Network — Series Airways Resistance
Series Airways Resistance for ventilation network design and surveying.
Series resistance adds plainly — and identifies the choke: in this default the middle leg is half the total, so that's where money fixes things. Surveying a circuit leg-by-leg then stacking the sum against the fan's capability is the oldest diagnostic in ventilation engineering.
Formula
Note: Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Series Airways Resistance for ventilation network design and surveying. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Network — Series Airways Resistance
Network — Series Airways Resistance computes the governing relationship R_total = ΣRᵢ (series adds directly, like resistors) live as you type. Series resistance adds plainly — and identifies the choke: in this default the middle leg is half the total, so that's where money fixes things. Surveying a circuit leg-by-leg then stacking the sum against the fan's capability is the oldest diagnostic in ventilation engineering. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Network — Series Airways Resistance
- 1Enter your values — Leg 1 resistance, Leg 2 resistance, Leg 3 resistance (sensible defaults are pre-filled).
- 2Read the live results: Total resistance.
- 3Check the "with your numbers" line to see R_total = ΣRᵢ (series adds directly, like resistors) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Network — Series Airways Resistance?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula R_total = ΣRᵢ (series adds directly, like resistors) with authoritative sources cited on the page (McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.)
- ✓Series resistance adds plainly — and identifies the choke: in this default the middle leg is half the total, so that's where money fixes things.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the network — series airways resistance use?+
It evaluates R_total = ΣRᵢ (series adds directly, like resistors), exactly as published. Sources: McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Series resistance adds plainly — and identifies the choke: in this default the middle leg is half the total, so that's where money fixes things. Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
When is this calculator the right tool for the job?+
Series Airways Resistance for ventilation network design and surveying. A free mine ventilation & air quality tool. Surveying a circuit leg-by-leg then stacking the sum against the fan's capability is the oldest diagnostic in ventilation engineering. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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