A low E film is an extremely thin layer of metal oxides, in the order of nanometers, which, if it is applied on the glass, provides a capacity of reinforced thermal insulation. The film reflects inward a part of the incident long-wave energy (heating), decreasing the absorption of the own glass and, therefore, the energy emitted outside.
Improve solar and thermal control
Reduce summer heat gain and winter heat loss
Decrease UV transmission such as furniture fading
Reduce condensation in double glazing
To obtain the best results, it is necessary to carry out a blower door test
It can reduce valuable solar heat gain in colder climates
Low investment. The approximate cost of low emissivity layers is 20 €/m2, although it varies for each type of layer.