Will A Wood Burner Save You Money?

It's becoming increasingly popular for people to buy a woodburner to supplement or replace a gas or electric heating system because they simply can’t afford to pay their spiralling fuel bills. Changing to wood-fired heating saves many people a lot of money, but it takes time to recoup your initial investment in savings on fuel bills. The savings available vary, but these are the main points to consider when working out how much money you can save.

Purchase Costs
The most obvious cost is buying the woodburner. Wood burning stoves are available to suit all budgets, but the cheapest woodburners are not the most efficient. Spending a little extra to buy a more efficient stove can be worthwhile to gain savings in fuel costs over time. Bargain hunters tend to buy woodburners on the internet in order to get the cheapest prices. It can take a little work to compare deals properly – make sure the price advertised includes VAT and delivery, and see if there are any special deals on chimney liner or free fitting accessories with the stove. To ensure you have full manufacturers warranty cover on the woodburner, check that you are buying from an authorised retailer. You may also need to buy a chimney liner or flue system and accessories such as a stove pipe or register plate. If you are not sure what you need, get expert advice before you buy.

Installation Costs
Installation costs vary enormously depending what work needs to be done. If you need a flue liner for your chimney or to fit a twinwall flue system because you don’t have a conventional chimney, this will increase your installation costs. Sometimes fireplaces need to be altered for a woodburner to be installed, at an extra and sometimes unexpected cost. It is a good idea to have a stove installation survey from a  before you buy a woodburner – this will give you a clear idea of what work is necessary and the associated costs, as well as giving you an opportunity to get expert advice about what woodburner is most suitable for your requirements.
Running Costs
Research prices for firewood or coal both from local and nationwide suppliers, unless you are lucky enough to have a free source of firewood such as a friendly tree surgeon! To get the best prices on firewood or coal you need to buy in quantity – if you don’t already have a suitable storage area factor this into your budget as well. Demand for woodburners is increasing in the UK, but the Forestry Commission is implementing a program to develop the UK wood fuel industry over the coming years to ensure plenty of quality firewood will be available at reasonable prices. Recommended woodburner maintenance includes having your chimney swept at least once a year and an annual service of the stove by a HETAS qualified engineer – it’s a good idea to allocate some of your budget to cover these expenses.

Heating a house with a wood burning boiler stove is an increasingly popular option in the UK

With Scottish Power putting their prices up and with the other big suppliers certain to follow. More and more people are turn ing back the clock, more and more people are returning to burning wood. Firewood is a secure and relatively cheap form of fuel and a wood burning stove provides a cosy focal point to any room. A back boiler wood burner stove gives your family plenty of hot water, as well as running a complete central heating system and by heating your home by burning wood as fuel, you are reducing your CO2 emissions.

A wood boiler stove is an appliance that can burn wood to create hot water. Some take the form of what you would recognise as a traditional wood burner whilst others look and work much more like a gas boiler.

There are various types and permutations of boiler for wood stoves available but they all do the same job - they transfer heat from the burning wood into water, which can then be piped where it is needed and used for heating or domestic hot water. In a traditional wood boiler stove the boiler is usually a simple metal box filled with water and with 2 or 4 tappings to allow you to attach your water pipes to it. These tappings are usually 1" BSP fittings. Usually these boilers replace the fire-bricks inside the firebox of the stove and are known as back boilers because the bulk of the boiler is at the back of the firebox.

Wood boiler stove heat output to water

Wood boiler stoves can come with a variety of rated boiler outputs from around 5,000 BTU to 90,000 BTU. Make sure to check whether the rated output is the maximum or nominal. The nominal output is the output at which the stove would normally be run and is of course lower than the maximum output. You would not drive a car at it's full speed all the time and a wood boiler stove is just the same. Also when sizing the boiler stove for your needs remember that you need to use the nominal heat output.

Central heating and hot water from a wood boiler stove

A boiler stove can be used to power your central heating system and to provide hot water as well. Designing such a heating and hot water system is relatively simple but you will need the help and advice of an experienced heating engineer.

Wood fired central heating

Here the wood boiler stove is connected to the house heating system, commonly radiators, and the heat from the burning wood is pumped around the house. If your house uses underfloor heating then you would connect your boiler stove to a hot water tank and then the underfloor heating would be connected to that.

Heating hot water with a wood burning boiler stove

One of the differences between a boiler stove and a conventional gas/oil boiler is that it takes time for the hot water coming from the stove boiler to get up to temperature. This means that you cannot simply take hot water directly from the stove boiler: you need to connect the boiler stove to a hot water tank. The water in the tank is heated by the stove and stored up for use when needed.

Unvented system

In an unvented system there is no header tank and the water in the pipes is under pressure. Modern heating systems run by gas boilers tend to be unvented (or pressurised). One give-away is that there is often a pressure gauge on the boiler measured in 'Bar'. When the water in a pressurised system expands the pressure in the system increases. Most stoves are not suitable to be directly linked up to a pressurised system because with a stove it is possible to boil the water in the boiler. However a vast majority of stoves supplied by authorised dealers can be linked directly to pressurised systems with the incorporation of an expansion vessel - which expands to cope with pressure increases, a pressure release valve, and a heat dump system with additional safety features.

Defra Approved Stoves

Defra Approved Stoves in a nutshell are stoves that have been tested and passed the criteria for being used in a smoke controlled area.
The Department for Environment Food and Rural Affairs undergo the testing and will approve stoves that are suitable for use in smoke controlled areas.
The Defra Approved logo is becoming more used within the stove industry with some companies even using Defra as a category for stoves. Defra Approval is given when for the burning of wood, although the approval may be given on multi-fuel or solid fuel stoves, the approval is for the burning of wood only in a smoke controlled area, so if you live in a smoke controlled area you can have the stove you have always wanted.
One of the latest stoves to be Defra approved is the Aarrow Ecoburn 5 Wood Burning Stove and can be seen on Stove Megastore in the Defra approved category. Click on the link above for more information on the Ecoburn 5.