22 May 2008

AIR TO AIR HEAT PUMPS RESULT FROM A FIELD STUDY IN SWEDEN


The situation on the Swedish market for air to air heat pumps is characterized by
high and increasing energy prices, increasing sales volumes and relatively low initial costs
(purchase and installation). Air to air heat pumps are sold worldwide mainly as air
conditioners. Those heat pumps have maintained a growing interest especially in Sweden
and Norway for retrofitting single family houses without hydronic heating systems. The most
common type sold in Sweden is air to air system of split type with one indoor unit and one
outdoor unit. The main aim for the end-user is to decrease the annual cost for heating the
building. To maintain the public acceptance for the technology and to ensure a continuous
positive development of the market, efficient and reliable systems are of great importance.
Additionally, negative consequences such as noise issues need to be minimized. This paper
describes the first results from an ongoing field study on air to air heat pumps in Sweden.