Contact
is built and run by me, Mathieu Leclerc, from North Vancouver, British Columbia. Messages reach me through HydronicWaterTreatment.com.
Tell me. This is the most useful message I can get, and I would rather hear it than not. Every solver on the site is checked against answers worked by hand, but a wrong unit, a stale reference value or a formula that is right in general and wrong for your case are all live possibilities.
Four things make a report something I can reproduce in a minute rather than an afternoon:
- The page address — copying it from the address bar carries your values with it.
- What you entered, with the units you entered it in.
- What the site answered.
- What you expected instead, and where that came from — a textbook, a table, a spec sheet.
That last one matters most. Half the interesting disagreements turn out to be two different conventions rather than an error, and knowing your source is what tells the two apart.
- A formula that should be here and is not. Tell me the field you work in and what you reach for most, since that is usually the gap.
- A worked example you would have wanted as a student. The example problems come from real ones.
- Anything about how the site works that the Guide failed to explain. If you had to guess at something, that is my fault and worth fixing.
- Privacy questions or requests about your own data — see the privacy page for what the site actually stores, which is less than most people expect.
- Water treatment for a building — that is the day job, and it goes through HYDRONIC rather than here.
What I cannot do
I cannot check your homework, stamp a drawing, or tell you whether a design is safe. The site shows its working precisely so that you can judge a result yourself, and the Guide ends with an honest section on where that judgement still has to be yours. For anything a professional engineer needs to sign, you need the engineer, not the calculator.