you will typically need the 20-001-12 or 20-001-13 variant

updated version of the 312800

Standard Fitment: The 3/8" SAE flare fittings allow for straightforward installation without the need for brazing in the field

though capacity ratings will fluctuate based on the specific thermodynamic properties of the charge

also identified as the Model BFK-084

Reznor 196688 Air Restricter you will typically need theThe Reznor 196688 Air Restricter is a critical combustion air management component engineered specifically for Reznor UDAP and UDAS unit heaters. This primary air restrictor is precision stamped to regulate the volume of air entering the venter motor assembly, ensuring the stoichiometric ratio remains within factory tolerances. Maintaining the correct combustion air flow is essential for preventing premature heat exchanger fatigue and ensuring stable