Sealed burner box for quiet comfort, upflow/horizontal or dedicated downflow designs, Duralok Plus heat exchanger, one- or two-pipe ready 21.
96% AFUE, Single-stage heating operation, Power Saver constant-torque motor 21.
Sealed burner box for quiet comfort, upflow/horizontal or dedicated downflow designs, Duralok Plus heat exchanger, one- or two-pipe ready 21.
96% AFUE, Single-stage heating operation, Power Saver constant-torque motor 21.