Large rooftop package AC units often use ________ sensors to help draw in fresh air to meet code requirements and to cool if temperature and humidity permit

A) Enthalpy B) Low pressure C) Economizer D) Airflow


C

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What changes have occurred in our atmosphere over the past 2000 years?

What will be an ideal response?

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Answer the following statement true (T) or false (F)

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Indicate whether the statement is true or false.

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The approximate calculated volume of grout required per 100 square feet of block wall surface area is 1.85 for a 12" block.

Answer the following statement true (T) or false (F)

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