How is a concentric vent used in a high-efficiency furnace?

A) It creates two close exit points for the vent pipe and combustion air pipe.
B) It allows the vent pipe to combine with condensate drainage.
C) It directs the combustion air pipe to an outdoor exit.
D) It allows a single outdoor exit point for the vent and combustion air pipe.


D

Trades & Technology

You might also like to view...

Describe the uses of clear silicone dampproof liquids and how they areĀ applied.

What will be an ideal response?

Trades & Technology

The primary function of the planer is to smooth the face of a board

Indicate whether the statement is true or false.

Trades & Technology

The letters A and B are used in the Unified Inch Screw Thread Series. For internal threads, the letter A is used.

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

Trades & Technology

The ____ option of the ispell utility is used to ignore concatenated words.

A. -c B. -C C. -i D. -I

Trades & Technology