The elegance of a hidden sash at an affordable price – MB-79N US

Prestige at your fingertips

EKO-OKNA ensures that price does not limit design ambitions. The MB-79N US aluminium window and door system, newly introduced to the product range, is a solution many clients have been waiting for and has strong sales potential from day one. It includes all key advantages:

» a hidden sash, delivering the elegant look of fixed glazing with full operational functionality,

» good thermal performance, which—especially in the SI variant—meets high customer expectations,

» an attractive price point, effectively removing one of the main barriers in the premium segment.

Warmth, tightness, and the well-known MB product family—MB-79N US is a modification of the proven and highly regarded MB-79N system, ensuring familiarity and reliability. Additionally, three drainage options are available, allowing selection according to client requirements.

A response to all customer needs

At EKO-OKNA, the MB-79N US is not just a window, but a complete set of benefits that can be offered to clients:

» lower heating bills – high thermal performance of the system and glazing up to 52.5 mm, combined with warm edge spacers on promotion, significantly reduce energy losses,

» cooler interiors in summer – the use of selective glazing, such as Guardian Sun, helps block excessive solar heat, reducing indoor temperature by up to 4°C*,

» reduced window condensation – using Guardian ClimaGuard Dry glass within the insulated unit lowers the risk of condensation, highly valued in guesthouses, offices, and public buildings,

» privacy and shading with integrated blinds – EKO-OKNA integrated blinds are safely enclosed inside the glazing unit, protected from dust, and remotely controlled,

» smart privacy control with Digi Glass – glass that changes transparency on demand, from full privacy to full transparency in a fraction of a second, with low energy consumption and optional division into four independently controlled segments.

EKO-OKNA enables customers to be convinced by functionality that can be configured in cooperation with the sales department or independently at any time, day or night, via the eko4u B2B tool.

*Based on an independent simulation study conducted in Wrocław by Group14 Engineering, comparing two identical rooms with triple glazing—one with Guardian Sun 39 glass and the other with standard thermal insulation glazing—under identical building and climatic conditions, according to the report “Energy Modeling of Internal Room Temperatures For Guardian Glass, Phase 2, 16 December 2025”.