Step 4 of 5 · How Your Home Heating System Actually Works
Plenum, main duct, branches, vents
Plenum, main duct, branches, vents — step 4 of 5 in How Your Home Heating System Actually Works. Hot air collects in the supply plenum above the furnace, rides the main trunk, splits into branch ducts, exits floor/ceiling vents.
Free home & diy tip: Plenum, main duct, branches, vents (step 4 of 5 from "How Your Home Heating System Actually Works").
Hot air collects in the supply plenum above the furnace, rides the main trunk, splits into branch ducts, exits floor/ceiling vents. Red path out, blue path back.
Walk your house: which vents blow when heat runs? Closed registers and crushed flexible ducts starve rooms.
You'll need
- Supply vs return identified
- Main vents checked open
- One cold-room hypothesis written
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