Most people bring 90% of their time indoors. Therefore, it is important that the indoor climate is in order because a poor indoor climate can make us ill and cause e.g. asthma and allergies. A well designed, mechanical ventilation system with good regulating possibilities will ensure a sufficiently dry and healthy indoor climate. A ventilation system which recycles heat saves both heat and energy. Midtconsult has experience in consultancy and project design of ventilation for both new buildings and refurbishment of existing buildings where hygiene, comfort and an optimum total economy are taken into consideration.