In Norrköping, the main argument was the energy-saving in a residential building with apartments built in 1971 and refurbished in 2014. The KV. Granen in Norrköping consists of 5 staircases with six floors where each floor has four apartments spread over two double rooms and two single rooms with a kitchen, bathroom and a dressing room. The goal was to save 50 kWh m2, but calculations show that the potential can be higher than that. New supply and exhaust air ducts have been drawn to each apartment by using stroller storage that runs across all floors of the stairwell and placed a new mechanical ventilation unit with rotary heat exchangers in the attic.
Moisture supply Set Point for avoidance of moisture damage in Swedish multifamily houses (link here)
Article by Abdul A. Hamid published in 2015.
About a new DCV system developed especially for the renovation of approximately 1.3 million apartments were built in Sweden from 1950 until 1975. The DCV automatically regulates the air change rate for each dwelling based on measurements of the indoor air. One of the measured parameters is moisture supply.
Article by Abdul A. Hamid.
A dual-mode demand-controlled ventilation system has been developed for alleviating the renovation process for multifamily houses. With a central fan, but decentralised control boxes including dampers placed outside each apartment, the system regulates the air change rate for each apartment individually based on two indoor air parameters: moisture supply, and volatile organic compounds (VOCs).
PhD. Thesis by Abdul A. Hamid published in 2017, Lund University.
Focusing on a practically applicable and realistic method for evaluation of renovation measures, based on empirical data from case studies. This with regards to moisture loads on the building materials and emission loads in the indoor climate based on risks related to these. The new DCV-system and cooker hoods were installed for 24 apartments within Kv. Granen in Norrköping. Distributing boxes, main ducts to and from the AHU in the attic, and serviceable components were installed in the multi-storey staircase space (hallway) and the attic.