- Calculate Size of Ventilation Fan for Bathroom of 10 Foot Long,15 Foot width and 10 foot height .
Calculation:
- Area of the Room=Length x Width x Height
- Area of the Room=10 x 15 x 10 =1500 Cub. Foot
- From the table Air Changing Rate (ACH) for Bathroom = 8 Times/Hour.
- Size of Ventilation Fan = (Area of Room x ACH ) / 60
- Size of Ventilation Fan = (1500 x 8 ) / 60 = 200 CFM
-
Size of Ventilation Fan = 200 CFM
| Recommended Air Change Rates For Room (ACH) | ||
| Type of Room | Air Change Rate /Hour | Consider |
| Shower Area | 15 To 20 | 20 |
| Bathroom & Shower Rooms | 15 To 20 | 15 |
| Bathroom | 6 To 10 | 8 |
| Bedrooms | 2 To 4 | 4 |
| Halls & Landings | 4 To 6 | 5 |
| Kitchens | 10 To 20 | 15 |
| Living & Other Domestic Rooms | 4 To 6 | 5 |
| Toilets – Domestic | 6 To 10 | 8 |
| Utility Rooms | 15 To 20 | 15 |
| Cafés | 10 To 15 | 15 |
| Canteens | 8 To 12 | 10 |
| Cellars | 3 To 10 | 6 |
| Changing Rooms with Showers | 15 To 20 | 15 |
| Conference Rooms | 8 To 12 | 8 |
| Garages | 6 To 10 | 8 |
| Hairdressing Salons | 10 To 15 | 13 |
| Hospital Wards | 6 To 8 | 7 |
| Laundries & Launderettes | 10 To 15 | 13 |
| Meeting Rooms | 6 To 12 | 7 |
| Offices | 4 To 6 | 6 |
| Restaurants & Bars | 10 To 15 | 12 |
| School Rooms | 5 To 7 | 6 |
| Shops | 8 To 10 | 9 |
| Sports Facilities | 4 To 6 | 6 |
| Store Rooms | 3 To 6 | 5 |
| Workshops | 6 To 10 | 8 |
| Assembly rooms | 4 To 8 | 8 |
| Bakeries | 20 To 30 | 25 |
| Banks/Building Societies | 4 To 8 | 5 |
| Billiard Rooms * | 6 To 8 | 5 |
| Boiler Rooms | 15 To 30 | 25 |
| Canteens | 8 To 12 | 10 |
| Changing Rooms Main area | 6 To 10 | 8 |
| Changing Rooms Shower area | 15 To 20 | 17 |
| Churches | 1 To 3 | 3 |
| Cinemas and theatres * | 10 To 15 | 12 |
| Club rooms | 0.12 | 0.12 |
| Compressor rooms | 10 To 15 | 15 |
| Conference rooms | 8 To 12 | 12 |
| Dairies | 8 To 10 | 10 |
| Dance halls | 0.12 | 0.12 |
| Dental surgeries | 12 To 15 | 15 |
| Dye works | 20 – 30 | 30 |
| Electroplating shops | 10 To 12 | |
| Engine rooms | 15 To 30 | 30 |
| Entrance halls & corridors | 3 To 5 | 5 |
| Factories and workshops | 8 To 10 | 10 |
| Foundries | 15 To 30 | 20 |
| Glasshouses | 25 To 60 | 50 |
| Gymnasiums | 0.6 | 0.6 |
| Hospitals – Sterilizing | 15 To 25 | 20 |
| Kitchens – Domestic | 15 To 20 | 15 |
| Kitchens – Commercial | 0.3 | 0.3 |
| Laboratories | 6 To 15 | 12 |
| Lavatories | 6 To 15 | 12 |
| Lecture theatres | 5 To 8 | 8 |
| Libraries | 3 To 5 | 4 |
| Mushroom houses | 6 To 10 | 8 |
| Paint shops (not cellulose) | 10 To 20 | 15 |
| Photo & X-ray darkrooms | 10 To 15 | 12 |
| Public house bars | 0.12 | 0.12 |
| Recording control rooms | 15 To 25 | 20 |
| Recording studios | 10 To 12 | 10 |
| Shops and supermarkets | 8 To 15 | 12 |
| Squash courts | 0.04 | 0.04 |
| Swimming baths | 10 To 15 | 12 |
| Welding shops | 15 To 30 | 20 |
September 03, 2017 at 10:02PM
