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Delta Ventilation Ltd
HVAC & Cooling Systems ">> Natural Ventilators > Passive Stack Ventilators

Double Flap Smoke Ventilator Solution
The Duo Therma is the solution for projects that require high acoustic or thermal performance together with low air leakage, for instance theatres, cold stores and schools. With achievable U values as low as 0.9W/m² deg K, acoustic reductions Rw of 31 dB and no air leakage at 50 Pa, it is the ultimate performance ventilator.
The Duo Therma extracts large volumes of smoke, utilizing the buoyancy of hot gases in the rising plume. Natural day-to-day ventilation is driven by pressure differences to move fresh air through the building. Pressure differences are caused by wind or the buoyancy effect created by temperature differences commonly known as the “stack effect”.
The Duo Therma is available with various flap types including insulated aluminium, glazed or polycarbonate. Operated either electrically or pneumatically with base options for fixing onto roof sheeting or upstand.

Duo Therma

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Specification Details for Duo Therma (Passive Stack Ventilators)

Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Delta Ventilation Ltd is consulted before specifying.


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