255

Thermofor Auto louvre opener | 5 slat 21 reviews, 4.8 out of 5 — see all reviews

Name: Thermofor Auto louvre opener | 5 slat
Brand: Thermofor
SKU: 255
Price: 37 GBP
Availability: InStock

£37

255

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

Full description

Get it by Tuesday, Nov 17If you order within 60 hours 27 minutes

Product Details

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Reviews

4.8

Average Rating

Reviews

Anne Francis

The screws were too small for the holes on the louvre unit. I had to put on a wooden panel to screw the opener onto. The plastic catch does stay in place.

May 2026

Customer Reviews

(4.8)

Based on 21 reviews

5 star reviews: 81.0%
4 star reviews: 19.0%
3 star reviews: 0.0%
2 star reviews: 0.0%
1 star reviews: 0.0%

Customer feedback

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Colin Watson

Excellent product, little tricky to put together but works great with the aluminium louvre. So good going to buy a second one.

James Mackenzie

Nice, well made, easy to install and works smoothly.

Alan Bedford

Excellent replacement for a seized old version. Fitted perfectly & works well. Far cheaper than the Halls equivalent.

April 2024

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