ABSTRACT
Solar air heating of ventilation air is a simple and cost-effective application where fresh air to a building is heated in a solar air collector. The concept has proven to be very successful. Many commercial products are available including ‘off the shelf systems. Available systems range from small units for dehumidification/heating of holiday cottages to more than 50,000 m2 installed in industrial buildings to provide solar heated fresh air. The payback time, especially for large applications e.g. industry, is very short, often a couple of years. If the installation of the system is carried out as part of the renovation of a wall or a roof the extra cost of a solar heating system compared to a traditional facade or roof will be small.
