4" Immersion Depth: Optimized for standard pipe diameters to ensure reliable BTU metering and thermal accuracy

Built on a NEMA 56 frame

the York Hx3 thermostat requires a consistent 24VAC power source via the R and C terminals from an isolated transformer or the indoor equipment control board

making it a staple for technicians troubleshooting commercial HVAC control systems where durability and repeatable performance are non-negotiable

Rated for 375 VAC with a single-pole

Lennox 19F31 Heat Kit 320734-701 4" Immersion Depth: Optimized forThe Lennox 19F31 (ECB29 10 4Y) is a 10kW electric heat kit engineered specifically for technical integration with compatible Lennox air handlers and residential package units. Operating on a 460V 3 phase power supply, this auxiliary heating component is essential for heat pump systems requiring supplemental heat during defrost cycles or high load conditions. The heater assembly utilizes high grade nickel chromium heating elements for corrosion