# Welcome to the PDD Community! \[ START HERE \]

**URL:** <https://community.blackspectacles.com/t/welcome-to-the-pdd-community-start-here/6752>\
**Category:** Project Development & Documentation\
**Tags:** community-basics, help\
**Created:** [April 9, 2025, 8:07pm UTC](https://community.blackspectacles.com/t/welcome-to-the-pdd-community-start-here/6752 "2025-04-09T20:07:36Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![hamza.waris](https://blackspectacles.com/uploads/images/4.png) [@hamza.waris](https://community.blackspectacles.com/u/hamza.waris)\
**Post date:** [June 15, 2026, 12:23pm UTC](https://community.blackspectacles.com/t/welcome-to-the-pdd-community-start-here/6752/16 "2026-06-15T12:23:31Z")

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Hi, I have a question about Real world practice, PDD. HVAC, Electrical, & Plumbing [Exercise B], Question 4 of 10. The correct option is listed as saying, “central systems are more efficient and require less space than water systems”. I think this is wrong, can someone confirm?

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