These low-temperature air duct heaters are designed for use in heating ducts and dryers up to 100°F. They feature finned tubular heater construction and sheet metal terminal housing with predrilled flange mounting. They help to reduce watt density and ensure a consistent flow of air within the duct. They are also ideal for outdoor use and harsh environments. The stainless steel fins can withstand outside elements making them suitable for commercial and industrial applications.