Two new models of duct heaters are now available from Greenheck. Model IDHB is configurable for most applications in sizes up to 36 x 36 inches. Model IDHC is customizable with enhanced features and a maximum heating capacity of 475 Kw. Both models feature 50 or 60 Hz design, fan interlock, a power terminal block, a control board, grounding lugs, an automatic limit switch for primary over temperature protection and a manual reset limit switch for secondary over temperature protection. Typical applications include space, primary, secondary, auxiliary and reheating. All heaters are UL/CSA listed and many options are available.