About CO2piping.com
Free calculation tools for the refrigeration, heat pump and HVAC trade.
Support co2piping.com
All tools on co2piping.com are free. If they save you time, you are welcome to support the site with a voluntary contribution. It helps keep the tools free, up to date and available in 20 languages.
Purpose
CO2piping.com brings together calculation tools for technicians, designers and consultants who need to size pipes, check pressure drop and produce documentation. The tools are free and require no login.
The tools
- CO2 (R744) pipe sizing – copper
- CO2 (R744) pipe sizing – steel
- HFC/HFO refrigerant pipe sizing
- HC (A3) refrigerant pipe sizing
- Pipe routing on a floor plan
- Heating, cooling & brine pipe sizing
- Domestic water pipe sizing
- Relief valve & discharge line (EN 13136)
- Capillary tube sizing
- GWP, ODP & CO2e of a refrigerant charge
- Refrigerant retrofit: find alternatives
- Troubleshooting: refrigeration and heat pumps
- Knowledge base: laws and rules
- Electrical calculator
- Project schedule (Gantt)
How the calculations are made
The calculations follow established methods and standards, for example Darcy–Weisbach for pressure drop, EN 378 for safety and design pressure, EN 13136 for safety valves and Regulation (EU) 2024/573 on fluorinated greenhouse gases. Refrigerant property data are generated with CoolProp.
Every tool is tested automatically in a browser before a new version is published, and results are compared with established calculation software where possible. Changes are listed in the changelog.
Who is behind the site
The website is developed and run independently by a refrigeration technician and designer.
Responsibility
Results are for guidance. Always check them against applicable standards, manufacturer data and local regulations. See the terms of use.
Contact
Comments and bug reports are welcome at Co2Calc@proton.me.