Direct OEM Fit: Specifically calibrated for Slant Fin 7-inch venting applications to minimize field modifications

Does this unit require a specific air connection size

it offers maximum installation flexibility for professional contractors working on high-performance HVACR systems

as well as the LFRK-26A series

it ensures the steady flame required to prove combustion before the main gas valve opens

Johnson Controls A-4000-146 Filter Els PW 17895 Direct OEM Fit: Specifically calibratedJohnson Controls A 4000 146 Filter, Carbon, 20 Scfm, 100% Efficient for Particles as Small as . 025 Microns This item is not qualify for free shipping.