Infrared Overhead Heater: Heating non-glare dual quartz tubes feature gold anodized aluminum reflectors and end caps. Easy to assemble, operate and maintain. Lightweight heating device for quick and quiet performance that effectively delivers all three fundamentals of heat transfer – convection, conduction, radiation. Durable Electric Heater: Frosted Quartz Tube Heating Element. Impressive service life with 5000-hour life expectancy and agency approved. Includes surface mounting brackets that allow the unit to tilt up to 45-degrees. Steel housing has a textured high-temp brown finish and unit is manufactured in the USA. High Performance Heating Device: Directional unit emitter uses a 60-degree reflective pattern providing a dull orange appearance generating radiant heat from floor to ceiling for people or process heating. BTU rating: 20,478. Provides warmth and comfort using high efficient infrared medium-wave quartz emitter generating clean and safe heat output with no fan or moving parts. Where Used: Long lasting construction with corrosion resistant parts. Ideal for damp or harsh environmental conditions for Industrial, Commercial, & Residential (non-dwelling areas). ETL Listed for USA/Canada for suspended indoor or totally enclosed outdoor spot heating applications to solve hard to heat areas such as workstations, shops, garages, patios, bus shelters, loading docks, restaurants, product heating and freeze protection. Install & Care Instruction: To achieve optimum infrared heating results to heat people or objects, mount each heater 8’ apart at 8’ to 14’ high and tilt housing 15-20 degrees towards the target. Prior to each use, wipe the element device with damp cloth to remove dust.