Energy Requirements
Smart and resource-efficient

Our system implements  state-of-the-art, sustainable technologies for energy efficiency and a minimum ecological footprint.

Model building location 7000 Eisenstadt, Austria
© PORR

Sustainable Energy Supply

The energy planning was supported by a detailed thermal simulation to precisely determine energy requirements and optimally tailor them to the building’s usage. Heating and cooling are provided by a high-performance heat pump on the roof in combination with fan coil systems, which allow for individual room temperature control.

A particularly innovative concept is also implemented for hot water production: the energy from toilet exhaust air is used to efficiently heat water, while LED lighting in all rooms reduces electricity consumption.

The result: low operating costs, a comfortable indoor climate and a sustainable contribution to climate protection. The energy-efficient design ensures that heat loss is reduced and available energy is optimally utilized - year-round and permanent.

These measures result in a residential building that combines maximum energy efficiency, comfort and sustainability—a modern home for an environmentally conscious lifestyle.

Gernot Wagner
Managing Director
Example: Energy Performance Certificate for a Model Building, Location: 2442 Ebreichsdorf

Energy Balance
Eco-friendly and Comfortable

Our buildings stand for the highest energy efficiency. Depending on the building’s shape, orientation and local climate, they meet the requirements for energy efficiency class A or A+/++. Through an optimized building envelope, modern building services and the targeted use of renewable energy, energy consumption is reduced to a minimum. For users, a building with a good energy balance means: 

  • significantly lower heating and energy costs
  • high living and user comfort
  • long-term value retention of the property
  • compliance with current and future energy and environmental standards

This results in buildings that not only impress but are also ideally equipped to meet tomorrow’s requirements—economically, ecologically, and in terms of comfort.

Model building, location 7000 Eisenstadt, Austria
© PORR

Energy costs
significantly lower

The building achieves a very low total energy demand of only around 35–40 kWh/m²a of usable floor area, thereby meeting the high energy standards of modern new buildings at  passive house level.

A clear example illustrates what this means in everyday life:
For an apartment with 55 m² of usable floor area, this results in a monthly energy cost of only approx. 45–50 euros—including heating, lighting and household appliances. This ensures, that the building combines sustainable construction with high living comfort and permanently low operating costs.

*Example: Model building, location 7000 Eisenstadt, Austria

Model building at location 1100 Vienna, Austria, with 60 residential units
© PORR

Operating costs
economically attractive

With less than 2 euros per square meter* of living space, the projected operating costs are significantly below the industry standard for conventional residential buildings.

This is made possible by the building’s high energy efficiency as well as consistent sustainable planning and execution.

For residents, this means noticeably lower running costs, long-term cost-effectiveness and a living environment that optimally combines comfort and sustainability. Thus, energy-efficient construction pays off not only ecologically but also financially every month.

*Example: Model building at location 1100 Vienna, Austria, with 60 residential units