Calculate Size of Ventilation Fan

  • 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
 
 
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About Jignesh.Parmar
Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical) from Gujarat University. He has more than 14 years experience in Power Transmission-Power Distribution-Electrical energy theft detection-Electrical Maintenance-Electrical Projects(Planning-Designing-coordination-Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He is Freelancer Programmer of Advance Excel and design useful Excel Sheets of Electrical Engineering as per IS,NEC,IEC,IEEE codes. He is technical Author for "Electrical Mirror" and "Electrical India" Magazines. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.

3 Responses to Calculate Size of Ventilation Fan

  1. Satish tiwari says:

    Very valuable information jignesbhai thanks for sharing.

  2. mehtab saleem says:

    than x alot On Sep 3, 2017 9:33 PM, “Electrical Notes & Articles” wrote:

    > Jignesh.Parmar posted: ” 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) ” >

  3. aaaa1828 says:

    Very good informative. We expect more

    On 3 Sep 2017 22:03, “Electrical Notes & Articles” wrote:

    > [image: Boxbe] This message is eligible > for Automatic Cleanup! (comment-reply@wordpress.com) Add cleanup rule > > | More info > > > Jignesh.Parmar posted: ” 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) ” >

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