Series CM Fan Convectors consist of a free standing sheet metal casing fitted with extruded aluminium alloy, pencil proof re-circulation, discharge grilles and lockable access panel. The casing contains a fan/motor platform, auto transformer, air filter and hot water heating coil. Series CM fan convectors are 600mm high x 230mm wide. Nominal lengths are 700mm, 900mm, 1200mm and 1500mm.
Heaters are supplied for single or dual fan speed operation. Single speed heaters are set to low, medium or high speed. Dual speed heaters are set to low/medium, low/high or medium/high speeds. Fan control is by means of switches and/or air thermostats.
Series CM fans convectors are suitable for most applications, where low-level free standing heaters with front discharge and re-circulation grilles are desirable. Having an overall height of only 600mm, series CM fan convectors are particularly suitable for under sill or under worktop application, but care should be taken to ensure heaters are sited so that there are no obstructions directly in front, as they could affect air circulation. This is particularly important when using reversed air flow model RA. Typical applications include: Schools, Colleges, Elderly Peoples' Homes, Libraries and Offices.
It is recommended that heaters are selected to operate at medium speed for general use or at low speed for rooms where noise levels are particularly important. Heaters should only be selected at high speed, for non critical application, such as entrance foyers, corridors etc. Or for initial rapid warm up. Sound power levels are available on request.
From the known heat loss of the room to be heated and the operating conditions, select the model and figure number. For large rooms, it is usually better to select two small heaters, rather than one large, to give a better heat distribution and spot noise levels. When ever possible, heaters should be located near windows or in areas of disproportionately high heat loss.
By design, Dunham-Bush fan convectors have moderate leaving air temperatures, low outlet velocities and low air throws. Comfortable conditions throughout the heated space are achieved by good air circulation. It is recommended that whatever possible, the total volume of the room should be circulated through the sum of the heaters four or five times per hour.