Trane International Inc.

Caleb Ryan Joiner

Roger Joseph Voorhis

James Philip Crolius

John Qianghua Zhou

William G Hansen

Benjamin Hayes

Stephen Kowalski

Timothy J Tupa

William James Teising

Gary L Wright

Justen William Grubb

Example furnaces and methods related thereto include a burner box including at least one burner configured to combust a fuel/air mixture. In addition, the furnace includes a first blower including an inlet nozzle having an air inlet and fuel inlet. The inlet nozzle is configured such that operation of the first blower is to pull air and fuel into the inlet nozzle to produce the fuel/air mixture at a fuel/air ratio that is configured to produce flue products having less than 14 Nano-grams per Joule of nitrogen oxides when combusted. Operation of the first blower is configured to push the fuel/air mixture into the burner box. Further, the furnace includes a heat exchanger assembly fluidly coupled to the burner box through a vestibule, and a second blower configured to pull the flue products through the heat exchanger assembly.

Push/pull furnace and methods related thereto

A system and method for controlling a system that includes fixed speed and variable speed compressors are described. The method generally allows the system, for example, a heating, ventilating, and air condition (HVAC) system that includes fixed speed and variable speed compressors, to maximize unit modulating capability. The method allows the use of a variable speed compressor that is relatively smaller, which can lead to cost savings, easier installation, manufacturing, etc.

System and method for controlling a system that includes fixed speed and variable speed compressors

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Clarksville, TN, United States of America

Caleb Ryan Joiner