OS2 65 - Steel&Brass windows

strong profiles to choose from to find solutions for all project requirements
Thermal insulation Uf

> 1,38 W/(m2K)

Air tightness window

class 4



Wind tightness

class C4

OS2 65 is the thermal break steel window with profiles of just 27 mm – 47 mm for the lateral section, 62 mm for the central section and depth of 65 mm. It can house insulating glazing of up to 40 mm. OS2 65 is part of the OS2 family of profiles, studied, conceived and realized by Secco Sistemi to replace the casings used from the nineteenth century up to the middle of the last century. Utilized also in contemporary architecture for the transparency and clear-cut lines, the slender profiles of the OS2 system ‘dematerialize’ the walls and allow for greater freedom in the design of the casing.
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  • Key features
  • Technical Specifications
  • Performance
  • Thermal break steel windows for glazing of 40 mm,
  • profiles of 27 mm,
  • central section 62 mm and series of sashes in the prospectus
S2 window with inward opening, equipped with accessories, gaskets and thermal break profiles with depth of 65 mm, allowing to realize windows in a wide range of variations: square, rectangular, curved or shaped, with insulating glazing of up to 40 mm thickness. Each solution is complete with the specific accessories, certified and integrated with the system. The sealing characteristics of the casing are guaranteed by a weep system with one central sealing gasket and an internal rebate seal. OS2 65 is a casing with internal and external rebate, with sections of 47 mm for the side section and of 62 mm for the central section. To subdivide the glazing for the frames, the system uses a thermal break profile of 36 mm.
wind resistance - test pressure5
wind resistance - frame bendingC
water tightness9A
acoustic performance (with Rw per IGU 45 dB)47 (-2;-5) dB *
thermal transmittance (with Ug glass 1.0 W/m2K)1,16 W/m2K **
air permeability4
break-in resistance(RC)3


We offer high variety of Aluminum windows and doors. Every order is custom made according to our customers requirements. Our modern construction solutions make it possible to create extremely large g lazed areas and improve building design and interior décor not available with most of our competitors, for example 25’ W x 9’H lift and slide doors. We have almost an unlimited potential in terms of both colors and their different shades for our aluminium components. Another key benefit for our products are the components utilizing multi point locking. This is achieved through a link gear running around the window sash, which operates pins which in turn lock into keepers located around the perimeter of the sash opening. Depending on the size of sash used, there can be up to twelve locking points on any one sash. In doors a six-point lock is used. This comprises of four compression roller pins, one latch and one dead bolt. All the locks on any one sash are operated by one lever and secured by one key. Further this creates insulating advantage as an even sash seal is achieved as well as enhanced security. Pleae note we can perform the installation or assit our customer in an installation consult capacity.


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Eco Windows USA provides top quality window and door solutions in Brass, Steel, Aluminum, Wood and PVC. With a capacity of producing over 5000 windows per day our systems are highly customizable, allowing for almost unlimited possibilities to arrange elevations and building interiors for both residential and commercial use. Our brand of window and door carpentry is produced by combining precisely selected materials, premium German hardware, latest technologies and long-term experience in production. We provide CAD design support as well as complete installation services.