Case Study: nZEC - New construction of 54 dwellings in Norra Järnvägsgatan, Falun, Sweden
Name of organisation: KopparStaden AB
Stage of development: completed
Year of finalization: 2012
Type of project: construction
Area: urban
Scale: group of buildings
Type of building: Apartment in a block of six to ten stories
Number of units/dwellings: 54
Tenure: social rental
Street: Norra Järnvägsgatan 7
Postcode: 791 35
City: Falun
Region/ County: Dalarna County
Country: Sweden
Last Update: 14.04.2015
Short Description
Vitsippan are passive, meaning they are heated by the energy already present in the houses, from the people and household appliances.
It saves both energy and money, and provide a comfortable indoor climate because the walls have the same temperature as the indoor air. Living in the neighborhood Vitsippan is to choose a comfortable accommodation.
The building has an elevator and intercom and the apartment obviously own a dishwasher, washer and dryer. Each apartment has its own heat exchanger that gets its heat from biomass from energy supplier. Tenants pay their own use of heat, water and electricity.
Key Elements
Certification
Passive house, energy label A.
Air Tightness
Very tight house projected value 0,15/l/s measured value 0,08 l/s.
Windows and Shading
Triple paned U-value 0,8.
Ventilation
Mechanical ventilation with heat recovery.
Heating and Hot Water
Individual heat exchanger for every apartment.
Other Renewables
Biomass heated district heating.
Funding
Total project cost: 108 million SEK including VAT 27 000 SEK per square meter.
Main Results
- Its to early to say we had some trouble to rent out the apartments at first but its getting better now. The question is are the tenants willing to pay for a passive house?
Lessons learned
- We have learned that it is important that we have an eye on the process during the construction period and not just hand over to the contractor.
- We could tighten up some things at an earlier stage and avoid standing with a bigger problem when you move in, such as swinging hot water temp. This is not completely solved, now anyway on a smaller scale.
- Then we have a process for evaluation / verification to be done to ensure that the houses meet the requirements.
- We also have to see how the concept of cold rent and own subscriptions for tenants work in a multi-family dwellings.
Additional Information
Ms Therese Rydstedt
SABO - The Swedish Association of Municipal Housing Companies
E-mail: therese.rydstedt@sabo.se
Web: www.sabo.se
