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A thermal break is part of the construction to minimize heat or cold transfer. It is best defined by the National Fenstration Rating Council, NFRC 100-2010:
Thermally broken (TB) members: system members with a minimum of 5.30 mm (0.210 in) separation provided by a low conductance material (where thermal conductivity ≤ 0.5 W/mK, (≤ 3.6 Btu·in/h·ft2·ºF) or open air space between the interior and exterior surfaces. Examples of such systems include (but are not limited to) pour and debridged urethane systems, crimped-inplace plastic isolator systems, and pressure glazed systems with intermittent fasteners.
[Note: Intermittent fasteners shall be manufacturer's standard. Nominal spacing of fasteners shall be 150 mm (6 in) apart or greater.]
Thermally improved (TI) members: system members with a separation ≥ 1.60 mm (0.062 in) separation provided by a material [where thermal conductivity ≤ 0.5 W/mK, (≤ 3.6 Btu·in/h·ft2·ºF)] or open air space between the interior and exterior surfaces. Such systems include members with exposed interior or exterior trim attached with clips and all skip/debridged systems.
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A typical Windows 7 screen can be seen by clicking the related linkk to Wikipedia.
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Tattingers - 1988 Broken Windows 1-8 was released on: USA: 4 January 1989
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No. A thermal break means that there is a break or gap between the external structure and the internal structure. A window therefore would have to be double glazed to achieve this.
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