Related illustrations

0804

Condensation in high efficiency furnaces

· p. 133

The schematic depicts a high-efficiency condensing gas furnace with a burner, primary and secondary heat exchangers, and a house air blower. Arrows show combustion air entering above the burner and exhaust gases passing

0813

Inspecting high-efficiency furnaces

· p. 135

A cutaway schematic of a high-efficiency condensing gas furnace shows a lower circulating-air blower moving air upward past the heat exchangers into the supply plenum. A burner, serpentine heat exchanger, lower finned ex

0814

Inspecting high-efficiency furnaces

· p. 135

A cutaway schematic of a high-efficiency condensing gas furnace shows a burner, heat exchanger assembly, circulating blower, exhaust vent, and condensate drainage tubing. Arrows trace combustion gases through the heat ex