Installed new IVT Vent 302 in July 2019. Right now it is around +3C outside and inside the house it is between 15 and 17 C. Called SENS Energi Komfort and they promised to send a technician. The technician came and quickly looked at the pipes under the system and said everything was ok - will probably take couple of days for the system to catch up. One month later it is even colder and very humid inside the house. Emailed SENS Energi Komfort  2 days ago and asked to fix the problem. Still got no response from them. That’s not a good service in my books. Highly NOT RECOMMENDED!