The calculators and testing tools available on this website (www.ceinspector.com) are provided by Blue Peter Marine as convenience tools to assist marine professionals in their preliminary calculations and assessments.
These tools are NOT part of the International Marine Certification Institute (IMCI) assessment system and are NOT endorsed or verified by IMCI.
These tools are provided "as is" without warranty of any kind, either expressed or implied. While every effort has been made to ensure accuracy, Blue Peter Marine makes no guarantees regarding the correctness, completeness, or reliability of the calculations or results generated by these tools.
Users are solely responsible for verifying all calculations and results independently before using them for any certification, compliance, or construction purposes. Blue Peter Marine explicitly declines any and all responsibility for errors, omissions, or inaccuracies in these tools, and shall not be held liable for any damages, losses, or consequences arising from the use or misuse of these calculators.
All certification decisions must be made by qualified professionals using approved methodologies and verification processes. These tools are intended as aids only and do not replace professional engineering judgment, official testing procedures, or formal certification processes.
By closing this disclaimer, you acknowledge that you have read and understood these terms.
Professional ventilation calculation tool for marine vessels
Launch CalculatorThe ISO 11105 Ventilation Calculator is a professional tool designed for calculating ventilation requirements for small craft in accordance with ISO 11105:1997 standards. This free calculator helps yacht builders, marine surveyors, and naval architects determine proper ventilation rates for engine compartments, fuel tank spaces, and accommodation areas.
Calculate required ventilation rates based on engine power rating. Ensures adequate combustion air and cooling for safe engine operation.
Determine ventilation requirements for gasoline fuel tank compartments to prevent explosive vapor accumulation.
Calculate fresh air requirements for habitable spaces including cabins, saloons, and galleys to ensure crew comfort and safety.
Verify that ventilation systems meet ISO 11105 requirements for CE marking and Notified Body approval.
This calculator provides ventilation rate calculations based on ISO 11105 formulas. Actual ventilation system design must consider duct sizing, fan selection, and installation details. Professional verification by qualified marine engineers is required for certification purposes.
ISO 11105:1997 specifies the minimum requirements for ventilation of small craft to reduce the risk of injury, loss of life, and damage caused by fire or explosion resulting from accumulation of explosive vapors in enclosed spaces.
Engine Compartment (Petrol): V = 0.04 × P (m³/min)
Engine Compartment (Diesel): V = 0.02 × P (m³/min)
Fuel Tank Space: V = 30 × A (m³/h)
Where: V = ventilation rate, P = engine power (kW), A = compartment floor area (m²)
Design and verify ventilation systems during vessel construction. Create documentation for CE certification and regulatory compliance.
Calculate ventilation requirements during design phase. Specify appropriate ventilation equipment and duct sizing.
Verify existing ventilation systems meet ISO 11105 standards during surveys and inspections. Generate compliance reports.
Assess ventilation adequacy for engine room modifications or repower projects. Ensure safe operating conditions.
While this calculator provides ventilation rate calculations, complete system design requires professional marine engineering services.
Blue Peter Marine provides comprehensive ventilation design and certification services including: