Free Smoke Control & Ventilation Calculation Excel Sheets

Free Smoke Control & Ventilation Calculation: Accurate smoke extraction and ventilation design is essential for occupant safety and regulatory compliance. Our free Excel workbooks enable quick calculation of airflow rates and fan requirements for general ventilation, smoke control, stairwell pressurization, and atria, saving hours of manual work.

Multiple Ventilation Modes

• Mechanical Ventilation: Calculates fresh‑air flow for rooms, corridors, and large halls.
• Smoke Control Ventilation: Determines smoke‑extraction rates per code (NFPA, EN 12101‑6).
• Stairwell Pressurization: Sizes air‑supply fans to maintain positive pressure under fire conditions.
• Atrium Smoke Ventilation: Computes natural or mechanical vent area based on stack effect and fire‑gas buoyancy.

Comprehensive Fan & Motor Sizing

• CFM/LPS Calculation: Auto‑converts between imperial and metric units.
• Motor Power Estimates: Selects appropriate motor horsepower or kilowatt rating.
• Pressure Drop Considerations: Includes duct friction and grille resistance.

Additional Ventilation Tools

• Car Park Ventilation: CO₂‑based or fixed‑rate fresh‑air design.
• Generator Room Ventilation: Heat‑load and make‑up air sizing.
• Electrical Room Ventilation: Temperature rise limits and airflow requirements.

Free Smoke Control & Ventilation Calculation: How to Use

1. Download & Open
   • Click the “Download” link to save the workbook locally.
2. Enter Project Data
   • Fill in room dimensions, temperature differentials, and applicable code parameters.
3. Select Mode
   • Choose general ventilation or smoke control scenarios.
4. Review Results
   • The sheet will display required airflow (CFM/LPS), fan size, and motor power.
5. Export & Share
   • Print or PDF the summary for permits, submittals, or field crews.

Applications & Best Practices

• Early Design Stage: Validate system feasibility and budget estimates.
• Bid & Procurement: Generate material lists and cost summaries for ductwork, fans, and controls.
• Commissioning & Testing: Cross‑check as‑built airflow against design values.
• Regulatory Compliance: Demonstrate adherence to fire‑safety codes during inspections.

• Standardize sheet inputs across projects to reduce errors.
• Always verify local code requirements—some jurisdictions have higher pressurization or extraction rates.
• Coordinate with electrical and structural teams for motor loads and anchorage.