USS UNIVENT - ROOFVENT
 
 
Application
Factories, Warehouses, Workshops, Industrial Sheds, Public utility Buildings etc.
 
Sizes
 
R500 (Regular Size)
   
E 24
   
Can be configured to meet required fresh air changes. Enhances ventilation by removing hot gases, obnoxious fumes, bad odour etc.
Available in Aluminium finish. Easy to install and can be fitted to any type of roofing.
 
How does USS-Univent Roof Ventilation System work?
USS-Univent Roof Ventilation System utilises the velocity energy of the wind to induce flow of air by centrifugal action. The centrifugal force caused by the spinning vanes creates a region of low pressure area which draws and throws out hot air from below and fresh cool breeze is pushed in.
A slight breeze is enough for the turbine to spin and even after the breeze has stopped, the rotor cage will use its stored energy to continuously rotate (free fly wheel effect) to remove air giving rise to ventilation, thus maintaining suction even at low wind velocities.
The dome of USS-Univent is excellently designed to give boost to convective Thermal currents, which enhances its rotating function.
 
Advantages
1.
No operation costs
 
As the Univent 500 System, is a self contained wind powered design, there are no operational costs incurred.
2.
Helps reduce Power costs
 
Proper ventilation provides a cooler, damp free and low humidity working environment - need for air conditioners or industrial fans considerably minimised.
3.
Reduced Installation costs
 
Due to the versatility of the variable pitch throat, installation costs are reduced as one unit fits most industrial applications (0° - 22.5°)
4.
Helps reduce Maintenance costs
 
Damp & humidity causes corrosion of building structures, painted surfaces, metal fittings etc. Potential corrosion also causes damage to electrical wiring.
 
USS Univent provides an efficient solution to these problems though proper ventilation.
 
Calculation
1. Determine the Volume (VOL) of the building in cubic meters. (Length x Width x Height).
2. Depending on the building type, select the required Air Changes (A/C) per hour, from the table below.
3. From local authority records, determine the typical wind speed. 6, 8,10,12 or 16km/h. This will establish the exhaust capacity M 3 per hour (Refer Table).
4. Calculate:
No. of Ventilators
VOL x A/C
---------------------------
Exhaust Capacity m³
(Refer Table)
 
Exhaust Capacity m³ For Various Wind Speeds
USS-Univent 500 Throat size Wind Speed Km/h Exhaust Capacity M³ per hour
500mm 6 km/h
8 km/h
10 km/h
12 km/h
16 km/h
1918 m³ / hr 
2574 m³ / hr 
2844 m³ / hr 
3132 m³ / hr 
3924 m³ / hr
 
Materials
 
Sl.No. Materials Yield Strength Total Coated Thickness
1. PPGI 240 Mpa 0.47 - 0.50mm
2. Bare Galvalume 550 Mpa 0.47 mm
3. Colour Coated Galvalume 550 Mpa 0.47 - 0.5
The Performance data above is calculated in accordance with the American Society Of Heating, Refrigeration and Air Conditioning Engineers. (ASHRAE) Air change rates must conform to local health department building codes.
 
Recommended Air Changes (A/C) For Various Building Types
Building Type Recommended Air Changes Per Hour
Warehouses
Factories & Workshops 
Gyms, Tennis & Squash Courts 
Assembly Halls 
Garages 
Toilets 
Laundries 
Stables, Piggeries & Poultry Houses
3 to 5 
3 to 8 
3 to 8 
6 to 12 
6 to 12 
7 to 12 
7 to 15 
7 to 25
The Performance data above is calculated in accordance with the American Society Of Heating, Refrigeration and Air Conditioning Engineers. (ASHRAE) Air change rates must conform to local health department building codes.
 
 
 
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