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Roof Ventilators

Roof Ventilators
Roof Ventilators
Product Code : 04
Product Description
Roof Ventilators
  • Size: 28" Net Dia & 21" throat Dia
  • Weight: 6.5 Kg approx
  • Technology: PTFEe Bushing ( noiseless)
  • Blades: 36 Nos. 0.5mm Aluminum Blades
  • Frame: MS galvanized
  • Top Cover: Stainless Steel
Note: Available in Aluminum, Stainless Steel, Powder Coating / Anodizing will be on request.

Salient features
  • Air Power Ventilator's vane are manufactured from high grade aluminium including the rivets and therefore highly resistant to atmoshperic corrosion.
  • No power involved for its operation as its movement is controled by natura wind movement / hot air draft (Thermos Syphoning).
  • The vane's are profiled and rolled to provide strong blade with good aerodynamic performances.
  • Air Power Ventilators are light in weight and hence operational at very lightly wind speeds.
  • Since no power involved for its operations, no recurring charges in terms of electricity.
  • The vane design and the centrifugal action prevent rain water from entering the ventilator.
  • Designed to be fitted easily on asbestos, galvanized, iron and aluminium roofs.Assured ventilation for 24 hours / 65 days.
How To Calculate A Requirement of air Ventilator:
No. of Ventilator Required = Ventilation Rate Q
                                               Exhaust Capacity
Required Ventilation rate (cfm)= Volume (ft) x Air Change Rate
                                                                        60
Volume of Space to be ventilated (ft) = 1xwxh
Select Air Change Rate from. Table A.
Select Exhaust Capacity from Table B as per required Temp.
Diff. C and wind- Velocity (MPH).

Table A: Required Air charge rates

Type of Building Air Change rate Per Hour
Type of Building Air Change Rate Per Hour
Were House 4-6 Engine room / Laundry @ Plastic Factory Heavy Factory / Transformer room
10-30
Textile Mill / Auditorium 4-12
Factories ( Light) Hall 6-12 Print Shop / Boiler room 15-60
Paper MW / Brewery / Oil mill / Packaging Room 8-30


Table B: Performance Data

WIND Velocity (mph)
5 8 10
Temp Diff c
3 5 10 3 5 10 3 5 10

STACK (Height ft) Exhaust Capacity in CFM
Model No.
AP:28

10

939

1000

1102

1436

1498

1600

1792

1854

1958

20

1005

1084

1216

1503

1582

1714

1859

1938

2070

30 1058 1154 1314 1556 1652 1812 1915 2010 2168

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