They can effectively heat or cool up to 120 square metres, making them a perfect option for open plan areas such as commercial premises, classrooms, places of worship, loft and basement conversions and home extensions.

The units also use “Cluster Ion Technology” to function as air purifiers and particulate filters that don’t dry out the air in the same way that many air conditioning units do. This is ideal for allergy sufferers and contact lens wearers. It only takes a day or two to install these units.

They are also low cost, with a 6Kw unit only costing around 4 pence per hour to run on maximum output. They are also up to 500% efficient.