Three seals in one assembly
MD denotes centre sealing. The IDEAL NEO MD variant compared has three seals, while IDEAL NEO AD has two. The additional sealing plane runs within the frame and sash assembly. It is a feature of the cross-section and of how the components work together when the window is closed.
Look for the full system name and the corresponding drawing in the documentation. NEO alone describes a wider family of solutions. If you receive two quotations, check that both specify MD. Otherwise, a price difference may reflect a different construction even if the basic profile dimension appears similar.
Centre sealing and a classic shape
IDEAL NEO MD retains a visible, non-flush sash. It is an option for people considering centre sealing with a classic window outline. Assess the exterior appearance separately from the cross-section: a photograph of a seal does not show the proportions of the complete window.
Ask for external and internal window elevations. Mark the planned divisions and opening directions. When comparing MD with NEO View, consider sash visibility: View conceals it behind the frame externally. Both variants compared have centre sealing, but they shape the glazing outline differently.
Seal count does not replace performance results
The catalogue gives a profile Uf of 1,1 W/m²K for IDEAL NEO MD. Reference Uw is 0,76 W/m²K for a 1230 × 1480 mm window with Ug 0,5 W/m²K glazing. These reference conditions are part of the information and should be read alongside the figure rather than ignored as a minor footnote.
Acoustic performance, air and water tightness, and burglary resistance must be confirmed for the specific window. The full configuration matters, including glazing, dimensions, equipment and manufacture. Request data for the product being quoted. This distinguishes figures describing the catalogue profile from those applying to the windows intended for your building.
Preparing a discussion about MD
Start with priorities: appearance, thermal comfort, acoustic requirements and operation. Then provide dimensions, quantities and a drawing of the divisions. If a designer has specified requirements, pass on the original wording so the seller can address the precise performance criteria.
Specify IDEAL NEO MD when contacting KM Okno and ask for confirmation of finish availability and the possible configuration. A clear quotation connects the construction's benefits with the actual supply scope. The third seal then becomes a deliberately chosen window feature rather than the sole argument behind the entire purchase decision.
