uPVC lift and slide door u-values

The u-values, or heat transfer co-efficient, displayed on this page provide an accurate insight into the thermal performance of our uPVC lift and slide patio door models. From the insulation of our glass, to the frame, the values are displayed in clear tables and can also provide a good indication of potential energy bill savings.

IDEAL Basic profile u-values

Glass U_g value W/(m²k)	Frame U_f value W/(m²k)	Window U_w value insulating glass edge seal aluminium W/(m²k)	Window U_w value insulating glass edge seal KSD W/(m²k)	Window U_w value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1	1.8	1.4	1.4 (1.35)	1.3 (1.34)
1.0	1.8	1.3 (1.32)	1.3 (1.28)	1.3 (1.26)
0.7	1.8	1.1	1.1 (.,05)	1.0 (1.04)
0.6	1.8	1.0 (1.02)	1.0 (0.98)	1.0 (0.96)

Table of u-values for IDEAL Basic profiles according to EN ISO 10077-1, see comments 1) 2) 3) 4) 5)

IDEAL Basic - Profile section

IDEAL Premium profile u-values

Glass U_g value W/(m²k)	Frame U_f value W/(m²k)	Window U_w value insulating glass edge seal aluminium W/(m²k)	Window U_w value insulating glass edge seal KSD W/(m²k)	Window U_w value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1	1.1	1.3 (1.29)	1.3 (1.25)	1.2 (1.23)
1.0	1.1	1.2 (1.22)	1.2 (1.17)	1.2 (1.16)
0.7	1.1	1.0 (0.99)	1.0 (0.95)	0.9 (0.93)
0.6	1.1	0.8 (0.86)	0.8 (0.82)	0.8 (0.79)

Table of u-values for IDEAL Premium profiles according to EN ISO 10077-1, see comments 1) 2) 3) 4) 5)

IDEAL Premium - Profile section

PremiDoor 76 profile u-values

Glass U_g value W/(m²k)	Frame U_f value W/(m²k)	Window U_w value insulating glass edge seal aluminium W/(m²k)	Window U_w value insulating glass edge seal KSD W/(m²k)	Window U_w value insulating glass edge seal Swisspacer Ultimate W/(m²k)
1.1	1.1	1.3 (1.29)	1.3 (1.25)	1.2 (1.23)
1.0	1.1	1.2 (1.22)	1.2 (1.17)	1.2 (1.16)
0.7	1.1	1.0 (0.99)	1.0 (0.95)	0.9 (0.93)
0.6	1.1	0.8 (0.86)	0.8 (0.82)	0.8 (0.79)

Table of u-values for PremiDoor 76 profiles according to EN ISO 10077-1, see comments 1) 2) 3) 4) 5)

PremiDoor 76 - Profile section

Dimension used for values: 3500 x 2300mm
Average U_f=1.1 (W/m²K)
Minimum requirements in accordance with European energy saving legislature 2014: U_w =1.3 W/(m²K)
U_w values < 1.0 W/m²K are rounded to two decimal places in accordance with EN ISO 10077
U_w values > 1.0 W/m²K are rounded to one decimal place in accordance with EN ISO 10077, two decimal places are given for further information

Protecting the environment while saving money

Because the heat co-efficient defines the amount of energy that is lost, uPVC lift and slide doors should have as low a value as possible.

windows24.com offers three high-quality, durable uPVC lift and slide door profiles, purpose designed to excellently fit this requirement: IDEAL basic, IDEAL premium and PremiDoor 76. Although they already boast an impressive thermal performance in their standard configuration, the lowest possible u-values displayed above for each model can then be acheived by selecting features, such as a warm edge spacer combined with low Ug triple glazing, in the configurator.

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