InvisiTherm®
System Performance
Designed to improve comfort, reduce external noise and preserve the character of existing windows.
THERMAL
Up to 63% reduction
in heat loss
ACOUSTIC
55% to 88% reduction
in external noise
NATURAL LIGHT
87% light transmission
U-VALUE
Achieving a U-Value
of approximately
1.7 W/m²K
10-YEAR GUARANTEE
Long-term clarity
and performance
Designed for comfort and performance
InvisiTherm® is a discreet magnetic secondary glazing system developed to improve thermal comfort, acoustic performance and everyday usability while working sympathetically with existing windows.
Thermal Comfort
Designed to improve comfort throughout the year while helping reduce heat loss through existing windows.
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Up to 63% reduction in heat loss
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Up to 22.5% improvement in energy efficiency compared with single glazing
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More stable indoor temperatures throughout the year
Acoustic Performance
Designed to help reduce unwanted external noise from busy roads, rail lines and urban environments.
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Up to 88% reduction in external noise
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Effective against traffic noise
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Effective against rail noise
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Suitable for busy urban environments
Light & Visual Quality
Designed to maintain natural light while improving comfort and helping protect interior furnishings.
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87% natural light transmission
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UV protection for interiors
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Long-term optical clarity
Designed Around Existing Windows
The InvisiTherm® system uses a discreet magnetic fixing method designed to avoid alteration of existing windows and frames.
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Magnetic fixing system
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Adaptable installation
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Heritage-friendly approach
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Made-to-measure fit
InvisiTherm® Performance Summary:
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Reduces heat loss through glass by at least 63%.
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Reduces utility consumption by at least 22.5%, often much more.
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Half the weight of glass, easier to clean, and virtually unbreakable, ideal for stained glass windows.
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Our system offers a U-value of approximately 1.7 W/m²K, compared with typical existing single glazing in the region of 5.5–6.5 W/m²K.
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86% transparency (compared to 76% for glass), maintaining clarity for over 40 years.
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Lowers summer temperatures by at least 27%.
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Noise reduction of 58 to 88%, in both directions.
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Prevents internal fading.
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No planning permission required for installation.
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Comes with a 10-year transferable guarantee.
