Search

06 Oct 2022

Households with better energy ratings ‘consumed less gas and electricity’

Households with better energy ratings ‘consumed less gas and electricity’

Households with better energy ratings consumed less gas and electricity per square metre, new figures from the Central Statistics Office (CSO) show.

The CSO figures show that A and B rated dwellings used 42 kilowatt hours (kWh) of electricity per square metre in 2021, compared with 79 kWh per square metre for D and for E, and 67 kWh per square metre for F and G rated dwellings.

The means electricity consumption last year for properties built in 2005-2021 was 48 kWh per square metre, which was around two-thirds of the figure for dwellings built in 2000-2004 of 75 kWh per square metre.

Mean electricity consumption decreased in 2021 compared with 2020 for apartments and mid-terrace houses but it increased for end-of-terrace houses, semi-detached houses and detached houses.

A detached house used 8,039 kWh of electricity in 2021, which was 70% higher than the corresponding mean electricity consumption for a mid-terrace house.

A and B rated detached houses had an average of 230 square metres compared with an average of 89 square metres for detached houses with an F or G rating.

The analysis examined households that had a Building Energy Rating (BER) and used networked gas as their main space heating fuel.

The results showed that households with better energy ratings consumed less gas per square metre, but they were larger in terms of floor area.

Average gas consumption per square metre in 2021 varied from 87 kWh for A and B rated dwellings; 100 kWh for C rated dwellings; 112 kWh for D rated dwellings; 118 kWh for E rated dwellings; and 120 kWh per square metre for F or G rated dwellings.

Average electricity consumption per square metre in 2021 varied from 42 kWh for A and B rated dwellings; 75 kWh for C rated dwellings; 79 kWh for D rated dwellings; 79 kWh for E rated dwellings; and 67 kWh per square metre for F or G rated dwellings.

The figures are well below the average gas consumption per square metre reflecting that electricity is used less than gas as a main space heating fuel.

The mean electricity consumption per square metre in 2021 was lower for newer dwellings.

The mean electricity consumption was lower in 2021 than in 2020 for apartments (-3.1%) and mid-terrace houses (-1.6%), and higher for end-of-terrace (1.6%), semi-detached (2.6%), and detached houses (6.2%).

Average electricity consumption per dwelling varied considerably more by household type than by energy efficiency rating.

The mean electricity consumption by detached houses was 8,039 kWh in 2021. This was 70% higher than the mean electricity consumption by mid-terrace houses of 4,740 kWh.

The data shows that A and B rated dwellings consumed more electricity than F and G rated dwellings.

Meanwhile, the mean gas consumption per square metre in 2021 was lower for more recently-built dwellings.

Households constructed in 2005-2021 used 93 kWh per square metre compared with 112 kWh per square metre for dwellings built in 1900-1966.

The mean gas consumption was lower in 2021 than in 2020 for all household types, however this may have been influenced by fewer people working from home in 2021.

The decrease in average consumption varied from 1.5% for detached houses to 2.7% for semi-detached houses.

However, the 2021 figures were all higher than the average for each dwelling type in 2019.

Average gas consumption per dwelling varied considerably more by household type than by energy efficiency rating.

The mean gas consumption by detached houses was 15,906 kWh in 2021.

This was 84% higher than the mean gas consumption by apartments of 8,664 kWh.

Lower gas consumption due to improved energy ratings was partially offset by a larger floor area for dwellings with A and B ratings.

Detached houses with an A or B rating had an average floor area of 194 square metres compared with 125 square metres for detached houses with an F or G rating.

This trend of larger floor areas for more energy-efficient dwellings was evident for all household types.

Looking at the data, A and B rated dwellings consumed more gas than F and G rated dwellings.

To continue reading this article,
please subscribe and support local journalism!


Subscribing will allow you access to all of our premium content and archived articles.

Subscribe

To continue reading this article for FREE,
please kindly register and/or log in.


Registration is absolutely 100% FREE and will help us personalise your experience on our sites. You can also sign up to our carefully curated newsletter(s) to keep up to date with your latest local news!

Register / Login

Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.

Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.