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.
LPG systems ventilation requirements for small craft
Launch CalculatorThe ISO 10239:2025 Annex B calculator determines the minimum required effective area of natural ventilation openings for habitable spaces containing LPG (Liquefied Petroleum Gas) appliances. This tool ensures compliance with international safety standards for marine LPG installations.
Where A = minimum effective area (mm²)
Input appliance ratings and occupancy to automatically calculate minimum ventilation area requirements per Annex B formula.
Calculate ventilation for spaces with unflued appliances, open-flued appliances, and multiple occupants.
Instantly verify if your ventilation design meets the minimum 4,000 mm² requirement and ISO 10239:2025 standards.
Track project information and export calculations for certification and compliance documentation.
This calculator is provided as a design aid for LPG ventilation systems. All LPG installations must be inspected and certified by qualified gas engineers and marine surveyors. Final approval must be obtained from relevant authorities and certification bodies.
ISO 10239:2025 specifies the design, installation, and testing requirements for liquefied petroleum gas (LPG) systems on small craft. Annex B provides specific ventilation requirements for habitable spaces containing LPG appliances.
Design compliant LPG ventilation systems during vessel construction. Ensure all habitable spaces meet ISO 10239 requirements.
Calculate required ventilation areas for LPG installations. Verify compliance before system commissioning and certification.
Verify ventilation compliance during surveys and inspections. Generate documentation for certification purposes.
Integrate proper LPG ventilation requirements into vessel design specifications and general arrangements.
While this calculator helps with design calculations, LPG system installations require professional inspection and certification.
Blue Peter Marine provides comprehensive marine gas system services including: