Thermal Control Glass - PLANITHERM ULTRA N

High performance thermally insulating glass (1.1 u-value), designed for the commercial market

PLANITHERM ULTRA N is a high performance thermally insulating (low-E) glass that offers both low U-values coupled with unrivalled neutrality and is positioned optimally for commercial applications.


The PLANITHERM range of products consists of:

  • PLANITHERM TOTAL+ - ideal for North facing elevations to capture the most of the sun's heat
  • PLANITHERM ONE  - Ideal for south facing elevations or large bi-fold doors
  • PLANITHERM 4S - Ideal for conservatories
  • PLANITHERM ULTRA N - Ideal for commercial buildings

Where can PLANITHERM ULTRA N be used

PLANITHERM ULTRA N offers superior thermal insulation properties in combination with high neutrality. It is positioned specifically for commercial exterior applications but is also suitable for domestic applications:

Commercial Solutions:

  • Façades and windows
  • Structural glazing
  • Overhead glazing 

Also Suitable For Residential Solutions:  

  • Windows and skylights
  • Patio doors, French doors
  • other external doors
  • Conservatories and sunrooms


PLANITHERM ULTRA N 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 ULTRA N 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 ULTRA N 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

  • Very good thermal insulation performance through very low centre pane u-values (1.1W/m2K in double 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 ULTRA N 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 ULTRA N can be combined with many other glass products, providing a multitude of high performance, multi-functional glazing options, including:

  • Solar control glazing (e.g. COOL-LITE or ANTELIO)
  • Acoustic insulation (e.g.STADIP SILENCE)
  • Safety and security (e.g. STADIP / STADIP PROTECT / SECURIT)
  • Spandrel panel / screenprinted glazing (e.g. EMALIT EVOLUTION / SERALIT EVOLUTION)
  • Self-cleaning glazing (e.g. BIOCLEAN)
  • Obscured and/or decorative glazing (e.g. MASTERGLASS / Traditional Patterned glass)
  • Environmentally friendly solution, given the lower CO2 emissions associated with reduced energy consumption.

PLANITHERM ULTRA N technical specifications
Composition in mm 6(16)6
Coating Positions Face 3
LT 79% 79%
LRe 12% 12%
g-value* 0.62 0.63
Shading Coefficient 0.71 0.72
U-value in W/m2K Air 1.4
90% Argon 1.1

* Light and solar performance according to EN 410

How to handle & process PLANITHERM ULTRA N

PLANITHERM ULTRA N 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.

See the handling guidelines brochure for more details.

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