ALT BF73

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BF73 system of bi-folding panoramic doors is a modern exclusive solution designed for residential houses, as well as commercial buildings with café entrances and restaurant terraces, showrooms and meeting rooms in business centers and hotels.

ALT BF73 Bi-folding patio doors will span the large openings and give the maximum of everyday comfort keeping your home warm and safe. Open-in or open-out options as well as folding to one or both directions help to meet any design requirements of your projects.
Due to polyamide thermal breaks and special gasket system as well as up to 44mm glazing option BF73 bi-folding doors will keep heat in and cold out.

Infill unit thickness................................. up to 1–3/4” 

Sash width............................................ up to 47” 

Sash height.......................................... up to 118” 

Sash weight ..................................... up to 265 lbs 

Thermal performance ............ U = 0.25 BTU/(hr×ft2 ×°F) 

Acoustical performance................... STC 40 OITC 35