Assertion: category iv furnace | /r/HasAspect | a vent pipe
Facets:
value: under positive pressure
type: OTHER
value: under flue gases
type: LOCATION
value: under 140ºf.
type: LOCATION
Source sentences:
text: A Category III furnace has a vent pipe that is under positive pressure and the furnace is non-condensing, meaning its flue gases only go through one heat exchanger then exit through the vent at temperatures above 140°F.
text: Category IV furnaces are combustion appliances that have a vent pipe under positive pressure and flue gases under 140ºF.