While the 599 Series MT valves with stainless steel trim can handle low-pressure steam up to 15 psi

it specifically replaces the Honeywell WV8840B5069 found in many A

For contractors performing a Lennox furnace LP conversion

As a direct replacement for 43-101665-09 and 43-26261-09

which includes a siren cut-off timer factory-set to 5 minutes to prevent noise ordinance violations and a manual siren silence switch for maintenance

Resideo ZD8X16TZ Damper L99H008 While the 599 Series MTThe Resideo ZD8X16TZ is a heavy duty, rectangular zone control damper designed for high performance forced air systems. Built with an extruded aluminum frame and parallel blades, this unit ensures low leakage airflow control in critical zoning applications. It features a 24VAC synchronous motor mounted on the 16 inch side, delivering a power closed spring return open fail safe operation. This configuration is ideal for systems requiring a normally