Key safety aspects that should be checked during a planned ...

[bobbie]

Key safety aspects that should be checked during a planned maintenance service call for any combustion appliance include (you may select more than one):
 
  A) CO levels in flue gas and around unit.
  B) Combustion air.
  C) The presence of CO2.
  D) Vent system integrity.
  E) Furnace cabinet temperature.

Question 2

What is the primary way a convector heats a room?
 
  A) By radiating heat into the space
  B) By releasing microbursts of steam into the room
  C) Through natural convection along the outer walls
  D) By absorbing the cold in the room

[mcomstock09]

Answer to Question 1

A, B, D

Answer to Question 2

C

[bobbie]

TYSM

[billybob123]

Gracias!