Green Commercial buildings

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Panda Office building
'Le Donjon' in Gouda (NL)

address:
Gravin Beatrixstraat 34,
2805PJ Gouda
The office may use the ® WWF Panda symbol because the building is constructed according to the brief for Panda offices.The brief:
Energy performance EPc < 0.75
45% less energy than the building code requires
Application of a solar system
DHW or PV system
Sustainable Building Approach
FSC-certificated wood
Examination of design and construction
by an independent consultant

Sustainable aspects :

  • Energy conservation

  • Low energy appliances

  • Application of solar energy

  • Water conservation

  • Sustainable building materials

  • Flora and Fauna
   

Energy conservation

Energy performance ratio = 0,6 (60% less than the building code requirement of 1,6)
Envelope Rc = 3,5 (cellar Rc = 2,5)
Glass U = 0,98 (zuid en west)
Glass U = 1,1 (noord en oost)
Entrance buffer
High efficiency stove NEFIT
Short pipes
Kantherm ES 1000 heat recovery unit
Cenvax Solotherm Building Managment Computer
   

Low energy appliances

Low energy refrigerator A type
Low energy dishwasher A type
Flat screens for workstations
Signal switches for computers (no stand-by energy)
Low energy artificial lighting
Daylight steering Etap ELS system
True-lite(daylight spectrum) lamps
Presency switches
 
 
   

Ventilation and passive cooling

Ventilation with heat recovery
Summer night ventilation
No lowered ceilings in workspace
Use of thermal mass of the building
Integrated solar shades

 
   

Application of solar energy

More glass on south
Less glass on North, West and East
Use of daylight
Integrated solar shades
Solar hot water system
PV system 6.2 kW (protect the eave of the building)
2nd flat roof PV system 3 kW

 
   

PV system

Tailor made PV modules
The system protects the eave and the facade of the building
A second 3 kWp system (new product development) is placed on the roof (see left)
   

Water conservation

Use of rainwater for the toiletflush
Water conserving toilets
WSS booster in the sewage pipes
Rainwater retention pond

 

Sustainable building materials

Facades limesandstone and brick
Foundation and slabs concrete
Window frames Nordan Norwegian pine (FSC/PEFC) with aluminium cover (no painting)
(download Environmental Declaration)
Luxaflex blinds made of recycled aluminium
EPDM water protection - no lead
Inside Dutch poplar wood
Natural paint (line seed oil) AURO
Sewage system PE - no PVC

Flora and Fauna

Swallow's nest boxes
Bat boxes
Roof garden
Natural plants
Espalier trees on the west
(shading + wind protection)
Retention pond

 An ecological assesment of the building has been carried out by NIBE (Dutch Institute for Building Biology and Ecology). NIBE used the Greencalc method to calculated environmental sustainability of the building.
GreenCalc is a computer model, developed by NIBE Consulting for office buildings and other commercial buildings. The programme is divided into four modules: materials, energy, water usage and mobility. The environmental accessment is translated into costs per m2 for the total lifecycle of the building (construction, exploitation and demolition).
GreenCalc calculates the environmental costs for the materials according to the TWIN-model.

 In the GreenCalc calculation the module material is subdivided into raw materials, pollution, waste, environmental nuisance, ecological effect, energy, re-usability, repairability and lifespan. GreenCalc gives a clear view of the environmental cost over the different structural parts of the building and determines the total CO2-production as a result of the material usage.

The module energy consists of different parameters: building use, heating-, cooling-, ventilation- and hot water system, type of artificial lighting, use of solar energy, etc. These parameters are on itself the base for the Energy performance Ratio (EPC), which is an energy efficiency calculation based on the energy consumption within the building.

Calculations made with Greencalc v.2.0 give a total score on a scale from 1 - 2000. The average building built in 1990 has a score of 100 and the goal for 2050 is buildings with a score of 2000.

The assesment for this building shows the result of 312.

Early 2001 there are no buildings that have a better score. The highest score was 292 for a building after construction and 817 for a renovation of a building (still in design phase).

The watermodule of GreenCalc calculates the effects on waterusage. Parameters are the type of sanitary, use of fresh water or the substitution of fresh water by a "grey water" circuit (use of cleaned waste water for toilet flush, garden, etc.).

Mobility looks at the location of the building in relation to its environment, infrastructure, connections and distances to public transportation.

Go to:

The exterior

The interior

Plans and The garden

Our client is: BEAR Holding BV