The mulion-transom curtain wall System Vella connect the advantages of weather-resistant aluminium for the exterior and a cozy wood for interior. The supporting structure is formed by rectangular wooden posts with a width of 50,60 or 80 mm. The mullion-transom curtain wall system Vella offers excellent protection for wood, high functionality and long-lasting quality.
| Research range | Result / Norm |
| Water tightness | R750 PN-EN 12154:2002 |
| Air infiltration | Klasa 4 the highest class according to PN EN 12207 |
| Resistance to wind load | to 3000 Pa PN-EN 13116:2002 |
| Thermal isolation | to 1,2 W / m2/ K |
| Width of glass packages | to 46 mm |
| Durability guarantee of the painted coat on the aluminum profiles | to 30 lat |