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Author Question: Why can oil furnaces operate at efficiencies between 80 and 90 without condensing water in the heat ... (Read 39 times)

@Brianna17

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on: Jul 26, 2018
Why can oil furnaces operate at efficiencies between 80 and 90 without condensing water in the heat exchanger or vent?
 
  What will be an ideal response?

Question 2

Why are most furnaces manufactured today either Category I or Category IV furnaces?
 
  What will be an ideal response?


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nikmaaacs

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Reply #1 on: Jul 26, 2018
Answer to Question 1

The combustion products contain only half as much water as combustion products from a gas furnace. So the dew point of the combustion gasses in an oil furnace is lower than in a gas furnace.

Answer to Question 2

The venting materials for Categories II and III are costly.


@Brianna17

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Reply 2 on: Jul 26, 2018
Thanks for the timely response, appreciate it

hollysheppard095

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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