Air Changes Per Hour

Building Type  ACH Ranges Average ACH
Beater Room 30 30
Boiler Room 30 – 60 45
Bottle Pasteurizing 20 – 30 25
Box Annealing 20 20
Breweries Fermenting Room 20 – 30 25
Compressor 15 – 20 17.5
Dye Houses 10 – 15 12.5
Electric Furnace 60 – 120 90
Engine Room 30 30
Forge Shop 35 35
Foundry – Core Rooms 40 – 60 50
Foundry – Cupola Building 30 – 40 35
Foundry – Moulding Section 20 – 30 25
Foundry – Pouring Section 20 – 30 25
Galvanizing Room 15 – 20 17.5
Gas Producer Building 10 -20 15
Generating Room 20 20
Glass Furnaces 60 – 120 90
Glass Plant 30 – 60 45
Heat Treating Room 60 – 120 90
Keg Washing & Storage 8 – 12 10
Machine Shop 10 – 15 12.5
Oil Refineries – Pump House 15 – 20 17.5
Packing, Meat – Slaughter House 5 -10 7.5
Packing, Meat – Smoke House 30 30
Paint Spray Area 60 – 90 75
Paper Mill 20 20
Pickling – Continuous 10 – 15 12.5
Pickling, Open Type 40 40
Steel Furnace Building 45 45
Sugar Mill – Main Building 15 – 20 17.5
Sugar Mill, Battery and Press 15 15
Textile Mill 10 – 15 12.5
Transformer Room 30 30
Turbine Room, Electricity 15 15
Warehouse 4 – 5 4.5
Zinc Smelting Building 60 60