While the standard C-415-S offers excellent contaminant control

This heavy-duty copper lead measures 36 inches in length

Manual Reset Security: The M/R functionality requires a technician to inspect the system before restarting

The Zonefirst AOBD-12X8 Damper is a professional-grade automatic opposed blade damper engineered for precise airflow management in residential and commercial zoning applications

With a 15 PSI max inlet pressure rating

Robertshaw 700-057 Gas Valve THPU32HP7Y While the standard C-415-S offersThe Robertshaw 700 057 Gas Valve is a high capacity, 1 inch NPT universal gas valve designed for heavy duty residential and commercial applications, including boilers, central heating units, and large scale furnaces. This 24VAC intermittent pilot gas valve is a versatile 700 Series Uni Kit, providing technicians with a multi functional control solution that replaces over 70 competitors' models. It features a factory preset 4" WC natural gas pressure