Client:
CAL-Classic-Haus
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Irma-Pickert-Weg, Hannover
Description
Step by step, CAL-Classic-Haus has risen to the challenges which ever-changing legal standards for insulation and energy savings have presented over the past few years, and developed a building concept which exceeds the strict specifications set by the Passivhaus Institute in Darmstadt. This process includes not only adapting construction methods and carefully integrating materials, but also maintaining a qualified staff. The well-trained team knows their craft otherwise they would not be able to position the first wall of a two-story building and invite people to its topping out ceremony on the very same day. Walls and roofs are pre-finished in the company's own manufacturing facilities under strict quality control supervision. Even though they are only 47 cm thick, the multi-layered wall constructions achieve optimum heat insulation values and, together with the service cavity, create ideal conditions for an airtight building shell. An air heat pump with integrated 200-liter storage units, a heat exchanger, and integrated solar energy components combine to form an efficient and compact heating, hot water, and ventilation device.
Parties involved
Design:
js-architektur
Building data
Building type:
Single-family home
Location:
Hannover-Wettbergen
Year of construction:
2011-2012
Heated usable space:
181 m²
Subsidies:
KfW, proKlima
Building shell
Exterior walls:
premade wood-panel elements with service cavity plus 36 cm total mineral fiber insulation and breathable wood fiber panels; HTC = 0.09 W/(m2K)
Heat bridging-free connector details were developed for sockets, ceiling connections, eaves, and gableboards.
Windows:
Plastic windows with heat-insulating triple glazing; HTC = 0.76 W/(m2K) including installation related heat bridging
Roof:
premade wooden panel elements with 40 cm total cellulose insulation; breathable exterior wooden softboard panels; HTC = 0.09 W/(m2K)
Floor Plate:
16 cm polyurethane insulation on floor plate, covered by screed with floorboard heating; HTC = 0.14 W/(m2K)
Summertime heat protection:
exterior sun protectors
Building technology
Heating and Ventilation:
Compact heat pump device consisting of an air/water heat pump for heat and hot water with integrated storage unit and integrated heat pump; 6.8 m2 solar heating system
Air conditioning:
Nighttime ventilation via windows in summer
Calculated values
Calculated method: Passivhaus planning package
HEATING ENERGY NEEDS:
15 kWh/(m2a)
TOTAL ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
Electricity
28 kWh/(m2a)
PRIMARY ENERGY NEEDS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
72 kWh/(m2a)
CO2 EMISSIONS FOR HEATING,AIR CONDITIONING,DHW,ELECTRICITY:
17 kg/(m2a)
