The 2021 IPC sets minimum requirements for HVAC equipment and approves new and innovative products, materials, and systems. In October 2019, the Code Council published an independent study comparing model plumbing codes, revealing that over 12 years, districts using IPC saved $38 billion in construction costs, emitted 1,000,000 tons less carbon dioxide, added 166,000 jobs, and saved 880 million feet of pipe. On average, a single-family home can save up to $4,000 in labor, material, and overhead costs compared to homes built to other codes. International Plumbing Code ISBN 978-1609839628.
Key changes in the 2021 IPC include:
- Multi-user toilets, suitable for all genders, are now allowed.
- Two new methods for relining/rehabilitating existing sewers have been added.
- Spaces for roof-mounted solar panels were added above the vent plugs.
- CSA B805/ICC 805 rainwater harvesting systems are permitted as an alternative design method.
- HVAC regulations from the ICC A117.1-2017 standard for usable and accessible buildings and spaces have been incorporated.
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