28/02/2026
ISO/TS 23099 and Yachts: Why Most “Efficient” Yachts Still Miss the Point
ISO/TS 23099 is quietly one of the most disruptive developments in yacht design in years — not because it introduces new technology, but because it exposes uncomfortable truths.
For the first time, the industry has a recognised framework that evaluates environmental performance across a realistic operational profile, rather than cherry-picked efficiency claims. It asks a simple but awkward question: where does energy actually go over the life of a yacht?
And the answer is not where most designers are still looking.
At Central Yacht, we recognised this early when developing Orchid 100, our 30-metre, all-alloy, ultra-low-emissions concept. From day one, the project was shaped around lifecycle efficiency, not headline propulsion numbers.
While much of the industry continues to obsess over marginal gains in propulsion efficiency, ISO/TS 23099 reflects operational reality: hotel services dominate lifetime energy consumption. Air conditioning, ventilation, lighting and galley systems quietly burn energy day and night — whether cruising, at anchor, or plugged into expensive shore power.
Designing for lifecycle efficiency means engineering must come first. On Orchid 100, systems architecture drove the design, resulting in a yacht that is more efficient, quieter, more comfortable, and easier to maintain. Simplified systems allow crew to focus on guest experience and safety.
A glaring inefficiency on many yachts is waste heat. Walk through a typical yacht and you’ll find conditioned air expelled overboard 24/7 — energy routinely thrown away.
Orchid 100 addresses this with a centrally located HVAC system using heat exchangers to reduce air-conditioning loads, combined with an absorption chiller recovering waste heat from smaller generators. These are not exotic technologies — just rarely applied coherently at this size.
Central HVAC is often dismissed on sub-50-metre yachts due to “space constraints”. In reality, the constraint is design sequence. Orchid 100 works because the yacht is designed around the system.
The same thinking applies to interiors. Central Yacht has designed and is patenting a new assembly and fastening method reducing panel thickness and weight while improving stiffness and reducing noise. Less weight means lower fuel burn, lower emissions, and lower lifecycle impact — exactly the mindset ISO/TS 23099 is intended to encourage.
Our patented propulsion energy system can deliver greater gains, but physics still matters. Battery density and hydrodynamics currently limit its application to yachts up to around 70–80 feet.
ISO/TS 23099 doesn’t reward marketing claims — it rewards honest engineering, realistic operational thinking, and lifecycle accountability. For some, that’s an opportunity. For others, it will be uncomfortable.
And that’s exactly the point.
/TS23099