Kason 1825 Series 4" Wall Narrow Jamb Heated Pressure Relief Port | 120VAC

The 1825 Series 4" Wall Narrow Jamb Heated Pressure Relief Port Seals Tight and Opens at Lowest Pressure of any Competitive Vent. The Lightweight, Springless Valves Provide Greater Air Flow at Low Pressure than Spring-Loaded Valves and the Computer Designed Heater Eliminates Valve Freezing. Lower Pressure Allows Doors to Open and Close with Ease and Reduces Stress on Walk-in Enclosure Joints, Reducing Chances of Leaks