What Does A Bayliss Automatic Vent Opener Do?

Opens and closes a hinged vent automatically using energy from the warmth of the sun.

Guaranteed For 2 Years

Each automatic vent opener is guaranteed for two years against faulty manufacture. As long as the unit has not been tampered with (i.e. the piston pulled out of the tube), damaged by the window being tied shut, damaged by unusually strong high winds (add our optional wind strap to keep strong winds from damaging the opener) or fitted incorrectly, we will repair it free of charge if it is returned to us. Bayliss automatic vent openers are designed and tested to last many years.
 

How Does an Automatic vent opener Work?

 A strong metal tube contains wax which expands with heat. This pushes a piston which opens the vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong stainless steel 6½lb spring closes the vent and resets the piston.  

Why Is The Bayliss Automatic vent opener better?

It has been designed by engineers who have been making automatic vent controls for over 40 years. The Bayliss MK7 has a strong stainless steel spring to give a firm closing force.  The unit gives a balanced lifting action in the middle of the vent and this avoids any sideways thrust on the vent which can twist it or even push it out of position.

Do you have an old Bayliss opener that just doesn't seem to open like it used to?

It could be that the power tube has lost wax or pressure.  If the vent opener isn't bent or damaged in some other way then you might be able to simply replace the power tube which should be more cost effective. We do sell replacement power tubes. Give us a call to see if that is a good choice for you.