What is the difference between this and a standard Natural Gas orifice

System Protection: Prevents heavy frost accumulation that restricts airflow and reduces HVAC system efficiency

When installed correctly

This HVAC replacement part is compatible with a wide range of Re-Verber-Ray series

Engineered for a seamless fit into Warrick conductivity fittings

Cleveland Controls AFS-460-136 Switch 30067439-890 What is the difference betweenThe Cleveland Controls AFS 460 136 is a professional grade air pressure sensing switch designed for critical airflow proving applications in commercial HVAC and energy management systems. This field adjustable unit features a DPDT (Double Pole Double Throw) relay configuration, providing versatile switching logic for 120V to 277VAC circuits. Engineered for precision, it monitors positive, negative, or differential pressure across a range of 0. 40" 0.