For dual fuel (fossil fuel kit) applications

you should specify the H921 model instead

This rough bronze water gauge set features a 1/2" NPT male connection and is designed as a "less glass and rod" configuration

Key Benefits Optimized Power Delivery: Rated for 230 volt 30 amp applications to support high-draw cooling and heating cycles

System Compatibility: Explicitly designed for Vitodens 200 WB2B models (19

Schneider Electric (Viconics) SE7200C5045B Zoning Controller 340155-7024 For dual fuel (fossil fuelThe Schneider Electric (Viconics) SE7200C5045B Zoning Controller is a high performance, low voltage terminal equipment controller engineered specifically for pressure dependent VAV box control, baseboard heat, and radiant panel applications. Built on the SE7000 Series architecture, this unit provides precise environmental management via floating or on off digital control outputs, making it a staple for commercial mechanical contractors upgrading