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ACO Therm® 3.0 reveal window: 3-fold - the new ACO standard

Cellar windows from ACO

A large proportion of a house's heat escapes through poorly insulated windows. The ACO Therm® 3.0 reveal window for the basement can also contribute to reducing theannual primary energy requirement and transmission heat loss even more than required by EnEV 2014. With its 4-chamber plastic sash, the 5-chamber plastic frame with thermal break and the profile depth of 82 mm, it achieves a heat transfer coefficient at living room window level. Additional core insulation makes the ACO Therm® 3.0 PHT fit for passive houses.

Discover the basement as a new living space
Cellar windows with thermal insulation ensure well-being

Building a house demands many decisions from the owner. They have to decide on the building style, size and equipment, but also on the basic question of creating a basement. Considering that the basement level is another, complete storey and offers additional living space of up to 40 percent, additional costs of around ten percent are rather low. Whether it is a granny flat, a guest room or a hobby room and storage space: planned with foresight, the basement not only offers more living space, it also increases the value of the property if properly executed and equipped.

Those involved in the construction often must take into account the innovations of energy saving guidelines during planning and execution. Since not only the roof and the facades, but also the basement windows are part of the building's shell, these components are particularly important. A house loses about four times more energy through old cellar windows than through cellar windows that are state of the art. Evenmany basement subsidies (eg. with a Uw = 0.95 W/(m²K) for renovation) are exceeded by more than ten percent by the ACO Therm® 3.0 reveal windows.

To achieve such values, the construction of a basement window is crucial. Not only the material and the construction of the window frame (multi-chamber profile), whose share of the window area is between 15 and 35 percent, but also the type of glazing (2- or 3-pane glazing) plays a significant role in the insulating properties of a basement window. Due to the better heat transfer coefficient of a triple glazed pane compared to a double glazed pane, the temperature on the inner pane is significantly higher, so that the risk of mould on the basement window is significantly reduced. Due to the small difference between the interior temperature and the interior surface temperature of the basement window, air currents and cold air lakes are avoided. This increases the feeling of well-being!

Highlights for architects, planners and property developers
The ACO Therm® 3.0 reveal basement window

The ACO Therm® 3.0 reveal window offers optimum thermal insulation thanks to a continuous multi-chamber hollow profile and a homogeneous structure of the window reveal - a decisive step towards economical and ecological building in compliance with the Energy Saving Ordinance. Good insulation values, installation without additional insulation in the reveal area as well as an integrated window and bottom sill characterise the window, as do the time-saving processing and prepared connections for perimeter insulation and other wall coverings. The ACO Therm® 3.0 is also ideal for renovating basements and adjoining rooms.

Advantages for the planner

  • Extended range of applications for the ACO basement window: standard, passive house-compatible, burglar-resistant and flood-proof* design (*24 hour test in accordance with ift guideline FE-07/01, test report 14-002562-PR01 can be viewed here)
  • Wide range of sizes
  • High proportion of glass
  • Surcharge of 0.05 W/(m²K) may be used for the lump-sum consideration of thermal bridges
  • ACO thermal bridge catalogue showing connection details
  • Complete ACO Therm® system: cellar window, Therm Block mounting plate (insulation) and light shaft

Advantages for the construction trade

  • Simple, tool-free attachment of connection profiles thanks to patented universal interface; enables time-saving and visually flawless connection to perimeter insulation and cellar wall
  • External frame dimensions correspond to the standard building dimension, lintel required for masonry construction
  • Frame depth for every common wall thickness
  • Saves working time - no need to plaster the window reveal
  • Special sizes and depths possible (not for flood-proof* (*24 hour test according to ift guideline FE-07/01, test report 14-002562-PR01 can be viewed here) design)

Advantages for the building owner

  • Protection against temporary water (flood-proof* (*24 hour test according to ift guideline FE-07/01, test report 14-002562-PR01 can be viewed here) design)
  • No building damage due to prevention of condensation fRsi ≥ 0.7
  • Optics of a living room window with extra-large window area for more light incidence