Combusting gas should flow through a heat exchanger to the exhaust flue or vent where they are released outdoor. True.
The blower motor of the furnace propels airflow and over heat exchanger, raising the air's temperature. After being warmed, air moves through your home's ducting and into the rooms. Shell - and - tube heat exchangers exchange heat between a group of tubes that are encircled by a sizable shell vessel instead of through two surfaces. The transfer of heat among materials flowing and through pipes and materials running over the tubes within the shell. Given that it is the most effective, the counter - current flow arrangement is the most typical in tube and shell heat exchangers. The biggest temperature difference across fluids can be achieved with this flow pattern.
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