http://www.flashcardexchange.com/tag/(gas www.flashcardexchange.com: (gas Flashcards en-us Wed, 15 Feb 2012 05:43:05 PST Wed, 15 Feb 2012 05:43:05 PST support@flashcardexchange.com 720 http://www.flashcardexchange.com/flashcards/view/1175332 Describe some major components of a gas furnace. Understand the characteristics of the two types of fuels used in gas furnaces. Understand combustion air, excess air, diluted air, primary air, and secondary air. 2010-03-04 http://www.flashcardexchange.com/flashcards/view/1175332 http://www.flashcardexchange.com/flashcards/view/750944 Describe some major components of a gas furnace. Understand the characteristics of the two types of fuels used in gas furnaces. Understand combustion air, excess air, diluted air, primary air, and secondary air. 2009-02-13 http://www.flashcardexchange.com/flashcards/view/750944