Spasciani SCBA Air Time Calculator

Select a model, choose a cylinder, enter pressure and RMV to estimate time remaining.

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Auto-filled from cylinder default (editable).
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Spasciani SCBA Air Time Calculator (Firefighter Planning Estimate)

Fireground air time is a decision tool: when to advance, when to slow down, when to exit. This Spasciani SCBA Air Time Calculator estimates remaining time based on cylinder water volume, usable pressure after reserve, and RMV (L/min). Use it for training and pre-plans—not as a replacement for your gauge or SOPs.

How firefighters use this estimate

  • Training: build conservative habits and compare workloads using RMV presets.
  • Pre-plans: estimate time needs for long travel paths and complex structures.
  • Crew briefing: standardize reserve pressure and realistic interior pacing.
  • Safety checks: reinforce early exits and frequent air status updates.

RMV: the honest driver of interior time

RMV (L/min) can increase quickly under stress and heat. Light ~25–35, Moderate ~35–50, Heavy ~50–70+. If unsure, plan with heavy-work RMV for interior operations and validate with training data.

Reserve pressure: a protected margin

Reserve pressure keeps an exit buffer when the plan changes—entanglement, delays, assisting a partner, or disorientation. Use the reserve level set by your department policy.

Why the estimate can be optimistic

Real air time can be shorter due to temperature effects, leaks, seal issues, and high movement rate. Treat the calculator as a planning tool and confirm with training and gauge readings.

FAQ

No. It is a planning estimate. Always follow SOPs and monitor your gauge on scene.

Use a heavy-work RMV (50–70+ L/min) if you do not have measured personal RMV data, especially in high heat or long travel distance.

Reserve pressure protects your exit margin and emergency buffer. It reduces interior work time but increases safety margin.

No. Use department procedures and applicable standards for official reporting.

Notes & safety

This is an estimate based on entered values. Real-world air consumption changes with workload, stress, temperature, mask seal, leaks, and training. Always follow SOPs and monitor your pressure gauge.

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