Johnson Controls GRD10A-601 Guard Els PW 17895 this SF series unit features

this SF series unit features a 48 cubic inch filtration area

While designed as a York OEM replacement

The 3J is a standard EPDM insert

Direct-fit OEM replacement part ensures compatibility with existing gas valve orifices and blower assembly mounting points

meaning it will re-close the circuit once the water temperature drops below the fixed or adjustable differential

Johnson Controls GRD10A-601 Guard Els PW 17895 this SF series unit featuresProtect sensitive HVAC controls from tampering and physical impact with the Johnson Controls GRD10A 601 Guard. This heavy duty cast aluminum thermostat guard is designed for high traffic commercial and industrial environments where standard plastic covers fail. The unit features a solid baseplate for secure mounting to flat surfaces or standard electrical boxes, providing a professional grade barrier for thermostats and humidistats. Its durable silver