Stakeholders

Function : Designer

ARCHITEKCI DAWIDCZYK & PARTNERZY

Function : Construction company

PBM POLUDNIE SA

Contracting method

General Contractor

Owner approach of sustainability

BOUYGUES IMMOBILIER POLSKA sp. z o.o. - a company from the French BOUYGUES S.A. Group, is the developer of this project. Sustainable development forms essential part of the Group’s strategy, with a particular emphasis on the corporate social responsibility and environmental protection. BOUYGES IMMOBILIER implements these policies in a formal and organized manner, in accordance with respecting all shareholders’ interests, as well as maintaining employees’ satisfaction. Group’s efforts in this field have been visible in a variety of residential and office projects delivered within the last years, and also have been confirmed and appreciated by several prizes and certificates, including the HQE certificate.

Architectural description

The ACCENT VERT & ACCENT ECO project is located on the outskirts of Warsaw on former agricultural land, in a neighbourhood that is today rapidly developing and will soon be just next to the new metro line. The buildings are located just a few hundred metres from one of the main North-South motorways in Poland, making it easy to reach from the centre of Warsaw. Situated near Gorczewska Park, the project already benefits from all the infrastructure in the Bemowo district such as schools, businesses, shopping centres and service stations.
This scheme consists of two multi-family residential buildings with 292 apartments in total. Moreover, under each building there is an underground carpark and there are multiple places dedicated to storing bikes on the surface.
The neighbouring area of Bemowo district (Chrzanow estate) is one of the most rapidly changing areas in Warsaw in terms of new residential developments.
Both building have 5 floors with 1-, 2- , 3- and 4-bedroom apartments with surface between 26 and 75 sqm. Each apartment has own balcony, terrace or garden.

Energy consumption

• Primary energy need : 90,00 kWhpe/m².year
• Primary energy need for standard building : 105,00 kWhpe/m².year

Calculation method : Other

Breakdown for energy consumption :

46% Heating and ventillation
54% Hot utility water

More information :

Primary energy need for the building, as well as the one for standard building have been assessed by an independent auditor in accordance with Polish legal requirements regarding energy certificates for new buildings (EU compliant).

Envelope performance

• Envelope U-Value : 0,23 W.m^-2.K^-1
More information :

No average U-value available. The number presented (0.23) concerns external walls of reinforced concrete with styrofoam insulation in the Accent Vert part.

For other parts it looks as folllows:

- Flat roof (reinforced concrete with styrofoam) - achieved 0.15 (required 0.2);
- External walls (Reinforced concrete with styrofoam and mineral wool) - achieved 0.23 / 0.25 (required 0.25);
- External windows (PVC) - achieved 0.9 / 1.3 (required 1.3);
- Windows and external doors (aluminium) - achieved 1.3 (required 1.3);
- Arcades (above the underground carpark ramp, made of reinforced concrete with styrofoam) - achieved 0.16 (required 0.2);
-Ceilings (reinforced concrete with styrofoam and mineral wool) - acheived 0.17 (required 0.25);

Systems

Heating system :
• Urban network
Hot water system :
• Urban network
• Solar Thermal
Cooling system :
• No cooling system
Ventilation system :
• Natural ventilation
• Free-cooling
Renewable systems :
• Solar Thermal

GHG emissions

• GHG in use : 30,22 KgCO₂/m²/year
Methodology used :

Assessed by an independent auditor in accordance with Polish legal requirements regarding energy certificates for new buildings (EU compliant).

Product

Viessmann solar heating system - DIS 50
Viessman
http://www.viessmann.com/com/en.html

Product category : HVAC, électricité / heating, hot water

There are ten solar heating system panels installed on the roof of Accent Eco, with nearly 5 sqm of surface each.

Because of its innovative character and contribution to decreasing the pollution, the product received an undivided acceptance of all members of the project team.

Dynamic thermal modelling by Arup
ARUP
Ove Arup & Partners International Ltd Sp. z o. o. Oddział w Polsce

Product category : HVAC, électricité / ventilation, cooling

The DTM was used to analyse the building and its location (including sun path and shading analysis) and to provide a prediction of space temperatures and comfort conditions in the interior spaces.
The modelling has been carried out using the Warsaw weather data file to ensure that the model accurately reflects the location of the building.
The weather data used by IES include 8760 hourly records which enable the software to carry out dynamic building performance simulations.
The three-dimensional detailed thermal model has been created using plans, sections, elevations and general arrangement drawings provided by the project architects. The building’s orientation has been adjusted according to the site plan.
The results indicate that for this project, external conduction losses are only 6% of the total energy consumption for heating purposes. Improvement of external fabrics insulation resulted in unnoticeable energy savings when compared to increased investment costs.

not applicable

Urban environment

The ACCENT VERT & ACCENT ECO project is located on the outskirts of Warsaw on former agricultural land, in a neighbourhood that is today rapidly developing and will soon be just next to the new metro line. The buildings are located just a few hundred metres from one of the main North-South motorways in Poland, making it easy to reach from the centre of Warsaw. Situated near Gorczewska Park, the project already benefits from all the infrastructure in the Bemowo district such as schools, businesses, shopping centres and service stations.

This scheme consists of two multi-family residential buildings with 292 apartments in total. Moreover, under each building there is an underground carpark and there are multiple places dedicated to storing bikes on the surface.

The main target of project's team was to create a pleasant environment. Apartments exposure has been set on the advantageous east-west axis ensuring lots of natural daylight inside. Attractive greenery and small architecture, presence of a water reservoir and vegetable garden are other ‘green’ aspects of this scheme.

The developer has also implemented solutions targeted at promoting ‘eco-mobility’ - provision of multiple bicycle racks for inhabitants and the bike path on the adjacent Batalionow Chlopskich st. delivered few years ago by Bouygues Immobilier Polska.

Furthermore, simple and aesthetic shape of buildings, designed in line with local zoning constraints, create pleasurable entourage advantageous for inhabitants’ rest. Buildings’ visual attractiveness has been achieved by its proportions, eye-catching arrangement of windows on the façade and unique shape of balconies.

Land plot area

Land plot area : 16 269,00 m²

Built-up area

Built-up area : 25,00 %

Green space

Green space : 4 868,00

Parking spaces

- over 180 bike racks on the surface.
- 250 parking places in underground carparks below buildings for its inhabitants.
- 64 external parking places in total, including 20 publicly available and 8 for handicapped.

Building Environmental Quality