Gas Heat Crossword Puzzle

QUESTIONS LIST: primary : too much of this will cause the gas flame to be noisy and "lift off" the burner rack, up flow : type of furnace with a vertical air flow thru the heat exchanger, orange : the proper color of a gas flame is blue with slight _ tips, spud : the orifice is a precisely sized hole in the _ , natural : in a conventional gas furnace, the hot flue gases are vented by _ convection, latent : type of heat a condensing furnace uses to become a high efficiency, vapor : when refrigerant enter the compressor, it is a low pressure low temperature _ , trap : a _ in the condensate line prevents air from being expelled out of the drain line and insects from invading the system, heat : 3 products of complete combustion are carbon dioxide, water vapor and _ , canvas : the _ type of connector in a duct system that reduces noise and vibration, counter : _ flow is another name for a down flow furnace