It requires constant 24V power to hold the damper open and will spring shut the moment power is cut

Broad Compatibility: Validated for use in Lochinvar Knight Combi and A

Utilizing a high-grade

As a veteran-grade differential air pressure switch

Technical Benefits: OEM Precision: Maintains the exact flue gas extraction rates required by the original equipment design

Resideo V8043D1205 Zone Valve 322838-753 It requires constant 24V powerThe Resideo V8043D1205 is a professional grade two way hydronic zone valve designed for precise flow control in closed loop heating systems. Featuring a Normally Open (NO) configuration with a spring return mechanism, this valve ensures system circulation in the event of a power loss, making it a reliable choice for critical heating zones. It operates on 24 Vac and provides a 3. 5 Cv flow capacity, suitable for 1 2" inverted flare connections.