1. Renson and Dampers

2. Natural Ventilation Dampers Dampers are used to control airflow from one space to the other. Often referred to as ventilators. Used for moving air from one space to another; normally outside to in. Normally will need a weather resistance when closed. Material can be aluminium or steel. Requirement is physical performance No real market leader

3. Façade Dampers Similar to natural ventilation dampers but they provide both a weather and thermal resistance. Primarily used in natural ventilation schemes Damper solutions have been twin insulated metal with a U value, air leakage and weathering. –Typical U values of 2w/m2K –Air tightness of between 5 and 10m3/hr/m2 at 50Pa –Louvre water tightness class A as per HEVAC at 0m/s velocity Often the casing is non thermally broken metal HVC solution is a pure uPVC assembly to replace the insulated metal blade. –Typical U values of around 1 but it needs verifying –Airtightness of around 10. However usually quoted per m of blade and is <1 –Louvre water tightness to suit louvre used

4. Renson Solutions – HVC Damper

5. Renson Natural Ventilation Solution

6. Optional extras Class A louvre Internal grille Motor operation – electric, pneumatic, manual Acoustic modules –Silencers –Acoustic louvres –Tubular fins (Gilberts) –Passivent duct vent Heating –Tubular fin heating –Electric heater batteries Fan assisted –Monodraught turrets PV powered