Push/Pull Furnace and Methods Related Thereto

A method of operating a furnace, the method comprising:

• (a) pulling air into an air inlet of an inlet nozzle and fuel into a fuel inlet of the inlet nozzle with a first blower to form an fuel/air mixture at a fuel/air ratio;
• (b) pushing the fuel/air mixture into a burner box with the first blower;
• (c) combusting the fuel/air mixture within a burner of the burner box to produce flue products having less than 14 Nano-grams per Joule (ng/J) of nitrogen oxides (NOx);
• and
• (d) pulling the flue products through a heat exchanger assembly with a second blower.

A furnace, comprising:

• a housing including first compartment and a second compartment separated by a vestibule;
• a combustion assembly disposed in the first compartment that comprises:
• a first blower including an inlet nozzle having an air inlet and a fuel inlet;
• and
• a burner that is configured to receive a fuel/air mixture from the first blower;
• and
• a heat exchanger assembly comprising:
• a heat exchanger disposed in the second compartment that is configured to receive flue products from the burner;
• and
• a second blower fluidly coupled to the heat exchanger that is disposed within the first compartment, wherein the second blower is configured to pull the flue products through the heat exchanger;
• wherein the air inlet of the first blower is arranged within the first compartment such that air pulled to the air inlet flows over a motor of the first blower and a motor of the second blower.