# Real-World Practice - In Progress Evaluating & Calculating MEP Systems \[Exercise A\] Question 3 of 10Click on the area that represents the Air Handling Unit (AHU)

**URL:** <https://community.blackspectacles.com/t/real-world-practice-in-progress-evaluating-calculating-mep-systems-exercise-a-question-3-of-10click-on-the-area-that-represents-the-air-handling-unit-ahu/7778>\
**Category:** Project Planning & Design\
**Tags:** real-world-practice\
**Created:** [April 1, 2026, 8:46pm UTC](https://community.blackspectacles.com/t/real-world-practice-in-progress-evaluating-calculating-mep-systems-exercise-a-question-3-of-10click-on-the-area-that-represents-the-air-handling-unit-ahu/7778 "2026-04-01T20:46:17Z")\
**Posts on this page:** 2\
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**Author:** ![smith7162](https://blackspectacles.com/uploads/images/20.png) [@smith7162](https://community.blackspectacles.com/u/smith7162)\
**Post date:** [April 1, 2026, 8:46pm UTC](https://community.blackspectacles.com/t/real-world-practice-in-progress-evaluating-calculating-mep-systems-exercise-a-question-3-of-10click-on-the-area-that-represents-the-air-handling-unit-ahu/7778/1 "2026-04-01T20:46:17Z")

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Hello this question is a little confusing. I need help understanding how and why an AHU is being placed in a ceiling.? The ERV handles air, the Condenser looks like it could be a RTU. Am I mistaken that the AHU would need serviced, filters changed, etc. I’ve never seen a AHU installed in the ceiling plenum before?

Thank you,

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**Author:** ![kiaragalicinao](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.blackspectacles.com/kiaragalicinao/32/1607_2.png) [@kiaragalicinao](https://community.blackspectacles.com/u/kiaragalicinao)\
**Post date:** [April 14, 2026, 7:08pm UTC](https://community.blackspectacles.com/t/real-world-practice-in-progress-evaluating-calculating-mep-systems-exercise-a-question-3-of-10click-on-the-area-that-represents-the-air-handling-unit-ahu/7778/2 "2026-04-14T19:08:46Z")

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Welcome to the Black Spectacles Community @smith7162! We are happy to have you here.

I replied to your question on this thread:

> [@PPD | Evaluating & Calculating MEP Systems \[Exercise A\]](https://community.blackspectacles.com/t/ppd-evaluating-calculating-mep-systems-exercise-a/7614/6):
>
> @smith7162 asked this question: In this diagram, the AHU is intended to be a ceiling-mounted, compact unit serving that zone, not a large central AHU in a mechanical room. It still functions as the central hub for air circulation and conditioning - it takes in return air and ventilation air, filters and conditions it, and supplies conditioned air back to the space while coordinating exhaust. In this arrangement, it is a smaller, distributed AHU, which is why it can be placed in the ceiling pl…

Note that we have dedicated community threads for each Real-World Practice exercise. When completing the exercise in your dashboard, you can click on the “Discuss in the Community” button and it will take you to that thread. It’s a great way to engage in discussion with peers who are studying alongside you!

Kiara Galicinao, AIA, NCARB  
Product Coordinator  
**[Black Spectacles](https://www.blackspectacles.com/en-us/)**