Which appliance category does not create condensate?

Which appliance category does not create condensate?

• A. Category 2
• B. Category 3
• C. Condensing
• D. Category 1

Answer: (D)

Condensation in venting happens when the combustion gases cool below the dew point, turning water vapor into liquid. Non-condensing appliances keep the exhaust hot enough that the gases stay above the dew point, so no condensate forms in the vent. The other categories describe systems that either recover heat from the exhaust by cooling it (condensing), or operate with venting conditions that can lead to condensation, so they do involve condensate. Therefore, the non-condensing category is the one that does not create condensate.

Condensation in venting happens when the combustion gases cool below the dew point, turning water vapor into liquid. Non-condensing appliances keep the exhaust hot enough that the gases stay above the dew point, so no condensate forms in the vent. The other categories describe systems that either recover heat from the exhaust by cooling it (condensing), or operate with venting conditions that can lead to condensation, so they do involve condensate. Therefore, the non-condensing category is the one that does not create condensate.