What is installed in a condensing type gas furnace to lower flue gas temperature and improve heat transfer?

Prepare for the Master Mechanical License Test with flashcards and multiple-choice questions. Each question includes hints and detailed explanations. Get confident for your exam!

A two-stage heat exchanger is installed in a condensing type gas furnace to effectively lower the flue gas temperature and enhance the heat transfer efficiency. This design allows for a more controlled and gradual heat exchange process by utilizing two separate stages, or sections, within the heat exchanger.

In a condensing furnace, the flue gases pass through the heat exchanger, allowing heat to be extracted and used to warm the incoming air before the gases exit through the vent. The two-stage system enables the furnace to operate at lower temperatures, promoting condensation of water vapor in the exhaust. This condensation releases additional latent heat that can further heat the exchange medium, increasing overall system efficiency and reducing energy costs.

This method is particularly advantageous in optimizing heat recovery and ensuring that less heat is wasted in the flue gases, which is a critical factor in high-efficiency heating systems.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy