Do not attempt to convert or use with Propane

The ZoneFirst SPRD-12X12 is a professional-grade barometric static pressure regulating damper engineered to maintain system integrity in multi-zone residential and commercial HVAC applications

Is the 1370905S a normally open or normally closed switch

This 1/2-inch standard service kit allows for field-level restoration of valve performance without requiring full body replacement

making it compatible with standard 24V HVAC transformers and DDC controllers

Johnson Controls A70HA-1 Temperature Control Refrigerant Do not attempt to convertThe Johnson Controls A70HA 1 is a commercial grade, low limit temperature control engineered for critical refrigeration and heating applications. Designed with a vapor pressure sensing element and a 20 foot capillary, this controller provides precise monitoring across a 15F to 55F range. As a manual reset temperature switch, it prevents automatic equipment restarts after a low temperature cutout, ensuring a technician can inspect the system before