Why do gas furnace efficiencies jump from 80 percent to 90 percent?
A) The blower used with 85 percent furnaces cannot be used for air conditioning.
B) Federal regulations do not allow the production of mid-efficiency furnaces.
C) By installing a recuperative coil ahead of the main heat exchanger.
D) The physics of combustion make it impossible to produce an 85 percent efficient furnace.
C
You might also like to view...
Examples of ____________________ wounds include contusions, hematomas, seromas, abscesses, or traumatic hernias.
Fill in the blank(s) with the appropriate word(s).
What does this tolerance apply to?
Refer to Drawing Number 4190487 R0 and answer the following questions.
Which of the following is not one of the external buses of an 8085 microprocessor?
A) video bus B) data bus C) address bus D) control bus
The reflected load in a transformer is defined as the actual load as it appears to the source and results from:
A) the voltage ratio. B) the power ratio. C) the turns ratio. D) the current ratio.