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The Zonefirst SPRD-9 is a professional-grade 9-inch round barometric static pressure regulating damper engineered for precise HVAC bypass management in multi-zone systems
Temperature Element
Built for durability in demanding industrial mechanical rooms
non-metallic disc-to-metal seat located above the drain to prevent sediment accumulation from fouling the seal
Maintenance Efficiency: The high-visibility LED status indicator provides instant feedback
Lochinvar & A.O. Smith 100110124 Heating Element 318518-761 The Zonefirst SPRD-9 is aThe Lochinvar and A. O. Smith 100110124 480V 18KW Heating Element is a heavy duty, screw in replacement engineered for industrial grade commercial electric water heaters and boilers. Designed for high demand applications, this 4500 watt density element features an Incoloy sheath to resist scale buildup and prolong service life in harsh water conditions. As a direct OEM replacement part, it ensures precise fitment and thermal transfer efficiency for