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EcoHeater provided a
quick installation

Block of flats
EcoHeater extract air heat pump

Skvallertorget | Kalmar

The Skvallertorget housing association in central Kalmar wanted to improve energy efficiency at the property and initially considered converting to an FTX system. Its apartments were previously supplied with extract air ventilation only.

The association decided to use EcoHeaters for the property as they could be installed without disturbing tenants and yet the solution they offer is energy-efficient.

The EcoHeater was lifted down through the hole in the roof that was made for the previous extract air fan, and a storage room in the attic could be used as a fan area.


We mainly chose EcoHeater because of the short design time and the fact that there was no need for the installation work to disturb our tenants

Martin Lundin, Riksbyggen Kalmar


About the project

Property owner Riksbyggen
Year of construction 1960
Number of apartments 27
A-Temp 3 300 m2
Energy before 150 kWh/m2
Energy after 82 kWh/m2
ROI time 4,9 years



  • Short design period
  • Installation did not disturb tenants
  • The installation used the previous generation of EcoHeater. The new EcoHeater is 10–15% more energy-efficient than its predecessor.



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