 Attic2 - 4 Auditoriums4 - 15 Bakeries1 - 3 Banks3 - 10 Banquet Halls3 - 4 Bar/Lounge2 - 5 Barns10 - 15 Beauty Parlors2 - 5 Boiler Rooms2 - 5 Bowling Alleys2 - 8 Cafeteria3 - 5 Church4 - 10 Schools/Classroom4 - 6 Club Room3 - 7 Corridors/Halls6 - 20 Dairies, Creameries2 - 5 Dance Hall3 - 7 Dining Rooms3 - 6 Dormitories5 - 8 Dry Cleaners2 - 5 Engine Rooms1 - 2 Factories (Light)5 - 10 Factories (Heavy)2 - 6 Forge Shops1 - 3 Foundries1 - 4 Garages2 - 10 Generator Room2 - 5 Glass Plants1 - 2 Gymnasiums3 - 8 Type of SpaceMinutes perAir ChangeHeat Treat Rooms1 - 2 Hospital4 - 6 Kitchens2 - 4 Laboratory2 - 5 Laundries2 - 5 Locker Rooms2 - 5 Lodge Rooms3 - 5 Machine Shops3 - 5 Meeting Rooms4 - 6 Mill (General)3 - 8 Mills (Paper)2 - 3 Mills (Textile)

2 5 - 15 Office2 - 8 Packing Houses2 - 5 Plating Rooms1 - 5 Printing Plants3 - 8 Projection Room1 - 2 Recreation Rooms2 - 8 Residences3 - 6 Restaurants/Dining Rooms 3 - 7 Restrooms3 - 6 Retail Stores3 - 8 Ship Holds8 - 10 Shops (General)3 - 10 Theaters3 - 8 Transfer Room1 - 5 Transformer Rooms1 - 5 Tunnels6 - 10 Turbine Rooms2 - 6 Warehouses3 - 10 Type of SpaceMinutes perAir Chang