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Energy efficient homes in the Western Region: some thoughts on retrofit.

The government target of improving home energy efficiency through the retrofitting of 500,000 buildings by 2030 (see the Climate Action Plan 2019) is ambitious.  It is therefore useful to look at the retrofits in more depth, and consider the target and issues from a rural Western Region perspective.

While new buildings have significant potential to incorporate the reduction or elimination of energy consumption (particularly for space heating and cooling purposes) into their design, a focus on existing buildings is essential.  The longevity of buildings and the building stock (typically 50–100 years) means that for a very long time ahead the majority of the building stock will be from before the current era of low energy regulation[1].  In the last blog on this topic  the baseline information on homes in the Western Region was set out.  In this post some of the issues associated with retrofitting these homes is considered in more detail.

Energy efficiency in Western Region homes

As discussed in detail in my previous post, recent improvement in building standards mean that it is generally assumed that homes built after 2010 will require least upgrading and therefore the focus for retrofitting is likely to be on homes built before 2011.  In the Western Region, the Census of population 2016 shows that there are 280,949 homes built before 2011, that is 93% of all the homes in the Western Region (excluding ‘not stated’).  Currently, only 4% of homes in the region, with a BER, have a rating of B2 and higher (the target energy rating in the Climate Action Plan is BER B2 or cost optimal or carbon equivalent).  If these BER ratings already recorded are translated to the Western Region housing stock, it means that 269,711 homes would need to be retrofitted.  The challenge to improve energy efficiency is, therefore, very significant. It is likely, however,  that the BER ratings we have are not reflective of the general housing stock, as they are mainly comprised of houses which are to be sold and new homes and therefore may show higher BER levels than would be the case if all homes had been rated.  On the other hand, some homes have been improved and while some of them will have a new BER rating (included in figures above), others will be better than recorded.

What is retrofit?

Before considering the targets and how they might be applied in the Western Region it is useful to understand what ‘retrofit’ means in an energy efficiency context.  Retrofits are often referred to as ‘shallow’ or ‘deep’.

The SEAI provides the following information on Deep Retrofit:

The Deep retrofit of a home means carrying out multiple energy upgrades all at once to achieve a BER of A-rating.

  • Firstly, you will need to reduce the level of heat loss so that you keep heat in the home for longer. This involves some or all of the following: wall insulation, roof insulation, floor insulation, window upgrades.
  • The next step is to look at an efficient renewable heating system to support the transition away from fossil fuels. The typical heating system installed on a Deep Retrofit Pilot Project is an air-source heat pump.
  • It also includes mechanical ventilation to maintain good indoor air quality.
  • Other renewable energy technologies such as solar water heating panels and solar photovoltaic panels may be appropriate for your home.

In contrast, shallow retrofit may include cavity wall insulation, window replacement, attic insulation, draught proofing, energy efficient lighting and improved heating controls, and these may be done one at a time and not as part of a complete plan.

The government target to bring 500,000 to a BER B2 equivalent does not specify the kind of retrofit required, but it is likely to be closer to a ‘deep’ retrofit approach (although not to an A rating but to a B2), particularly as a proposal is to be developed to phase out grants for ‘shallow’ energy efficiency measures by 2022 (Action 52, Climate Action Plan, Annex of Actions (718KB).

How much will the homeowner save?

Improving the energy efficiency of the home through retrofit should provide energy savings,  the larger the move up the BER scale the larger the savings.  The SEAI has provided an indication of energy costs for different house types at different BER ratings ((see Figure 1 below).

Figure 1: SEAI Indicative annual CO2 emissions and running costs for different rating bands for space and water heating

Source: https://www.seai.ie/publications/Your-Guide-to-Building-Energy-Rating.pdf This table gives estimated annual fuel cost and CO2 emissions on the basis of typical occupancy and heating the entire dwelling to a comfortable level.  The Tables above are based on fuel and electricity factors from February 2014.

According to this table, an owner of an F rated ‘3 Bed Semi Detached House’ could save €2,400 in energy costs a year, while an F rated ‘Large House’ could save €7,200 annually following retrofit.  It should be noted, however, in relation to potential savings, the energy cost estimates usually refer to heating a whole house to ‘a comfortable level’.  It has been found that people living in less efficient homes may not be heating the house to that level, while those in more efficient, upgraded homes may not be achieving the savings estimated as “inhabitants’ everyday practices and norms of comfort are often changed in parallel to retrofitting of the home”.  In other words they may heat their home more (see reference in footnote 1 for more discussion).  Thus the savings are not likely to be as much as predicted.

How much does a deep retrofit it cost?

It is difficult to find generalised cost estimates for deep retrofitting given the significant variation among house types, size and the upgrades required, but it is usually agreed that it is very expensive.

Information from the SEAI pilot deep retrofitting programme found that for 250 homes that completed deep retrofits under SEAI’s pilot programme the average cost to upgrade a home from an average BER rating of F rating to an average A3 rating was €48,417.

Information from Superhomes (a retrofit service providing a ‘one stop shop’ for energy retrofit projects) again highlights the variation in costs depending on the extent of the retrofit.  It notes that the lowest cost for a SuperHomes retrofit in 2019 was €35,000. A grant of €11, 000 was secured, bringing the net cost down to €24,000. This retrofit included a heatpump, wall & attic insulation, external door replacement, airtightness measures and a demand control ventilation system.

SuperHomes suggests that the typical cost of a full scale deep retrofit to BER A3 standard in 2019 was between €50,000 and €70,000 (before grants). These retrofits would include a heatpump, wall and attic insulation, external doors, airtightness measures and a demand control ventilation system. They may also include a mix of external wall insulation, floor insulation, Solar PV and full window replacement. SuperHomes applied for and secured grant funding of a minimum of 35% of costs on all these retrofits. As a result the net spend was typically between €30, 000 and €45,000.

The government retrofit target is a B2 energy rating, rather than the A3 ratings being achieved above.  Thus the cost should be somewhat less, though it is not clear by how much as I have not been able to find data on costs to achieve a B2 rating.  Overall costs of achieving the target will, of course, depend on the type and size of houses which are being retrofitted.  This is turn will partially depend on the incentives available.

However, it should be noted that the cost of the retrofit is very significant, and when compared to the value of homes in Western Region it is clear that it would be equivalent to a large proportion of the home value.  While in more expensive areas the cost of the upgrade may account for less than 10% of the home’s value, it could be double that in counties like Leitrim and Roscommon where house prices are lower (see Figure 2[2]).

Figure 2: Median House price by county 12 months to August 2019

 

Source: CSO residential Property Price index https://www.cso.ie/en/releasesandpublications/ep/p-rppi/residentialpropertypriceindexaugust2019/additionalindicators/

There is little data available as yet on the impact of the BER rating on the value of a house though it would be expected to become more important as the carbon tax increases. The level of increase in a home’s value following a retrofit will also become clearer over time.

Conclusion

it is not clear what mechanisms will be used to achieve the government retrofitting target, but it is clear that it is ambitious.  The cost of retrofits, the means of paying for such energy efficiency, the incentives which will be provided have not yet been fixed.

There are a huge range of issues to be considered when deciding how we should best reduce our emissions for the built environment.  My interest is in rural dwellings in particular and this post has explored only a few of the issues relating to retrofit.  I hope to continue this exploration over the coming months so that the ways rural dwellers in the Western Region can participate in our move to a low carbon region can be better understood.

 

 

Helen McHenry

[1] Kirsten Gram-Hanssen, 2014, Retrofitting owner-occupied housing: remember the people.  https://www.tandfonline.com/doi/full/10.1080/09613218.2014.911572

 

[2] While the price of homes sold in the last 12 months in each country is not the same as the average value of homes in the county it gives a useful indication of relative values.

Climate Action and Rural Dwellers- What’s happening?

There is no significant body of work (internationally or nationally) on climate change and emissions issues for rural areas and yet there are important differences in energy use patterns and emissions (read more discussion on this here). This post gives a brief overview of some of the issues for rural dwellers addressed in the Climate Action Plan.

The majority (65%) of the Western Region population (and a significant proportion of the national population (37%)) lives in rural areas[1]. The focus of much WDC policy analysis is on the needs of, and opportunities for, rural areas in the Western Region in particular in relation to issues which may not have been considered in detail in policy making. Rural areas are places of employment and make an important contribution to the economy.  Rural development (see for example Action Plan for Rural Development) is a government policy (see for example the National Policy Objective 15 National Planning Framework).

At the same time climate change mitigation is a key government priority, and it is essential that the needs, impacts, options and opportunities for rural dwellers (the term ‘rural dwellers’ is used here as the focus here is on people living in rural areas rather than agriculture) are given consideration and actions developed to focus on particular issues for them.

It is recognised (see here) that increasing carbon taxes particularly affect rural areas while the options for rural dwellers to change their behaviour are limited.   Rural dwellers have different energy needs and often have reduced or more costly choices than their urban equivalents. Rural individuals are thought to have a larger carbon footprint than their urban counterparts (see more discussion here) and need greater access to cleaner energy choices. At the same time the sources of clean energy for all citizens are largely rural based.

It is therefore important that we understand the situation for rural areas including the issues that must be the focus of change, the long term options, the opportunities and challenges and the scale and scope of the actions required to reduce rural dwellers emissions and increase the use of renewable energy in rural areas.

Actions for Rural Dwellers in Climate plan

 There are few actions in the Climate Plan which are specifically focused on rural dwellers although many of the actions are certainly relevant.  I briefly outline the specific actions below and then consider some of the other actions which will have particular implications for rural people.

 

Funds

Both the urban (URDP) and rural (RRDP) regeneration and development funds, announced as part of Project Ireland 2040, are awarded on a competitive bid basis.  These are now to include specific evaluation criteria in relation to potential to reduce greenhouse gas emissions (Action 15).  It is not yet clear what these criteria will be but it should mean that they further enable investments which have a specific mitigation or adaptation focus to be funded, and that projects not directly related to climate action are at least climate friendly.

 

Transport

There is a specific focus on the need to address rural issues under the transport heading (e.g. Action 94 to review public and sustainable transport policy and publish a public consultation on public/sustainable transport policy, including rural transport).  This does recognise that rural needs may be different, while Action 100 addresses the need for a vision for low carbon rural transport and commits to “Develop a new rural transport strategy”

This new rural transport strategy is to include:

  • a comprehensive assessment of rural travel demand, and methodologies for determining same
  • set a target for modal shift and emissions reductions for 2021-2025
  • develop proposals for an integrated public transport network
  • develop a pilot scheme for a city and its regional hinterland to develop a best practice model pilot a car sharing initiative such as a vehicle bank in rural Towns

 

Electricity/Electrification

The changes which may be needed in domestic electricity connections and their capacity with the move to increased electrification is to be considered under Action 174 involves the introduction, as required, of new urban and rural domestic connection design standards and infrastructure sizing and design standards to reflect the demand of domestic scale low-carbon technologies

 

Broader Policy with implications for Climate Actions

Action 179 commits to ‘Undertake public consultation to inform future Rural Development Strategy’.  This is a broad commitment but it is to be hoped that climate action and the move to a low carbon economy will be inherent in the new rural strategy, with both specific actions addressing the climate agenda and broader actions aligned with the move to a low carbon rural economy.

In addition the Western Development Commission (WDC) under Action 160 is undertaking a study of the transition to a low carbon rural Western Region.  This is discussed in more detail below.

 

Other Actions relevant to rural dwellers

There are of course other actions with the potential to be significant for rural dwellers.  For example Action 150, which focuses on supporting the development of Local Authority climate action leadership and capabilities, should bring climate action to a more local level in terms of planning, projects (such as Smart Green Mohill) and providing leadership.  Local Authorities will also be working closely with the Climate Action Regional Offices (CAROs).  Local authorities, especially those with significant rural populations have a potentially very significant role to play in driving Climate Action in rural areas.

A number of other key actions in the Climate Action Plan 2019 not specifically relating rural dwellers are outlined briefly below, to highlight the wide ranging impacts and actions necessary for climate change mitigation with a focus on the Built Environment, Transport and Electricity.

 

The Built Environment (Energy Efficiency and Heat)

The built environment accounts for more than 12% of Irelands GHG emissions, and the energy used in buildings accounts for more than a third of our energy demand[2]. so increasing efficiency in the built environment and changing the way we heat our buildings are both significant climate  actions.

Increasing energy efficiency is covered in detail in the Climate Action Plan with a focus on the energy standards for new build, energy efficiency rating in homes and other buildings, regulation (Action 60 and 61 on oil and gas boilers) and retrofitting to improve energy efficiency  (see for example Actions 43-51).  Meeting the high-level target to complete half a million retrofits is a challenge but it should have important  benefits in rural areas, both in terms of improving energy efficiency and comfort and heat for many rural dwellers, as well as in the potential for up skilling and employment throughout the country.  The issues of financing and cost have yet to be addressed in detail.

The Support Scheme for Renewable Heat (SSRH- Action 69) is largely for commercial and larger users and is likely to be particularly attractive in rural areas which are not connected to the natural gas grid.  It will increase demand for local biomass, which provides important rural economic benefits[3] while increased use of anaerobic digestion will provide on farm opportunities.

The way buildings are heated has  important rural dimensions.  Homes in rural areas are more likely to use oil boilers, or rely on solid fuel (including peat which is a significant source of heat energy in some counties) For homes the focus in the Climate Action Plan is largely on the installation of heat pumps (600,000 heat pumps to be installed of which 400,000 are to be in existing buildings).  Given that heat pumps are not suitable for many existing dwellings so other heating options must also be explored.  The use of other renewable energy sources may be particularly appropriate in rural dwellings with more space for storage and with easier access to wood fuels and other renewable energy.

There is significant future potential for renewable heat in rural areas, but rural dwellers tend to have lower incomes than urban dwellers and already have higher levels of fuel poverty, so despite the potential for change, many lack the financial resources to switch to low carbon or carbon free alternatives.

 

Transport

Transport efficiency is also important, in terms of the energy used (from whatever source) for powering vehicles, in relation to the number of journeys being made, and the loading of vehicles (with people or freight).  Breaking the direct link between journey numbers and economic growth will be essential to successful climate action.  There are opportunities for rural dwellers (and others of course) for more home working and e- working in hubs and other locations.  Likewise there is significant potential for car sharing and the co-ordination of it both locally and countrywide though specific apps (see Bla Bla Car for example, which is particularly popular in France (read more about it here) and through social media (see this example from Clare).

The Climate Action Plan has a number of specific actions in relation to EV charging (see for example Actions 72-75) and to a CNG network (Action 76).  It is crucial that both of these networks are rolled out all over Ireland so that the adoption of EVs and CNG fuelled vehicles is easy in all rural locations, and that the links between more urban areas and rural areas are seamless.  CNG vehicles must be able to deliver and pick up loads in all parts of Ireland; visitors (e.g. tourists, friends and those in business) who are using EVs must be able to travel to all parts of Ireland confident of an available, reliable charging network.

Public transport and cycling also have an role to play in rural areas and the options for promoting these in ways tailored to the needs of rural dwellers should form an important part of the new rural transport strategy to be developed (Action 100).

Electricity

Ensuring that ESB Networks and EirGrid  plan the network and deliver on connecting renewable energy sources to meet the 2030 target of 70% renewable electricity (RES-E) capacity will mean more grid development in rural areas.  This will be essential to meeting climate action targets and enabling significant electrification of heat and transport.  The use of local rural energy sources is important to Irelands move to a low carbon economy, so it will be important that the financial, employment and enterprise benefits of using local rather than imported energy are felt throughout rural areas.  This will be important to increasing local acceptance of this infrastructure.

Ensuring that the Community Framework to accompany the Renewable Electricity Support Scheme (RESS) is established and that there are “measures in place to ensure that the community benefit fund is equitable and there is strong citizen participation in renewable projects” (Action 28) is also essential.

Developing an enabling framework for microgeneration (Action 30) will potentially have benefits for all areas but there are clear opportunities for rural dwellers, although, as with many climate action measures, they are likely to be of most benefit to those who can afford to make the investment.

Transition to a low carbon rural Western Region- what will it mean?

The Actions under the Climate Plan discussed above give a brief flavour of some of the issues and opportunities for rural areas in the transition to a low carbon economy.  The WDC is currently undertaking a short study of the transition of the region to a low carbon economy.  Action 160 in the Under Citizen Engagement, Community Leadership and Just Transition in the Climate Action Plan Action 160 is to “Assess the economic and employment implications of the transition to a low-carbon economy”.  There are eleven pieces of research and studies which are counted as ‘Steps Necessary for Delivery’ under this action, including the one to be carried out by the WDC “Study of transition to a low carbon economy: impacts for the rural western region.”

This will be an initial scoping of the issues affecting rural dwellers in the Western Region.  The focus is on the three aspects of energy use which can have significant climate implications: Heat and energy efficiency in the built environment, Transport and Electricity.  This study examines issues relating to those for rural dwellers and it is hoped that we will, in future, be able to examine these issues as they affect rural enterprises, the changes they will need to make, the opportunities they may embrace and the employment issues associated with these changes.  Further into the future we may examine the issues for agriculture in the region, given the often extensive pattern of farming and the prevalence of part time farming.  Land use change and natural solutions are also important to rural areas and might in future be considered from a Western Region perspective.

In the short term, however, the focus is on the changes which must be made in energy use and the implications of these for rural dwellers.  These will be the subject of my forthcoming blogs with more detail on the targets, actions and the needs of and opportunities for rural areas.

 

Helen McHenry

[1] This is based on the CSO definition of the population outside settlements of 1,500 or more.  Other definitions show a higher proportion living in rural areas.  See this post for a detailed discussion on “What is rural?”.

[2] Thermal/heat energy is the second largest of the three modes of energy. It accounted for 37% of the final energy demand in 2017 https://www.seai.ie/publications/Renewable-Energy-in-Ireland-2019.pdf

[3] See here for discussion.  The benefits are highlighted although the values are dated https://www.wdc.ie/wp-content/uploads/reports_WoodEnergyStratEconomic-Impact.pdf  (PDF 3MB)

Electricity Generation and Demand in the Western Region- A Renewable Story

The Western Region has some of the best resources for on shore wind generation in Europe, and in the future, as technology improves, for offshore renewable energy.  The draft National Energy and Climate Plan (NECP) submitted to the EU and published yesterday (19.12.18) made a number of commitments for 2030 in relation to electricity generation and use, including the following:

  • Renewables in our power system will rise from 30% to at least 55% with a broader range of technologies likely to be deployed, e.g. offshore wind, solar, biomass
  • Coal and peat will be removed from electricity generation which will almost halve the emissions from the electricity sector.
  • Penetration of electric vehicles into our transport fleet will build to around 20%.

These will all have a significant impact on how we will generate and use electricity.  It is therefore useful to understand the current pattern of generation and demand in the Region before considering options for the future.

The Western Development Commission (WDC) has recently conducted[1] a review of electricity transmission infrastructure in the Western Region. It examined current and future needs for transmission infrastructure in the Region, and considered how increased renewable electricity generation, along with new ways of using and managing electricity and new methods of improving the use of existing transmission infrastructure might impact on need for investment.  We have published a summary of its findings in WDCInsights Electricity Transmission for Renewable Generation- What’s needed in the Western Region?

In this post the focus is on current and future renewable generation connections in the Region.  Next year, when we have had the opportunity to review the draft NECP and consider the “all-of-Government” Climate Action Plan to be completed in early 2019, it will be clearer what renewable generation connections will be required further into the future, and from that, what further transmission investment will be important.

 

Electricity Generation in the Western Region

The Western Region already has a significant connected renewable generation; almost half of the generation in the Region is renewable (Figure 1).  There is 1,371MW of conventional generation. This capacity is mainly across Moneypoint coal fired power station in West Co. Clare (863MW), Tynagh gas fired power station in East Co. Galway (404MW) and Tawnaghmore oil fired peaking plant in North Co. Mayo (104MW). In 2017 these power stations generated 4,390 GWh, which was approximately 15% of the national demand in 2017.

Figure 1: Generation in the Western Region

Source: www.esb.ie, www.eirgrid.com and MullanGrid Consulting

There is 165MW of hydro generation in the WDC region. This capacity is mainly at Ardnacrusha hydro station in Co. Clare (86MW) and the Erne stations (65MW) in Co. Donegal.  On shore wind generation makes up the rest of the renewable electricity generation in the Region (the locations are discussed further below).

In the future with the ending of coal fired generation as committed to in the draft National Energy and Climate Plan, the vast majority of renewable electricity generation in the Western Region will come from onshore wind and other developing sources including solar and potentially offshore wind and marine generation.

 

Demand and Generation connections in the Western Region

There is substantially higher capacity of both renewable and conventional generation compared to demand in the region.  Renewable generation currently connected (1,343MW) produces approximately 3,750GWh of renewable electricity. Considering total peak demand of 651MW and assuming the nation-wide demand capacity factor of 65%, the total demand in region is approximately 3,700GWh.  It can be concluded that on an annual basis the Western Region is currently producing enough renewable generation to meet 100% of its own demand.   By 2020 the Region will definitely be a net provider of renewable electricity to the rest of Ireland making a significant contribution to the 2020 RES-E targets.

Figure 2 shows the levels of connected renewable generation in the region (1,343MW) and conventional generation (1,371MW) as discussed above.   Maximum demand (at peak) was estimated by MullanGrid as 651 MW with minimum demand 164MW.

Figure 2: Current Generation and Demand in the Western Region

Source: www.esb.ie, www.eirgrid.com and MullanGrid Consulting

By 2020 there could be approximately 1,760MW of renewable generation connected in the WDC region, 1,595MW of wind generation and 165MW of hydro generation. There is a further 1,000MW of renewable generation in the WDC region that will have contracted or been offered connections by mid-2019 (as shown in Figure 2 above) and there is 173MW of further potential on shore wind connections in the short term (as allocated under the Enduring Connection Policy Phase 1 (ECP-1)). Clearly the potential for renewable generation and the opportunities the Region provides are significant.

 

Generation and Demand at County level

It is interesting to look briefly at the patterns of generation and demand at county level in the Western Region (Figure 3).  Donegal, which has the third largest connected capacity of on shore wind generation in Ireland, is clearly significant force in the Region’s transition to renewable electricity.

It currently has 480 MW of connected renewable generation with significant hydro generation (75MW) and 405MW capacity of wind generation with a further 254MW of contracted generation.  Galway and Clare and the next most important counties for renewable generation, with Ardnacrusha making a significant contribution (86MW) in Clare, while most of Galway’s renewable generation (286MW) from wind.  These counties have high levels of contracted wind generation which will be connected in the short term.   Mayo currently has 83MW of connected wind capacity  but has 406MW of contracted generation to be connected.

Figure 3: Generation and Demand in Western Region counties

Source: www.esb.ie, www.eirgrid.com and MullanGrid Consulting

In all Western Region counties currently connected renewable generation is well above the average county demand[2].  Table 1 below gives the detail of the connected, contracted and ECP-1 capacity in each county in the Western Region alongside the estimated demand in each county (although Sligo and Leitrim are considered together).

Table 1: Connected, Contracted and future renewable generation and Demand in Western Region counties.

Source: www.esb.ie, www.eirgrid.com and MullanGrid Consulting

 

Transmission Capacity

The transmission system has been essential in enabling the Western Region to achieve these relatively high levels of renewable generation.  There has been substantial investment in the transmission network in the Region[3] the majority of which, recently, has been in upgrading the existing electricity transmission network to provide additional capacity.  However, to allow for the continued growth of renewable generation in the Region, further investment in new transmission infrastructure is required.

There is capacity in the current transmission system for more renewable generation in areas of the Western Region including large parts of Co. Roscommon, Co. Clare and Co. Galway.  However there is concern about the pace and scale of development of new transmission circuits elsewhere in the Region.  The areas of particular concern in the medium term are Co. Donegal and North Mayo.  In Donegal, by 2022, it is expected that the connected renewable generation will have exceeded the capacity of the existing transmission system.  While the planned North Connacht project[4] will provide critical infrastructure for currently connected and some of the planned renewable generation in development in North Mayo/West Sligo, it will not provide ffor further renewable generation in the area. In the medium to long term there could also be a need for new transmission circuits to Co. Sligo/Co. Leitrim. Considering the extended timelines (at least 10 years) to deliver new transmission infrastructure it is essential to take a long-term view of the generation needs and potential in these areas.

It is important that there is a three-pronged approach to developing the transmission grid in the Region:

  1. Upgrading existing transmission infrastructure;
  2. New transmission infrastructure;
  3. Implementing smart grid solutions.

Although new transmission infrastructure is the most challenging to deliver it is critical for the development of more renewable generation in the Region.  Other factors that will impact on growth of renewable generation are the planning process and the public acceptance of onshore wind generation. Recent new transmission projects have faced strong local opposition and a lack of local political support.

To achieve long term ambitious climate action increased renewable electricity generation will be essential. Therefore further investment in transmission grid with sufficient capacity for new generation connections is crucial.

 

Helen McHenry

 

[1] The Electricity Transmission Infrastructure Review for the Western Development Commission was conducted by MullanGrid Consulting.

[2] This is a simple average of minimum and maximum demand.

[3] EirGrid and ESB Networks, regulated by the Commission for the Regulation of Utilities (CRU), invest in and develop the electricity grid.

[4] http://www.eirgridgroup.com/the-grid/projects/north-connacht/the-project/