The U-value of a sealed unit is determined by the elements that are used to make up the sealed unit. The lower the U-value the better insulation performance of the unit, which is why our customers often want lower U-values, because they are proof of better performing products.
Just because a unit is triple glazed, it doesn’t necessarily mean that it will have a lower U-value when compared to double glazing. The U-value is determined by the countless combinations of elements that go to make up a sealed unit. We’ve included some examples to show you this below.
Click on ‘Double Glazed‘ or ‘Triple Glazed‘ tabs below to see examples of those units. The example specifications are ranked firstly by unit size and then by U-value.