Abstract: A humidifier attachable to a baseboard type radiator of the type comprising a body having an open front portion in which is placed a heating element and a panel placed in front of the heating element such that the panel defines with the body a lower opening and an upper opening. The humidifier comprises a feature which enables securement to the front panel of the baseboard type radiator, a container poriton, and an air entrance aperture located above the container portion in alignment with the upper opening.