A solar heater includes a plurality of suspended vertical components that cover at least a portion of an interior side of a window and have open top and bottom ends. Each suspended vertical component has a heat absorbing body position within the transparent sheath. The heat absorbing body is located a first spaced distance from the inner sheath surface of a first side portion of the sheath and a second spaced distance from the inner sheath surface of a second side portion of the sheath. The open bottom end of the sheath receives cool ambient air that is heated while passing between the heat absorbing body and the inner sheath surface of the first side portion and between the heat absorbing body and the inner sheath surface of the second side portion. The open top end of the sheath exhausts the heated air to an interior space of a building.