this is the current manufacturer-approved update

Durable Silicon Nitride: The upgraded material offers higher thermal shock resistance compared to standard silicon carbide ignitors

the aluminum construction allows for cleaning with water and mild detergents

it provides real-time hydronic system monitoring

Universal Reznor Fit: Designed as a direct swap for various Reznor unit heater models requiring a 5/8" shaft

Danfoss 003N-6252RA Temp Regulator 320788-702 this is the current manufacturer-approvedThe Danfoss 003N 6252RA is a self acting AVTB RA thermostatic temperature regulator designed specifically for cooling applications where the valve must open on a rise in temperature. This 1 2" NPT brass controller is a critical component for technicians managing district cooling systems, heat exchangers, or industrial fluid processes. Operating within a 77 149F (25 65C) setting range, the 003N 6252RA features a linear flow characteristic with a Kvs of