Bard HVAC 8403-089 Thermostat 326058-756 Does this valve require an

Does this valve require an external equalizer line

Visual Diagnostics: The integrated LED digital readout provides clear

Enhanced Visibility: Equipped with a large

Direct OEM Fitment: Eliminates the risks associated with generic springs

For 750mV thermopile systems

Bard HVAC 8403-089 Thermostat 326058-756 Does this valve require anThe Bard 8403 089 Thermostat is a field proven 1H 1C programmable thermostat built on the Honeywell T4 Pro Series platform. This unit serves as the direct replacement for Bard 8403 057 and Honeywell TH3110D1040, providing a seamless upgrade path for legacy single stage residential and light commercial HVAC systems. Designed for technical efficiency, it features a UWP mounting system and a tool less terminal block, significantly reducing installation