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Author Question: If combustion air openings pass through horizontal ducts with 4,000 BTU input, how large should the ... (Read 50 times)

panfilo

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on: Jul 24, 2018
If combustion air openings pass through horizontal ducts with 4,000 BTU input, how large should the openings measure?
 
  A) 4 sq in B) 2 sq in C) 3 sq in D) 1 sq in

Question 2

Flex duct is easy to install and quiet but has higher ________ than all other forms of duct material.
 
  A) efficiency ratings B) installation cost
  C) energy loss D) resistance to airflow


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eliasc0401

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

B

Answer to Question 2

D


panfilo

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Reply 2 on: Jul 24, 2018
Gracias!

raenoj

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Reply 3 on: Yesterday
Wow, this really help

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