Japanese Excellence

Beautiful as it is, our IWIN-S window is designed for India with Japanese precision. The outer frame can be built into the structure of the building and the installation. It counterbalances the modest size of the room with the expansiveness of the wider world. The framework between window panels is incredibly narrow, measuring only 35mm wide, and the frame and spacer bars between the panes of glass are also narrow, helping the window to picture-frame your view in a most unobtrusive way.

Quality with a difference

Setting standards of residential fenestration quality in India


Water-tight & pollution free Interiors

When you completely reimagine a fenestration product, you get IWIN-S series. A window that makes a powerful statement. Every corner perfectly mated right-angle in the flowing profile. Every frame retains the high strength coating that remains corrosion free, and retains its gloss and richness of colour.

Growth in vehicular traffic, construction activity and stubble burning have created issues of air pollution and dust in India. The recent years have seen a new rise in the level of air pollution affecting various parts of the country. Our aluminium sliding windows are 100% weather-sealed with a leakage-proof design that keeps the pollutants and natural elements such as dust and dirt away.

Not a single element has been overlooked in our new IWIN S window series. Door handles, latching mechanisms, end-stoppers, stays and releases have all been designed for a perfectly clean appearance and improved water-tight, air-tight and acoustic performance..

Patented Japanese technology.
Factory tested for 10,000 openings & closings


Wind Load

2500 pa
Deflection: 1/175
ASTM E 330

Air Infiltration

5.4m3/(h.m2)Maximum at 75Pa
ASTM E 283

Water Tightness

300 pa/350 pa
ASTM E 331.537

Sound Insulation

Grade T-2 (30db)
JIS A 1416

Open – Close Testing

10,000 Cycle No Damage
JIS A 4706

Glass Thickness


Every YKK AP product poses the question of functional and timeless design, not only from an aesthetic point of view, but always from a technical point of view, as all new elements of a building envelope must match the existing components in a system group.

We are YKK AP. We are proud of our windows. The IWIN-S series is a comprehensive range of windows customised for the Indian sub-continent. After decades, performance remains smooth and noiseless even when the monsoon plays havoc.

The IWIN-S series from YKK’s architectural division.