Plenum
A plenum is a chamber or space in an HVAC system that distributes heated or cooled air throughout a building. It is typically connected to the supply outlet and feeds ductwork that carries air to individual rooms. Keeping the plenum and ducts clean and sealed helps maintain efficient airflow and indoor comfort.
💡 Key Takeaways
- ✓A plenum is a chamber or space in an HVAC system that distributes heated or cooled air throughout a building. It is typically connected to the supply outlet and feeds ductwork that carries air to individual rooms. Keeping the plenum and ducts clean and sealed helps maintain efficient airflow and indoor comfort.
- ✓Plenum obstructions reduce airflow and system performance.
- ✓Regular cleaning supports air quality and efficiency.
- ✓Plenum modifications should be handled by HVAC professionals.
Plenum
/ˈpliːnəm/
Definition
A plenum is a chamber or space in an HVAC system that distributes heated or cooled air throughout a building. It is typically connected to the supply outlet and feeds ductwork that carries air to individual rooms. Keeping the plenum and ducts clean and sealed helps maintain efficient airflow and indoor comfort.
What does a plenum do in HVAC?
It collects and distributes conditioned air into ductwork for delivery to rooms.
Source: The Cooling Company
Quick Facts
How Plenum Works
Conditioned air enters the plenum before flowing into ducts.
Real-World Application
In office buildings, conditioned air flows into a plenum and then through ducts to reach each room.
Pro Tip
Check the plenum for leaks or damage, as air loss can reduce system efficiency.
“Check the plenum for leaks or damage, as air loss can reduce system efficiency.”
Important Things to Keep in Mind
- Plenum obstructions reduce airflow and system performance.
- Regular cleaning supports air quality and efficiency.
- Plenum modifications should be handled by HVAC professionals.
Did You Know?
The term plenum comes from Latin for "full," describing a space full of air.
FAQ
Where is the plenum located?
It is typically attached to the HVAC supply outlet and connects to duct branches.
Can a leaky plenum raise energy bills?
Yes. Leaks reduce delivered airflow and force the system to run longer.
Should I clean the plenum?
Yes. Cleaning supports airflow and indoor air quality.
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