
This mechanical device is designed to automatically open and close a louvre vent, in response to temperature. A wax-like substance, contained in the cylinder, expands with heat, operating a piston which opens the louvre via a linkage arm. As the temperature falls, the process reverses, and a spring closes the louvre. There is also an adjustment knob, which enables the opening temperature to be altered to between 15 and 25 degrees centigrade. Some simple drilling is required to fit the opener to the side of the louvre vent. Hand made by us in our Staffordshire workshop, trade enquiries welcome from all around the world This product does NOT fit the Hercules OCTAGONAL range of buildings
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5 out of 5 stars
Looks good and does the job of extra ventilation.
December 2021