1) How does Thermocill™ work?

The specially designed device is placed underneath a window board in a home. By redirecting warm air from a radiator underneath a window, up towards the window pane, a wall of warm air is created adjacent to the double-glazed window. 


This wall of warm air reduces the level of cold air entering the house though the window and also minimises the level of warm air being lost through the window.

2) What are the energy/CO2 saving benefits of Thermocill™? 


  • Rooms heat up quicker – up to 23% faster

  • Heat loss through a double-glazed window is reduced - by up to 3%

  • Energy needed to heat up a room is reduced – by up to 16%

  • Annual energy bill reduced by approx. £50 (for a typical semi-detached 3-bedroom house in the UK). 

  • Annual CO2 emission reduced by approx. 210kg (for a typical semi-detached 3-bedroom house in the UK). 


All of which helps to improve the energy efficiency of households and fight fuel poverty.

3) What are the health benefits of Thermocill™?


Damp and mould on or around windows, caused by condensation on the window pane, can cause health problems for those living in the household such as:

  • respiratory issues

  • allergies

  • asthma

  • and affect the immune system


The only way to prevent this is to clean up the damp and mould and stop it growing. 


The only way to stop it growing is to prevent the window condensation causing it.


The only effective solution to stop window condensation is Thermocill™.


Computer modelling carried out by Manchester CFD, confirms that the wall of warm air created next to a double-glazed window when Thermocill is installed, reduces the level of condensation produced. See our Scientific Evidence.

4) How and where can I install Thermocill™ ?   


Thermocill™ is suitable for both newbuild and retrofit household projects.


Retrofit is an easy, straight-forward process and the device is particularly suited to social housing energy efficiency improvement schemes. 


The device can be installed directly on top of the existing window board, and once fitted can be covered using a 8-10 mm recycled capping board (hockey stick or angled type depending on the shape of the existing internal window board), and sealed ready for use.

© 2020 by Thermocill Limited. A company registered in England & Wales.

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