best cases dgnb and leed

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Certified with DGNB GOLD label 01/09

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Econcern Headquarter Köln (2009)

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Etrium =Energy efficiency + atrium

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Atrium for heating, ventilation and light

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

•3 stories.•Square shaped (38m x 38m). Excellent facade/volume ratio.•High daylight coeff for natural light.

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ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

•6 areas can be closed off and rented separately.•3750m effective area. •Room for 150 employees.

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

photo voltaic system: 32,4 kW = 30.000 kWh/a

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Solar thermal water for domestic use

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Rain water reservoir to flush toilets etc

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Cross ventilation Heat exchanger to recycle heat energy of used air.95% efficient heat recovery

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

concretecoolCross ventilation Heat exchanger to recycle heat energy of used air.95% efficient heat recovery

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

48kW groundwater heat pump

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

summer

winter

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

PHPP approvedPrimary energy: 116 kWh/m2/a

70% < than conventional office buildingsHeating: < 10kWh/m2/a

1L oil/ m2/a (5 times less)

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

BofA Tower, NYC Cook Fox, 2009

LEED PLATINUM certified

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

BofA Tower, NYC Cook Fox, 2009

LEED PLATINUM certified

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

If you don't build green, you're building obsolete,"

Douglas Durst, Developer BofA TowerBuilding Introduction video

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

Faceted crystal exterior •deep double-walled insulated facade•to optimize daylight transmission to street level.

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

natural elements relate to human scale of the street.

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

biophilia - everyone gets light.•floor-to-ceiling windows (285cm)•glass inner walls, so that even people stationed near the core of the building will be able to look outside.

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

The mixture used in the tower concrete is 55% cement and 45% slag( a byproduct of blast furnaces).

The use of slag cement reduces damage to the environment (One ton of cement produced emits

about one ton of carbon dioxide into the atmosphere.)

ENERGY | HCU REAPDGNB | GOLD CERTIFIED OFFICE BUILDING

Rain water collectioncombine roof-captured rainwater with the grey water from the building's washroom sinks, condensation from the tower's air conditioning and from the steam purchased from the utility company ConEdison used to flush the toilets and run evaporation panels that help cool the building.Rain water collection

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

ventilation•Under Floor air ducts (17 C vs. 12 C ceiling ducts)•Thermostat for each office (room) for individual regulation

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

air filter for NYC"We will take in four times as much air as New York codes require, and the air we expel will be much cleaner than what we take in."The greater volumes of air make it possible to flush more VOCs (volatile organic compounds) out of the air, diminishing the likelihood of "sick building syndrome" sometimes blamed on imperfect air filtration systems.He says that people working in the Bank of America Tower will breathe air cleaned of 95 percent of its particulate matter instead of the 35 percent typical in office buildings.

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

CogenerationA 4.6-megawatt fuel-cell cogeneration plant

provides part of the base-load energy requirements.

“Cogeneration (also combined heat and power, CHP) is the use of a heat engine or a power station to simultaneously generate both electricity and useful heat(…). By-product heat at moderate temperatures (212-356°F/100-180°C) can also be used in absorption chillers for cooling” (source: wikipedia.org).

ENERGY | HCU REAPLEED | GOLD CERTIFIED OFFICE BUILDING

Sustainability = economical efficiency= occupant efficiency•$1.2 billion for the tower. •2 to 3% for environmental factors.•Payback within four years through saved energy expenses.•The building is built to environmental codes believed to be in place in future years, eliminating the need for costly modifications.