What size should the combustion air ducts be for a room with a ...

[jilianpiloj]

What size should the combustion air ducts be for a room with a 60,000 BTU/hr input furnace and a 16,000 BTU/hr water heater if the air is traveling through horizontal ducts?
 
  A) The size is irrelevant so long as there are combustion air vents.
  B) 76,000/1,000 = 76 sq in free area each
  C) 76,000/2,000 = 38 sq in free area each
  D) 76,000/4,000 = 19 sq in free area each

Question 2

When the temperature of the rejected condenser air is much warmer than usual, it can be an indication that:
 
  A) The compressor is dirty. B) The condenser coil is dirty.
  C) The evaporator coil is dirty. D) The filter is dirty.

[akpaschal]

Answer to Question 1

C

Answer to Question 2

B

[jilianpiloj]

Thanks for the timely response, appreciate it

[olderstudent]

Excellent