Thermofor Auto louvre opener


(Including VAT)

Product id: 255
Delivery in 1-2 working days

More than 10 in stock


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 teh world

This product does NOT fit the Hercules OCTAGONAL range of buildings

Q. Can these auto vents be used with a double opening window, should I buy 2 of them?

A. A double sized (1200mm + wide) single vent would require 2 of these Auto-vents. I would recommend the stronger BAYLISS XL auto-vent openers for a large vent like this for extra reliablity during windy conditions.

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14 reviews of Thermofor Auto louvre opener
Average rating: (4.7)

by Stephen Roxbee

Great little product that works as described. It needs a bit of drilling to get the opener in the correct position on the louvre frame but not difficult. It works perfectly and did i need both openers last weekend after 34'C. Buy as you will not be disappointed.

by John Crichton

Simple to fit in less than 5 minutes and instant results

by Thomas Sharpe

Brilliant, exactly what I needed for going away and on holiday, or days out. Very easy to fit, have now ordered a 2nd one.

by Robert Rogers

Works a charm

by Lesley Shimell

Excellent. Not difficult to fit and works well.

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Next day delivery if ordered online before 2pm - (2-3 days if ordered via phone)

Delivery of this item to Mainland England, Scotland and Wales is £3, offshore may be subject to a higher charge. Delivery costs will be calculated and displayed at checkout before any payment is required

As standard this item is delivered the next working day provided we receive full payment before 2pm. Orders received after 2pm on Friday will not be dispatched until Monday.

Please note if any other items in your basket are quoted with a longer delivery time, then your items will not be dispatched next day, but within the time period quoted for item with the longest delivery.

There is only one charge for delivery per order.


Product Reviews

4.7 Average 14 Reviews

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