HVAC ASSEMBLY

摘要

The present teachings provide for an HVAC assembly. A first flue (134) is configured to fluidly couple a first heat exchanger (102) to a mixing flue (138). A second flue (130) is configured to fluidly couple a second heat exchanger (106) to the mixing flue (138). A door (182) can inhibit fluid communication through the second flue (130) when in a first position. The door (130) can inhibit fluid communication through the first flue (134) when in a second position. The door (182) can permit fluid communication through the first and second flues (134, 130) when in a third position. The third flue (142) is configured to fluidly couple the first heat exchanger (102) to a portion (170) of the second flue (130) downstream of the second heat exchanger (106) and upstream of the mixing flue (138) when the door (182) is in the third position.