• QDB heaters feature QMark's unique "swept-back" element fin design that permits them to deliver more heat, yet keep enclosure surface temperatures low.

• Two lines of draft barrier heaters offer utmost planning flexibility. A line of heaters rated 100 watts per linear foot is designed to adequately compensate for heat loss through double-pane and storm window installations. A higher watt density line rated at 188 watts per linear foot is designed to compensate for the worst cold window situation - single pane glass. This 188 watts per foot delivery adequately offsets the heat loss in such areas. It's more heat at lower surface temperatures.

• QDB heaters are architecturally styled and compactly sized to resemble decorative trim or molding. They can be installed as individual units or 2 units can be butted end-to-end and can be mounted as low as 2" above the floor covering, and as high as 12" below the ceiling.

•  For more information see Bulletin.

QMark Draft Barrier Heaters are designed to provide supplementary heat directly under windows where they counteract cold downdrafts, minimize condensation and prevent chilly areas from forming at floor level. They permit year-round use of all building space right up to the outside wall. No need to move desks, chairs, tables and people away from the windows in cold weather. The heaters spread a blanket of warm air precisely at the area of greatest heat loss - the windows. Ideal for commercial and public buildings of all kind; desirable supplementary heating for restaurants, motels and offices. These units are not, however, designed for residential use.