Julia Gray investigates the benefits of installing a wind turbine at your property

The advantages of having a wind turbine are that any electricity generated by it is free ( although you obviously have to pay for the turbine and installation) and your home’s CO2 emissions are reduced.

Your turbine should also earn you money through the Government’s Feed- in Tariffs scheme – see www. energysavingtrust.org.uk

This pays you not only for the electricity you generate and use, but also for any you export to the national grid.

There are two types of domestic wind turbine: pole or mast-mounted ones, which are freestanding and typically around 5kW-6kW in power, and building or roof-mounted ones, which are usually around 1kW2kW.

Turbines store the electricity they generate in batteries, so it can be used on days when there’s little or no wind, or are connected to the national grid.

Roof-mounted wind turbines are the cheapest option.

The Energy Saving Trust says a roof- mounted 1kW micro system costs up to around £ 3,000, rising to £ 21,000£30,000 for a 6kW polemounted system.

The location of your home will determine how useful a wind turbine will be. The key things to take into account are the speed and direction of the wind, and if there are any obstructions, such as trees and tall buildings.

Wind turbines aren’t suitable for many homes – to find out about yours, try using the Energy Saving Trust’s Wind Speed Prediction Tool at Tiny. cc/windspeed. This provides an estimated wind speed for your location. You can also use an anemometer (wind gauge) to measure how much wind your home actually gets. Most turbines need a minimum wind speed before they can start generating electricity, so check with the manufacturer before investing in one. The ideal location for a wind turbine is a smooth- topped hill that’s exposed and free from