A Category IV furnace operates with a: A) High-temperature, ...

[neverstopbelieb]

A Category IV furnace operates with a:
 
  A) High-temperature, positive-pressure vent. B) Low-temperature, positive-pressure vent.
  C) High-temperature, negative-pressure vent. D) Low-temperature, negative-pressure vent.

Question 2

What components are added to make a two-stage furnace?
 
  A) An extra set of burners and an extra gas valve
  B) Electric heat strips and a second stage sequence
  C) A two-stage gas valve, two draft proving switches, and a two-speed induced draft fan
  D) A second heat exchanger and an electric vent gas damper

[rekilledagain]

Answer to Question 1

B

Answer to Question 2

C

[neverstopbelieb]

TYSM

[skipfourms123]

Thanks for the timely response, appreciate it