Case Studies
Multifamily House Dünenweg
Hamburg, Germany
Code: CS25
Original situation
The building is located in the Dünenweg district of Hamburg’s “Ladenbeker Dreieck”. It consists of 18 residential built in 1961 in double-wall brick construction. The roof and top floor ceiling were renovated in 2016, when the basement ceiling was also insulated from below. The building is connected to a local heating network with heat distributed via radiators. The façade and windows are being modernised as part of the OutPHit project.
Renovation approach
The renovation is currently in the design phase.
Modernisation proposal
The windows and façade will receive an energy upgrade and all flats will be equipped with a heat recovery ventilation system. A prefabricated façade including both windows and ventilation elements will be employed. Importantly, solutions to reduce the thermal bridges of the building’s balcony elements will be elaborated and a refurbishment roadmap will be drawn up containing requirements and recommendations for further refurbishment steps. The goal is to achieve the EnerPHit Standard at the end of all renovation measures.
PHPP verification sheet before retrofit
| TFA | existing treated floor area (usable floor space) |
1335.0 m2 |
|---|---|---|
| Space heating | Heating demand |
117.0 kWh/(m2a) |
| Heating load |
56.0 W/m2 |
|
| Space cooling | Cooling & dehum. demand |
– kWh/(m2a) |
| Cooling load |
– W/m2 |
|
| Frequency of overheating (> 25 °C) |
0.0 % |
|
| Frequency of excessively high humidity (> 12 g/kg) |
0.0 % |
|
| Airtightness | Pressurization test result n50 |
5.0 /h |
| Non-renewable Primary Energy (PE) | PE demand |
207.0 kWh/(m2a) |
| Primary Energy Renewable (PER) | PER demand |
357.0 kWh/(m2a) |
| Generation of renewable energy (in relation to projected building footprint area) |
– kWh/(m2a) |
|
| EnerPHit classic |
no |
PHPP verification sheet after retrofit
| TFA | existing treated floor area (usable floor space) |
1335.0 m2 |
|---|---|---|
| Space heating | Heating demand |
68.0 kWh/(m2a) |
| Heating load |
40.0 W/m2 |
|
| Space cooling | Cooling & dehum. demand |
– kWh/(m2a) |
| Cooling load |
– W/m2 |
|
| Frequency of overheating (> 25 °C) |
0.0 % |
|
| Frequency of excessively high humidity (> 12 g/kg) |
0.0 % |
|
| Airtightness | Pressurization test result n50 |
5.0 /h |
| Non-renewable Primary Energy (PE) | PE demand |
149.0 kWh/(m2a) |
| Primary Energy Renewable (PER) | PER demand |
235.0 kWh/(m2a) |
| Generation of renewable energy (in relation to projected building footprint area) |
– kWh/(m2a) |
|
| EnerPHit classic |
no |
Key facts
Building typology
Multi family dwelling
Existing treated floor area (usable floor space)
1 335 m2
Building owner
Wohnbaugenossenschaft eG Bergedorf Bille
Consulting outphit partner
Passive House Institute
Project status
Planning phase
Contact
Tanja Schulz
Passive House Institute
Tηλέφωνο: +49 6151 8269939
E-Mail: tanja.schulz@passiv.de