What term is used for air deliberately introduced near combustion or exhaust devices to compensate for vapor and gases being consumed or expelled?

Study for the NFPA 96/17A Class K Test. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Makeup air is the deliberately introduced air supplied near combustion or exhaust devices to replace the air and vapors being consumed or expelled. When an exhaust hood or burner draws air out of the space, negative pressure can develop, affecting combustion and venting. Providing makeup air near these devices restores the balance, supports proper combustion, prevents backdrafts, and helps maintain safe, stable room pressure. Fresh air is general outdoor air, not specifically tied to replacing air lost to exhaust or used by burners. Infiltration air is air that leaks into a space unintentionally due to pressure differences, not a controlled supply. Replacement air is a broader term, but makeup air is the precise term for the intentional near-appliance air supply that compensates for what’s being consumed or expelled.