Tjernlund Products DC4 Draft Control 321894-709 What is the difference between

What is the difference between BAB and QB breaker types

It is standard practice to replace the drier whenever the system is opened for service or a major component fails

OEM Compatibility: Exact replacement for legacy McQuay and modern Daikin Applied chillers and air handlers

specifically the 1361-102

Tjernlund Products DC4 Draft Control 321894-709 What is the difference betweenThe Tjernlund DC4 Draft Control is an essential component for technicians managing combustion efficiency in residential and commercial heating systems. This 4 inch single acting draft control is precision engineered to maintain a consistent neutral draft within chimneys and vents, effectively counteracting fluctuations caused by changing barometric pressure, stack temperatures, and wind velocity. Fabricated from heavy duty corrosion resistant steel,