AIRTIGHTNESS FOR PASSIVE HOUSE WINDOWS

The window frames must be well insulated and fitted with low-e glazings filled with argon or krypton to prevent heat transfer. For most cool-termperate climates, this means a U-value of 0.80 W/(m²K) or less, with g-values around 50% (g-value= total solar transmittance, proportion of the solar energy available for the room).

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ThermaDura has proudly achieved the best 3 Blower door test results in New Zealand.