PHOENIX FANS

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Axial Selection Curves

Air Change Chart

INFORMATION ON AIR CHANGES

Recommended air changes per hour
(Statutory Ordinances Bye-Laws must be complied with)

SITUATION	Air Changes per Hour	SITUATION	Air Changes per Hour	SITUATION	Air Changes per Hour
Assembly Halls Bakeries Banquet Halls Billiards Rooms Boiler Houses Cafes & Coffee Bars Canteens Cinemas Club Rooms Churches Dance Halls Dye Works Engine Rooms Factories Workshop Fish & Chips Shops	4 - 6 20 - 30 6 - 10 6 - 8 20 - 30 10 - 12 4 - 6 10 - 15 8 - 10 6 - 10 6 - 8 20 - 30 15 - 30 6 - 10 15 - 25	Foundries Furnace Shops Glasshouses Garages Hospitals:General Wards Hairdressing Salons Hotel Bars Kitchens (Comm or School) Kitchens (Domestic) Laboratories Lavatories Laundries Lecture Theatres Laundrettes Libraries	20 - 30 30 - 60 45 - 60 6 - 8 4 - 6 10 - 15 4 - 6 15 - 20 10 - 15 4 - 6 10 - 15 20 - 30 6 - 10 10 - 15 3 - 4	Mushroom Houses Offices Paint Shops Photography Darkrooms Pig Houses Poultry Houses (Deep Litter) Public Toilets Restaurants School Classrooms Swimming Baths Shops - Supermarkets Shops - Warehouses Theatres X-Ray Darkrooms	10 - 20 4 - 6 30 - 60 10 - 15 6 - 10 6 - 10 5 - 10 6 - 10 2 - 3 20 - 30 8 - 10 3 - 6 10 - 15 6 - 8

ALTITUDE ABOVE SEA LEVEL OF MAIN CENTRES IN THE REPUBLIC OF SOUTH AFRICA

Name of Town	Alt (m)	Name of Town	Alt (m)	Name of Town	Alt (m)	Name of Town	Alt (m)
Barbeton Bethal Bloemfontein Blyvooruitzicht Brits Cape Town Delmas Dundee Durban East London Germiston Harrismith Johannesburg Kimberley	877 1700 1426 1524 1150 5 1600 1250 6 46 1665 1622 1753 1223	Klerksdorp Kriel Kroonstad Kuruman Ladysmith Louis-Trichardt Lydenburg Machadadorp Middelburg-(Mp) Mooi River Nelspruit Newcastle Paarl Parys	1324 1610 1369 1113 1000 950 1470 1707 1515 1390 670 1187 123 1416	Pelindaba Phalaborwa Pietermaritzburg Pietersburg Port Elizabeth Potchefstroom Pretoria Randfontein Richards Bay Rossing Sasolburg Sasol 11 Sishen Standerton	1380 410 671 1293 5 1350 1400 1770 50 564 1500 1600 1200 1531	Stellenbosch Umtata Upington Vanderbijlpark Vereeniging Volksrust Vryburg Vryheid Welkom Westonaria Windhoek Witbank	111 700 814 1463 1448 1655 1187 1180 1376 1707 1728 1622