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Author Question: What size should the combustion air openings be for a room with an 80,000 BTU/hr input furnace and a ... (Read 172 times)

ashley

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on: Jul 24, 2018
What size should the combustion air openings be for a room with an 80,000 BTU/hr input furnace and a 35,000 BTU/hr water heater if the openings are opening directly into a ventilated attic and a ventilated crawlspace?
 
  A) The size is irrelevant so long as there are combustion air vents.
  B) 115,000/1,000 = 115 sq in free area each
  C) 115,000/2,000 = 57.5 sq in free area each
  D) 115,000/4,000 = 28.75 sq in free area each

Question 2

What type of fan is used in most air-cooled condensing units?
 
  A) A draw-through propeller fan
  B) A blow-through centrifugal fan
  C) A draw-through centrifugal fan
  D) No fanmost condensing units are natural draft.


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miss.ashley

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Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

A


ashley

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Reply #2 on: Jul 24, 2018
Thank you!


miss.ashley

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Reply #3 on: Jul 24, 2018
Always glad to help...


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