Calculator for Windows and Doors
Our U Value Calculator is designed to calculate the accurate u-value of bespoke design windows and doors. It can be a single paned window/door, or one with a number of panes of glass.
Whole Window U Values
This is a whole window calculator that works out the combined u value of the glazing, the frame and the spacer. We do not just supply a u-value taken from the centre point of the glass or the centre of a window panel.