Best Log Burners — Water Heating (2026)
1 log burners matching best for “Water Heating”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Log Burner UK (2026) guide.
#1 Pick
Prity S3W17 Wood Burning Stove with Back Boiler, 17+5kW- Water Heating
£801.53
Pros
- Back boiler can feed central heating radiators and hot water
- High 17kW+5kW combined output suits larger open-plan homes
- Cast iron construction built for continuous daily use
Cons
- Needs a qualified installer to connect to the wet heating system
- Significant investment versus a room-only stove
Water heating log burners offer a traditional and increasingly popular method for providing hot water in rural homes or those seeking a sustainable heating solution. These burners are designed to efficiently burn wood, transferring that heat directly into your water storage tank via a heat exchanger. This provides a consistent supply of hot water ideal for domestic use – showering, washing dishes, and general household needs. They represent a compelling alternative to electric immersion heaters, particularly where fuel costs are favourable and the aesthetic appeal of a wood-burning stove is desired.
FAQ
What size log burner should I buy for water heating?
The required BTU output depends heavily on your hot water demand and tank size. Generally, aim for 10kW or higher for larger tanks and multiple users; a smaller tank might suffice with 6-8kW.
What type of wood is best to use in a water heating log burner?
Slow-burning hardwoods like beech, ash, birch, and oak are ideal. Avoid softwoods as they produce more smoke and creosote, reducing efficiency and potentially damaging the heat exchanger.
How often do I need to refill the firebox?
This varies with wood type and burn rate, but expect to reload with approximately 10-20kg of logs per day for a typical household's hot water needs. Maintaining a consistent fuel supply is crucial.
What safety precautions should I take when installing a water heating log burner?
Installation must comply with current building regulations and chimney codes. Ensure adequate ventilation and consider smoke detectors, as wood-burning stoves produce carbon monoxide – always check manufacturer guidelines.
How does the heat exchanger work in these burners?
The heat exchanger is a critical component, efficiently transferring heat from the burning logs to the water tank. It typically consists of a series of plates or channels that maximise surface area contact for optimal heat transfer – regular cleaning is important.
Are there any specific chimney requirements?
A dedicated, swept chimney is essential for safe operation. The flue should be sized appropriately for the burner’s output and constructed from stainless steel to withstand high temperatures and creosote buildup.
How does a water heating log burner compare to an immersion heater?
Log burners offer a more sustainable option with renewable fuel, while immersion heaters rely on electricity. Log burners can be more expensive upfront but potentially cheaper in the long run depending on wood prices.
What maintenance is required for these log burners?
Regular chimney sweeping (at least annually) and cleaning of the heat exchanger are vital for performance and safety. Inspect the burner regularly for signs of wear or damage.
Can I use treated wood in a water heating log burner?
Generally, no. Treated woods contain chemicals that can contaminate your hot water and corrode the burner’s components; untreated hardwoods are always recommended.
What is the typical lifespan of a water heating log burner?
With proper maintenance, a well-built water heating log burner can last 15-20 years. The heat exchanger requires periodic cleaning and potential replacement after extended use.