AnemoCalc
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NPU airflow testing, simplified

Airflow testing,
without the paperwork.

Calculate Negative Pressure Unit airflow with confidence. Catch anomalous readings, keep an auditable history, and produce professional PDF reports.

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Built for real site work

Catch errors before the report.

AnemoCalc guides each test from the first velocity reading to the signed-off record. Anything outside tolerance is surfaced while it can still be checked on site.

1 Take readings
PointVelocityΔ avg
11.22−1%
21.24+1%
31.21−2%
41.25+2%
Average1.23 m/s
2 Check anomalies
Accepted variance± 10%
Reading 1 In range
Reading 2 In range
Reading 5+16% · Check

Flagged before the report is saved.

3 Save and report
Test saved
Site
Riverside fit-out
Airflow
428 m³/h
Status
Valid
Generate PDF report
AnemoCalc
  1. Summary
  2. Test details
  3. Readings
  4. Results
  5. Sign-off
AnemoCalcReport AC-240524-1042
24 May 2026

Test summary

Project
Riverside Office Fit-out
Location
Level 3 · Zone 2
Test type
NPU commissioning
Calculated airflow428 m³/h
Status Valid

Professional reports,
every time.

Every completed test leaves a clear, consistent record that can be reviewed, downloaded, and shared when needed.

  • Guided on-site testing

    A focused sequence keeps the job moving and reduces missed details.

  • Saved, auditable history

    Tests stay time-stamped and available for traceability.

  • Reports ready to send

    Generate consistent PDFs for clients, teams, and auditors.

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Simple pricing.
Full test history.

One plan for independent teams, with enterprise support when you need to roll AnemoCalc out at scale.

Business£3

per month

  • Complete calculator workflow
  • Saved test history
  • PDF report generation
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100+ seats

Rolling out across a larger team?

Talk to us about company access, onboarding, and support.

Enterprise enquiry

Questions, answered.

Clear details about testing, records, and reports.

View all FAQs
Is AnemoCalc designed to support HSE-related airflow testing?+

AnemoCalc is designed to support structured airflow test recording, calculation, and reporting. It helps users keep clear records for compliance and audit purposes, but it should be used alongside the relevant HSE guidance and professional judgement.

Does AnemoCalc replace official HSE guidance?+

No. AnemoCalc does not replace official HSE guidance. It is a calculation and reporting tool intended to help users record and manage airflow test results more consistently.

Can I download a PDF report after completing a test?+

Yes. After completing a test, users can download a PDF report containing the test details, readings, result status, and relevant site information.

A clearer way to complete every airflow test.

Calculate, check, and record each result in one guided workflow.

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