Thermal Control Glass - PLANITHERM ONE

Great combination of Thermal performance (1.0 u-value), Solar Control (blocking 51% of the sun’s heat) and allows 70% of the light into the room

PLANITHERM ONE represents the most advanced thermal insulation performance within the PLANITHERM family. It offers the lowest possible centre pane U-value available from a double or triple glazed unit in the UK today.


The PLANITHERM range of products consists of:

Where can PLANITHERM ONE be used?

PLANITHERM ONE is an extremely versatile low-E solution suitable for a wide range of applications:

Commercial New Build and Renovation Solutions:

  • Façades and windows
  • Structural glazing
  • Overhead glazing

Residential New Build Solutions:

  • Windows and skylights
  • Patio doors, French doors
  • Other external doors

What PLANITHERM ONE can offer

SGG PLANITHERM ONE supplied by Glassolutions offers a number of key benefits that clearly differentiate it from other low-E products and suppliers.

Sealed unit manufacturers

  • Enables manufacturers to offer customers a low glass U-value option for their windows or facades.
  • The PLANITHERM ONE coating is highly durable and easy to process helping to ensure the highest levels of quality of finished units.
  • A British-made product with full range availability from national, regional and local Glassolutions branch & customers, in a range of sizes and supported by nationwide availability of toughened product.
  • PLANITHERM ONE is part of a family of products each specifically engineered to deliver maximum performance for the relevant market – whether that’s domestic home improvement, new build or commercial.
  • Glassolutions offers its manufacturing customers comprehensive technical, operational and marketing support – including access to the PLANITHERM Installer Network

Window or facade fabricators / installers

  • Exceptional thermal insulation performance through very low centre pane u-values (1.0W/m2K in double glazed format and 0.5W/m2K in triple glazed format) while retaining advanced neutral aesthetics.
  • Greater flexibility in compliance for all frame types.
  • Reduced condensation on the inner pane of glass.
  • Using sealed units with PLANITHERM ONE inside virtually guarantees compliance to the UK Building Regulations in terms of helping windows and facades achieve low whole window U-values.

End-users / clients

  • Considerable reductions in heating bills.
  • Eliminates cold areas around windows.
  • Significantly reduced condensation on the inner pane.
  • Maximises the transmission of natural light into the building, especially when compared with other low-e glasses.

PLANITHERM ONE can be combined with many other glass products, providing a multitude of high performance, multi-functional glazing options, including:

PLANITHERM ONE technical specifications
External Pane PLANICLEAR
Composition in mm 6(16)6
Coating Position Face 3
Light Transmittance (LT) 69%
Outdoor Reflectance (LRe) 21%
Indoor Reflectance (LRi) 23%
Solar Factor (g-value*) 54%
Shading Coefficient 0.62
U-value in W/m2K Air 1.3
90% Argon 1.0


PLANITHERM ONE T meets the durability requirements of class C of European standards EN 1096 and are marked.

Positioning the coating on Face 2 affects the performance values in particular the g-value which changes to 48%

* Light and solar performance according to EN 410. Solar factor - is the amount of sun's heat that is allowed to enter the room e.g. 54% of the sun's heat comes into the room.


Technical Guide

If you need information on how best to process Planitherm One please download our technical guide

How to handle & process PLANITHERM ONE

PLANITHERM ONE must always be assembled into a double or triple glazed unit. The coating is generally placed on face 3 (and 5) of the unit, though it is possible to place the coating on face 2 without affecting the U-value. Appearance may vary slightly, so it is important to maintain consistent coating positioning throughout a particular façade.

Glassolutions also offers manufacturers tailored support to assist them in producing the PLANITHERM range of high performance sealed units.

See handling guidelines brochure for more details.

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