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Thermoflex Warm Edge Spacer

A superior technology designed to minimise energy loss through your windows

Benefits of Thermoflex Warm Edge Spacer and Energy efficient windows for Specifiers, Architects and Builders
Manufacture superior glazing units with Thermoflex warm edge spacer
Thermoflex Warm Edge Spacer for Window Installers and Fabricators
Homeowners can reduce heating bills with Thermoflex energy saving windows

See also:

Thermobar Warm Edge Spacer Tube

Building Regulations and Window Energy Ratings

Passive House Certification

Rainbow style Window Energy Rating


Thermoflex is a Passive House certified component, having achieved a phA+ rating from the Passive House Institute (PHI). Ther certificate indicates that Thermoflex fulfils high energy efficiency and hygiene requirements for an 'arctic climate region' and all other climate regions with lower requirements.


The PHI is an independent research institute with the only internationally recognised, performance based energy standard in construction. The PHI has played a crucial role in the development of the Passive House concept and has since assumed a leading position with regards to research on the development of construction concepts, building components, planning tools and quality assurance for especially energy efficient buildings. It holds a Database of Certified Passive House Components which are rated and classified based on hygiene and efficiency within the criteria of a Passive House. Visit and select ‘Component Database’ for a full list of rated components and their relevant certificates.

Building Regulations & WERs Page 3 of 3

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