5 · Engineering

Pipe cross-section lab.

Toggle a 2.5 m or 3.0 m diameter. Length stays 4.0 m. Switch work, rest, or Model P1, and look from the side, top, or a cutaway. Airflow dots are a diagram, not a CFD result.

This is an explanatory model. It is not a structural drawing, not a substitute for a licensed engineer, and not evidence of an approval under the National Building Code or IS 15916:2020.

What has to fit

Real rooms, used only as a size reference for a bed, a desk, a fridge, and a washroom.

Tiny-house bench bed with storage underneath. Amenity reference, not an OPod. Photo: Tammy, CC BY 2.0, Wikimedia Commons. File · Licence

Compact home-office desk and chair. Amenity reference, not an OPod. Photo: Mackenzie Kosut, CC BY-SA 2.0, Wikimedia Commons. File · Licence

Mini fridge in a hotel room. Amenity reference, not an OPod. Photo: Kgbo, CC BY-SA 4.0, Wikimedia Commons. File · Licence

Hotel bathroom with basin, toilet, and a shower cubicle. Amenity reference, not an OPod. Photo: Wolfmann, CC BY-SA 4.0, Wikimedia Commons. File · Licence

Read the operating notes on safety and compliance. No unapproved cuts in the pipe.