When considering the options for heating a space you may consider using a heat pump to harness the sun's heat stored in the ground, water or air.
Heat pumps rely on electricity to extract heat and so are low carbon, not renewable, energy technologies – although this electricity could come from a renewable source, such as solar PV or a wind turbine. The key things to consider are:
Is the building well insulated?
Since heat pumps only work efficiently at lower temperatures, the building they are situated in needs to have limited heat loss.
Are all other options environmentally and financially expensive?
Heat pumps use electricity to drive the pump meaning they cost money in electricity to run. Since electricity is currently about three times more expensive than gas and results in about three times the CO2 emissions, it's worth considering the alternatives.
For more help and guidance on heat pumps, see the resources to the right.