Choosing the right marine LPG gas boiler for your boat can significantly impact your comfort and convenience while at sea. As we move into 2026, the decision relies on several factors, including the size of your vessel, your hot water requirements, and whether you are a seasonal cruiser or a year-round live-aboard. This guide explores the leading options for marine gas heating.
Instantaneous Marine LPG Water Heaters
Instantaneous water heaters, like those from Morco, are ideal for boats with constant hot water needs. These systems heat water on demand as it flows through the unit, offering instant hot water without the need for a bulky storage tank.
Key Benefits for 2026:
- Space Saving: No storage tank required, making them perfect for smaller yachts and narrowboats.
- On-Demand: You never run out of hot water as long as your gas supply is active.
- Important Note: Modern units typically require 19kg propane cylinders, which may be too large for some standard inland waterway lockers.
LPG Combi Boilers for Boats
Alde combi boilers are a premium dual-function solution, supplying both domestic hot water and central heating through radiators or convectors. For 2026, they remain a top choice for leisure boat owners seeking “home-like” comfort.
Advantages:
- Dual-Zone Heating: Modern systems like the Alde 3030 allow for separate temperature loops (e.g., cooler in the bedroom, warmer in the lounge).
- Quiet Operation: Hydronic heating is silent and provides a more even warmth compared to air heaters.
- Usage Tip: While highly convenient, LPG combi boilers can consume significant gas. They are excellent for leisure use but may be less economical for permanent live-aboards compared to diesel alternatives.
Tanked LPG Water Heaters
Tanked heaters, such as the Propex Malaga 5, are another viable option. These are often more economical to run for occasional users, featuring a low-consumption burner to heat a dedicated storage tank.
- Economical: Uses a small, high-efficiency burner.
- Limitations: Best suited for short showers and washing up, as the tank typically takes 40–50 minutes to reheat once depleted.
Safety and Professional Installation
In the UK, boat gas safety is governed by strict regulations. For private vessels on inland waterways, compliance with the Boat Safety Scheme (BSS) Requirements is often mandatory.
Our team of Gas Safe Registered engineers is specifically qualified for marine environments. We ensure that your system meets the ISO 10239 standards for recreational craft, providing you with a Boat LPG Safety Certificate that satisfies insurers and marinas alike.
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