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  #1  
Old 7/6/13, 3:57 PM
Darren Taylor Darren Taylor is offline
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Default Is this right?

I've been studying using the exam tool and came across the question and answer below. I thought efficiency was increased by pulling more heat out out of the combustion process which would DECREASE temperature of flue gas. Am I wrong?


Question: High-efficiency gas furnaces improve heating efficiency by _____

answer: increasing air flow and the temperature of flue-gas exhaust
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  #2  
Old 7/6/13, 4:20 PM
David B. Fairbairn David B. Fairbairn is offline
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Default Re: Is this right?

You are correct. Very strange answer. Multiple choice? Trick question?
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  #3  
Old 7/6/13, 4:22 PM
Darren Taylor Darren Taylor is offline
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Default Re: Is this right?

Here is the whole question

High-efficiency gas furnaces improve heating efficiency by ______________.

increasing blower speed and evaporating flue gases
decreasing air flow and the temperature of flue-gas exhaust
reducing air flow across the heat exchanger
reducing the temperature rise and condensing flue gases
increasing air flow and the temperature of flue-gas exhaust


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  #4  
Old 7/7/13, 9:55 AM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
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Default Re: Is this right?

reducing the temperature rise and condensing flue gases

To me the above is the best answer of the group and it is poorly worded???????



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  #5  
Old 7/7/13, 1:37 PM
KEVIN WOOD, CMI KEVIN WOOD, CMI is offline
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Default Re: Is this right?

Agreed Charley and something I am sure Ben would correct!
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  #6  
Old 7/8/13, 12:15 AM
Darren Taylor Darren Taylor is offline
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Default Re: Is this right?

Thanks guys.

Darren
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