Heating your narrowboat

From our Guide to living on a narrowboat

Cartoon penguin in a hat and jumper, holding a hot water bottle, ready for festive activities and standing forward.

Keeping warm, dry and comfortable on board

Staying warm on a narrowboat is essential – especially in winter. Boats lose heat quickly, and without good ventilation and insulation, damp and condensation can creep in.

Common types of heating

System	Pros	Considerations	Monthly cost
Solid fuel stove	A favourite of narrowboaters. Off-grid, deep, lasting, dry heat, can cook on it.	Messy, slow to warm, needs cleaning.	£30 - £50
Diesel heater (Webasto/ Eberspächer)	Fast, thermostatic, can heat water.	Noisy, diesel-hungry, needs servicing.	£40 - £100
Back boiler	Uses stove heat for rads & hot water.	Can overheat, more complex.
Electric (shore power only)	Clean, silent.	Needs marina power, costly.	£60 - £100
Gas heater (e.g. Propex)	Simple, compact.	Consumes gas fast, ventilation needed.	£30 - £70

Using your boat for business?

Don’t just expect to rely on your stove to keep your narrowboat snug in winter. Always combine your heating system with these “low-tech solutions”:

Keep doors and windows draught-proofed with brush seals, insulated (thermal) curtains, foam strips and draught excluders.
Get a dehumidifier – a dry boat feels significantly warmer than a damp one and helps prevent mould and mildew.
Use foil-backed insulation behind radiators or on walls to reflect heat back into the boat.
Heat circulators like Ecofans help distribute warmth from your stove to the far end of the boat.
Don’t overlook the classics: hot water bottles (the long ones are great), thermal socks, and fleece blankets still earn their keep.
Get snug with thick wool socks and blankets.

Two people hold hands as a speech bubble shares how their Chilli Penguin stove warms festive activities and mealtime alike.

Two people holding hands discuss festive activities and chimney cleaning in a speech bubble for safety.

The importance of ventilation

Whilst keeping out cold draughts is a good way of making your boat feel snug, it’s crucial to allow some ventilation on your narrowboat, even in winter. This will prevent condensation, damp, and mould. Trapped moisture from cooking, washing, and breathing can quickly lead to unhealthy air and damage to wood and soft furnishings. Opening vents or windows slightly even in cold weather helps keep your boat dry, fresh, and far more comfortable.

A good rule of thumb for ventilating your narrowboat in winter is to open windows or doors for at least 10 – 15 minutes once or twice a day, especially after cooking or showering. If condensation is a persistent issue, aim for 30 – 60 minutes of ventilation daily, broken into shorter sessions. Passive ventilation (such as roof vents or trickle vents) should also be left open year-round to ensure a constant flow of fresh air without significant heat loss.

A note on safety

Heating systems, especially solid fuel and gas, can be hazardous if poorly maintained.

Checklist:

Check flue for blockages regularly.

Use dry wood or smokeless fuel only.

Don’t leave heaters running unattended.

Get diesel and gas systems serviced yearly.

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