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2F, Jongno-gu, Bukchon-ro 6-gil 1, 03056 Seoul
Korea, Republic
Telephone +82 2 7459731
Fax +82 2 69599732


Sohyun Jin



Jinsung PARK



Naree KIM



Ublo office



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Our range of products

Product categories

  • 03  Glass products and applications
  • 03.07  Processed flat glass
  • 03.07.02  Transparent glass facade systems
  •  Other facade systems

Other facade systems

Our products

Product category: Other facade systems


As the world’s first personalized ventilation window, Ublo is a cap for glazed facade to block up a hole.

It is a simple, fun, safe, and customized window. Ublo is a circular ventilation window which works without operating the glass part. Like opening lid of a bottle, one can turn and remove Ublo window in need of ventilation. By using less joints, hardware and inexpensive materials Ublo is also a cost-effective window.

Also, operable cover part can be manufactured by 3D printing so that material, finish, handle, additional function can be customized to meet the user’s requirements. Mosquito or air filter net can be installed on the fixed frame part to enhance that comfort of interior space.

Thermal Performance
UBLO has good thermal insulation performance even though there is no exterior metal component exposed. We optionally provide Aerogel, a translucent high-performance insulation material, to be placed in the operable part to prevent condensation. UBLO has thermal transfer coefficient (U value) of approximately 1.3 W/m2K, which is comparable to that of general low emissivity insulating glass.

Air Ventilation
One of UBLO’s major advantages is the freedom to select the perforation location for air ventilation. Generally, by installing 2 UBLOs, one each at the top and at the bottom part, the height difference creates air pressure difference which in turn optimizes indoor air ventilation.

Wind Resistance
UBLO fixed frame is installed securely to the glass using structural silicon sealant. The operable part attaches into the fixed frame by a sturdy fastener that is enough to resist a harsh typhoon. UBLO obtained the highest-grade (grade 360 with test pressure of 3600 Pa) KS certification based on the KS F 2293:2008 test.

Water Tightness
UBLO frame and gasket are delicately designed with water drainage details to achieve perfect water tightness. UBLO obtained the highest-grade (grade 50 with test pressure of 500 Pa) KS certification based on the KS F 2293:2008 test.

Air Tightness
We tightly compressed EPDM gasket between the operable and fixed parts to achieve good air tightness. UBLO obtained the highest-grade KS certification based on the KS F3117:2015 test.

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About us

Company portrait

Ublo was invented by Robert-Jan van SANTEN, Dutch architect. 
He set-up Ublo Inc. with Naree Kim in 2018.

Ublo proposes windows to be adopted to specific needs of each user. And it can make your space absolutely special.

Ublo was presented at the UABB Biennale 2018 in Shenzhen, China and at the GPD Conference 2019 in Tampere, Finland.

Please find more details in our website below.