Abstract: A solar collector generally of the plate type which utilizes a plurality of multi-turn collecting strips is disclosed. The multi-turn collecting strips are helixes of either cylindrical or conical shape and are positioned on the interior surfaces of the collector. These helical collecting strips absorb the sun's rays from the various angles at which the rays strike the collector during the day and concentrate and intensify the heat of the rays with this heat then being transferred to a suitable medium such as air for use in home heating or other applications.