Trane BOX0581 Collector Box 321894-706 This replacement HVAC expansion valve

This replacement HVAC expansion valve is a critical York HVAC part for contractors maintaining 14 SEER+ systems requiring consistent performance under varying ambient conditions

Complete Assembly: Includes the 24 mm venturi and required gasket for a secure

Smith ULN water heaters

while the continuous air venting capability effectively eliminates CO2 and non-condensable gases

this thermistor-based component ensures the integrated control board receives real-time data to manage the delta T across the heat exchanger

Trane BOX0581 Collector Box 321894-706 This replacement HVAC expansion valveThe Trane BOX0581 is a high performance flue collector box engineered for high efficiency gas furnace systems. As an essential component for secondary heat exchanger management, the BOX0581 collector box is responsible for capturing corrosive condensate and acidic combustion byproducts, directing them safely away from the metal heat exchanger surfaces to prevent premature failure. Built with a specialized, temperature resistant composite material,