The main difference between the WDS 76 MD and WDS 76 AD is the number of air chambers (6 vs. 5) and the number of sealing contours (3 vs. 2), respectively. This makes the WDS 76 MD a more technologically advanced system with superior thermal and acoustic insulation, as well as improved strength thanks to its closed-loop reinforcement. The WDS 76 AD is a simpler and more affordable system, while the WDS 76 MD offers higher energy efficiency and better draft protection.
Number of chambers:
The WDS 76 MD has 6 chambers, while the WDS 76 AD has 5 chambers. The higher number of chambers in the WDS 76 MD improves thermal and acoustic insulation.
Sealing contours:
The WDS 76 MD uses 3 sealing contours, providing better airtightness and draft protection, compared to the 2 contours of the WDS 76 AD. Reinforcement:
WDS 76 MD features closed-loop reinforcement, which significantly increases the strength of large structures. WDS 76 AD uses standard reinforcement.
Energy Efficiency and Soundproofing:
WDS 76 MD has a lower U-value, making it the best choice for passive houses and modern new buildings. Both systems support thick insulating glass units, but 76 MD achieves a higher level of soundproofing.
Cost and Purpose:
WDS 76 MD is a more expensive and technologically advanced system, while WDS 76 AD is a more affordable option.