Load-calculation procedure for electric-panel space heating

THE use of radiation as a means of establishing comfort conditions in an occupied space is not a new idea to the electrical engineer. Small incandescent electric heaters have long been used as radiant sources capable of providing spot heating with a minimum time lag and of achieving a locally comfortable environment in a space where the air temperature is lower than 70 degrees Fahrenheit. With respect to both of these characteristics such heating units resemble the open fireplace and are subject to its disadvantages as well as its advantages. On the negative side must be considered the high intensity of the source with consequent difficulty in obtaining a satisfactory uniformity of heating effect.