Further Renewable Energy Options

Air Source Heat Pumps

Air source heat pumps (ASHPs) use the same principles as GHPs but draw low grade heat from the surrounding air using a fan to pull the air over a heat exchanger. This energy is then upgraded and the heat released via another heat exchanger. Due to variation in the air temperature in Ireland these systems are less efficient than the ground source heat pumps but the systems can have a lower capital cost. It is also likely that this system would need to be used in conjunction with a conventional system.

Life Expectancy: Unknown
Payback Period: 8-15 years

Biomass - Wood Chip / Wood Pellet

Biomass in the domestic sector nearly always refers to wood fuelled systems, which can burn logs, wood chips or wood pellets from sustainable forests. This can be considered a clean and highly efficient alternative to fossil fuel systems. The two main types of biomass heating devices are radiant heat stoves or boilers.

They can be used to provide space heating or a combination of space heating and hot water. The occupants of a house which uses a biomass system can benefit from lower energy costs, and a secure supply of clean, environmentally friendly fuel, since wood chips and wood pellets are carbon neutral. Wood pellets and chips to fuel the stove are priced similar to oil or gas and can be bought in bulk. These are generally low risk and reliable technologies.

Life Expectancy: 25 years
Payback Period: 12 years for wood pellet boilers at current prices

Wind Power

Windfarming is an eco-friendly alternative to other methods of energy prodoction which result in large scale levels of GHG emissions. Ireland's first windfarm was built in Bellacorick, Co. Mayo in 1992. This wind farm can provide approximately 4,500 households with electricity.

Copyright the Department of the Environment, Heritage and Local Government

Wind Power
Copyright the Department of the Environment, Heritage and Local Government

Wind Power

Copyright the Department of the Environment, Heritage and Local Government

Enlarge image

Wind

The energy in wind is converted to electricity by a wind turbine. Most domestic scale technologies are like miniature versions of the wind farm machines. These small scale wind turbines can be installed near/on your house but need strong foundations. Domestic wind turbines should be located high up, on the side of a building, facing the prevailing wind and away from chimney or flues.

The installation of a wind turbine on your home or on your land usually requires permission from the local authority, so it's important to always check with your local authority about planning issues before you have a system installed. It is also advisable to consult with a building engineer to make sure the property is suitable structurally.

Life Expectancy:

Up to 20 years with occasional maintenance and a mid life overhaul

Payback Period:

c.15 years

Funding for Renewable Energy in the home

Home renewable energy systems are relatively new technologies. While they are more widespread overseas, they are not yet very common in Ireland . The government, through SEAI have devised the ‘Greener Homes’ scheme to provide financial and advisory support for home owners who wish to purchase renewable energy heating systems for new or existing homes.

The scheme provides funding for: