"Sub-zero" is a CE approved inward opening aluminium clad triple glazed timber window system with whole window U value of 0.8 W/m2K (or 0.7 with Purenit frame insulation), making it suitable for use in passive dwellings. The sub-zero system includes inward opening bi-fold and sliding doors. 88mm timber frame depth + 18mm aluminium cladding = 106 mm total frame depth.
- CE approved
- Suitable for passive buildings
- Triple glazed
- Multiple gaskets
- Laminated knot free timber
- Window U value as low as 0.7
Air permeability 600Pa Class 4
Watertightness class E1950
Triple gaskets protect against air and water leakage.
Roto NT locking fittings with micro-ventilation and anti-burglary catch.
48mm triple glazing with Argon and warm edge technology gives centre pane U value of 0.5.
Sigma microporous water based coating system.
Opaque paints according to RAL and NCS colour charts.
4 layer coating system, impregnation, primer, undercoat, topcoat.
10 year guarantee against rot and fungal infection.
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