Plumbing Codes
IPC 2021
Hunter's Curve
Hazen-Williams
NFPA 54 (gas)
HVAC Standards
ASHRAE 62.1-2019
ASHRAE 2021 Fundamentals
SMACNA Duct Design
ACCA Manual J (simplified)
Hydronics
Hydronic pipe sizing
Glycol adjustment
Pump TDH checks
Expansion tanks
What It Covers
Fixture scheduling | Vent and drain sizing | Water pipe checks | Duct sizing | Heat load references | Hydronic system sizing
⚠ Important Disclaimer
This tool is for preliminary design and estimation only. Results must be verified by a licensed plumbing or mechanical engineer before use in construction documents. Always comply with the locally adopted codes and the authority having jurisdiction (AHJ). The authors assume no liability for errors or omissions.
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