RS-77 HH

RS-77 HH

In response to the growing sensitivity to energy efficiency, new building models are emerging that aim to achieve more sustainable buildings.

Exlabesa’s Channel 16 RS-77 system combines a modern, contemporary look with optimum technical performance, where its security and energy saving features are particularly noteworthy.

  • 16 Groove hardware
  • Concealed hinges option in tilt-and-turn opening, and micro-ventilation
  • EPDM sponge central gasket that reduces thermal transmission and improves acoustic insulation compared to a conventional gasket
Technical information
Air permeability* UNE-EN 1026:2017; UNE-EN 12207:2017 Class 4
Water tightness* UNE-EN 1027:2017; UNE-EN 12208:2000 Class E1500
Wind load resistance* UNE-EN 12211:2017; UNE-EN 12210:2017 Class CE3100
Thermal insulation Uw** UNE-EN 10077-1:2017 Up to 0.9 W/m2K
Sound insulation Rw UNE-EN ISO 10140-2:2011 42 dB (-1;-2)


* Specifications of 2-sashes window of 1230×1480 mm

** Specifications of a 1-sash balcony window of 1100×2200 mm

Maximum recommended dimensions (1 sash): 1400x2400 mm

Maximum recommended weight: 150 kg/sash

Maximum glazing: 62 mm

Polyamide: 35 mm

Concealed hardware and micro-ventilation option 

EPDM sponge central seal 



The RS-77 HH casement window has a contemporary appearance that adds elegance to any building. The sharp straight lines of its structure make it fit the contemporary canons in architecture and reaches its maximum expression in its concealed hinges version.


The casement window system RS-77 HH 16 Groove has 77 mm deep outer frame and 35 mm polyamides for thermal break. It has a multitude of adjustable locking points and its sashes are reinforced with hardware that completely covers its channels.


The RS-77 HH system has been designed to provide high energy efficiency with a class 4, class E1500 and class CE3100 in weather tests. It has the possibility of adding cellular polyethylene foams in the hollow spaces, reaching the best value of the entire range in terms of U values with Uf of 1.6 W/m²K.


The RS-77 HH system offers virtually all types of openings, including folding and tilt-and-turn. A concealed hinge version is available, as well as multiple outer frames and sash sizes to meet specific needs.

Technical manual
CAD sections

Register in our digital space Exlabesa 360 to have TechDocs at your disposal: a complete documentary library with all the technical information about Exlabesa Architecture’s aluminium systems.

Access Exlabesa 360 and enjoy exclusive content and functionalities:

  • Catalogues, tests, reports, sections, DAP, BIM objects…
  • Thermal and acoustic transmittance calculations.
  • Up to date information

Projects using system RS-77 HH

Exlabesa Architectural Lab

A Coruña (Spain)
More info

ERA Residential Centre

Lugones, Asturias (Spain)
More info

Habitat El Clot

Barcelona (Spain)
More info