heroal W 77 HI

Aluminium window system suited for passive houses

The window system heroal W 77 HI offers you small face widths, and at the same time, thanks to its modern design, achieves thermal insulation values required for passive houses. That means you benefit from lower heating and energy costs and, in some countries, become eligible for attractive state subsidies. Compared to similar aluminium windows suited for passive houses, the heroal W 77 HI stands out for its extremely small face widths. They provide for an aesthetically appealing look and more transparency, and improve the overall impression for your home. Aluminium windows of the heroal W 77 HI range also offer you certified burglary resistance; their resistance class RC3 exceeds the recommendations of the police. For a safe and comfortable home.

  • Suitable for passive houses
  • Filigree design
  • Burglary resistance class RC 3

System dimensions

Visible profile width [mm]

Leaf profile
33 - 67
Sash/frame combination

System properties

Glass filling strength [mm]
Max. leaf weight [kg]
Max. leaf heights [mm]
Max. leaf widths [mm]

Performance characteristics

0,95/120 Thermal insulation [Uf in W/m2K] / Profile width [mm]
4 Air permeability
> 0,72 Heat insulation (Uw in W/m2K) / Profile width [mm]
9A Resistance to driving rain
C5/B5 Wind resistance
1-5 Soundproofing class
RC 3 Resistance to burglary
1 Operating forces
5 Impact resistance
4 Mechanical resistance
Load-bearing capacity of safety equipment
3 Continuous function

* Uw value in accordance with DIN EN ISO 10077-1; calculated using an element size of 1,230 x 1,480 mm; standard visible profile width

!) Application-specific special approvals for oversized elements from heroal


The heroal promise

When it comes to how we live and work, the most important thing is having choices. heroal knows that. As a family-run company with more than 140 years of experience, we believe that when it comes to quality, there are no compromises. That is why our products give you a way to create ideal solutions for nearly any requirement. As a technology leader, we believe that quality means more efficiency, more reliability and more performance – solutions that are "SIMPLY. BETTER."

  • over 3,500 specialist partners worldwide
  • products with tested quality
  • family-run company with a long tradition
  • made in Germany
  • personalised design
  • comprehensive range of services
  • superior technical solutions