Kömmerling 88 MD represents the summit of engineering in PVC systems. An 88 mm mounting depth combined with seven air chambers inside the profile unlocks extraordinary thermal insulation. The window effectively shuts out external heat, holding the indoor climate steady even when air conditioning isn't running.
It is built to take heavy triple-glazed units up to 56 mm thick. Whether your project calls for Passivhaus certification or you simply want the very best the glazing industry offers today, 88 MD stands without rivals.
Brand
Kömmerling — European leader in PVC profile production with over 125 years of history. Their windows combine German precision with maximum energy efficiency, making them the best choice for projects requiring uncompromising quality.
More about KömmerlingTechnical Specifications
Top-tier defence against heat and noise. The thickest, most capable system for anyone determined to cut their air conditioning costs to the bone. Your home will enjoy complete silence, even with windows overlooking a busy road.
Core system specifications:
Glazing and infill choices:
Maximum size limits:
Tested performance values:
Top-tier defence against heat and noise. The thickest, most capable system for anyone determined to cut their air conditioning costs to the bone. Your home will enjoy complete silence, even with windows overlooking a busy road.
For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How Kömmerling 88 MD stacks up against the closest matches from other brands.
| Specification | Kömmerling 88 MDThis profile | Rehau Geneo PHZ | Cortizo A 84 Passivhaus | Schüco LivIng 82 |
|---|---|---|---|---|
| Brand | Kömmerling | REHAU | Cortizo | Schüco |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 88 mm | 86mm | 84 mm | 82mm |
| Chambers | — | 6 chambers | — | 7 chambers |
| Glass unit, max | up to 56 mm | 53mm | up to 56 mm | up to 52mm |
| Thermal (Uw) | ≤ 0.7 | 0.73 | ≤ 0.66 | 0.8 |
| Sound (Rw, dB) | ≈ 50 Rw(dB) | ≈50 Rw(dB) | ≈ 48 Rw(dB) | ≈47 Rw(dB) |
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FAQs
The 88 MD is built on an 88 mm build-in depth housing a 7-chamber profile with insulating thermal inserts inside the chambers. A heavy-duty closed steel section handles extreme loads, while the frame reaches Uf 0.95 W/m²K and the window Uw up to 0.72 W/(m²·K), rated energy class A++.
MD means a triple-seal layout that adds a dedicated rebate gasket on top of the two perimeter seals. This third circuit delivers maximum compression around the leaf, which is what lets the 88 MD reach a Uw of up to 0.72 W/(m²·K) and acoustic damping of up to 48-50 dB while keeping the sash tightly closed against air and water.
The rebate accepts glazing units up to 56 mm thick. That depth fits triple-chamber insulating units filled with krypton or argon, and even next-generation vacuum units. The extra panes and gas-filled cavities are what drive both the Uw down to 0.72 W/(m²·K) and the near 50 dB sound reduction.
Yes. It is a certified Passivhaus system, tuned for zero-energy homes. The combination of an 88 mm depth, 7 chambers with thermal inserts, and a frame value of Uf 0.95 W/m²K meets the thermal envelope a passive house demands, and it is engineered for 50+ years of service.
The 88 MD steps up from the 76 mm line on every front:
At 720-900 €/m² it is the priciest window in the range, and in mild climates its Uw 0.72 W/(m²·K) can be overkill versus an Xtrem 76 MD at 1.0 for far less. Its glazing capacity (up to 56 mm) adds weight, so leaves are capped at 2500 mm tall and 1500 mm wide; larger sliding spans suit a PremiSlide or PremiDoor instead.
