At Epwin Glass, we use the most thermally-efficient glass available to reduce heat loss, maximise energy efficiency and improve comfort levels. Our standard gas filled thermal insulation glass units have a very high light transmission and an excellent centre pane U value of 1.2 W/m2K dramatically reducing fuel bills. For customers requiring higher levels of performance, we can also offer double glazed units with centre pane U values as low as 1.0 W/m2K and even lower U values with triple glazed units.
There are several factors that affect the efficiency of thermal insulation:
Low E Glass
Thermal insulation glass coatings are generally referred as Low Emissivity glass or Low E glass. Using Low E glass on the inside of a sealed glazed unit allows customers to retain more of the heat generated in their home and gain free heat from the sun’s rays.
Window Energy Rating (WER)
WER is the measurement used in the UK to define thermal efficiency of fenestration (windows and doors). This measurement combines the heat retaining qualities (U value) and solar heat gain properties (G value) of the complete window to give a value – ‘A++’ rating being the best and ‘C’ rating the lowest acceptable.
Soft-coat Low E glass is today’s preferred option for most customers, marrying a U value of 1.2 with a good G value, allowing customers to achieve excellent Window Energy Ratings (WERs) their window systems when combined with warm edge technology and gas filling. High performance Soft-coat Low E glasses that allow U values of 1.1 or 1.0 W/m2K in double glazed units are also available.
Epwin Glass’s sealed units come with the cavity filled with argon gas to further reduce the loss of heat. Online gas filling ensures the consistent application of the correct amount of gas in Epwin Glass’s units.
Low iron glass
Low iron glass can be used to enhance solar gain (G value) and the WER value, ultimately increasing thermal intake from the sun’s rays. The lower iron content produces a whiter appearance, allowing the rooms to benefit from as much natural light and heat as possible.
Warm edge spacers
We supply warm edge spacers to help reduce cold bridge around the edge of the sealed unit. This virtually eliminates peripheral condensation around the glass and helps to increase the overall U value of the windows, thus improving its WER value.
Triple glazing opens a whole new world of opportunities to window installers and glass companies because there are three panes of glass and six surfaces on which we can use the different technologies. When manufacturing triple glazed units, Epwin Glass will always use a thermally toughened glass as the centre pane to eliminate any risk of thermal fracture which can occur on a partially shaded window in extreme conditions.
The rest of the specification of the unit depends on what you need to achieve. Our top specification is two panes of soft-coat Low E glass with two warm edge spacers and both cavities gas filled (typically giving a 0.8 U value). However, there are other options, such as adding a self-cleaning glass with solar control values for south-facing aspects.
Conservatory Roof Glass
Epwin Glass offer a wide range of glass types specifically developed for the Conservatory Roof market. These glasses combine a high degree of Solar Control to reduce unwanted heat build-up and glare in the summer months and a very high level of Thermal Insulation to keep the heat in in the winter giving year round comfort. Additionally these glasses can have self-cleaning glass on the outer surface to reduce maintenance.