
Theodore Water Heating Series Dual-Purpose (heating/cooling) Commercial Energy-Saving Hot Air Curtain. Dual-Purpose Heating and Cooling: Supports both natural air and hot air modes for year-round use. Energy-Efficient Hot Water System: Connects to central hot water or boiler, reducing operating costs compared to electric models. Customizable Sizes: Available in multiple sizes to fit various scenarios and door heights. High Heat Transfer Efficiency: Built with full metal body and pure copper heat exchange coil for excellent corrosion resistance. Two-Speed Adjustment: Equipped with optimized cross flow fan for adjustable air velocity. Suitable for 3.5m Doors: Delivers air velocity of 10-13m/s, ideal for installation height of 3.5 meters. CE and CQC Certified: Products have obtained CE and CQC certificates for quality assurance.