Recent trials have investigated the efficacy of manufacturing the energy-saving device entirely from hemp. Hemp is a naturally occurring material derived from the cannabis plant. It has been used in building and construction materials for decades due to its structural fidelity.

Products from companies like Thermocill, a simple yet innovative device for the home, are once more turning towards hemp because of its environmental benefits and possible role in building a more sustainable, low-carbon future.

Fitted under a window board, the unassuming device – currently made from 100% recycled nylon – works by redirecting heat from the radiator below it to form a chamber of insulating heat within the glazing.

In doing so, Thermocill claims their product heats the home quicker and consequently reduces a building’s energy bills. They also note that these results have been verified by the Energy Saving Trust.

In 2013, Thermocill’s design was awarded the Ernst & Young Entrepreneurial Award for Cleantech and Energy, and the ‘Innovator Award’ at the North West Business Masters Awards. A council in the North West of England has since agreed to initially install the product in 2000 local homes.

“Providing households with an all-round sustainable solution that has a positive impact on the climate, from both its application and manufacture, has always been the plan,” said Keith Rimmer, the inventor of Thermocill. “Hemp is clearly going to become more important in the drive for a more sustainable construction industry. In the drive to use less plastic, hemp is the way of the future.”

Indeed, Thermocill points out that hemp not only grows quickly, easily and requires little energy input, but it is also non-toxic and naturally occurring, meaning that it does not pollute landfill, soil, or waterways, unlike petroleum-based plastic alternatives that are, incidentally, weaker.

“We believe Thermocill will be the very first hemp-based household energy-saving solution and is a great example of how ideas and innovations can help save the planet,” said Mr. Rimmer. “We’re proud to be playing our part leading the way in more wide-spread application of hemp for a sustainable future.”