Ho analizzato tutte le classificazioni energetiche degli edifici mai emesse in Irlanda (1,4 milioni di case) e ho analizzato i costi annuali di ciascuna valutazione in termini di riscaldamento.
Utilizzando una casa di 100 m² e un costo del carburante misto di circa 12 centesimi/kWh:
– Casa A2: ~€478/anno
– G casa: ~6.818€/anno
Si tratta di un divario di circa 6.340 € all’anno tra le due estremità. Con un mutuo di 30 anni ammontano a circa 190.000 euro di spese di riscaldamento per la stessa casa, solo con un rating peggiore.
Altre cose che sono saltate fuori:
– solo l’1,5% delle case irlandesi sono di classe A1
– la maggior parte sono C e D
– le case costruite prima del regolamento edilizio del 2008 consumano circa 4 volte più energia per m² rispetto a qualsiasi altra casa costruita dopo
SEAI pubblica i dati dietro un pulsante del modulo ASP NET come file compresso da 250 MB separato da tabulazioni. È difficile lavorare, quindi l’ho appiattito in CSV e parquet puliti. Collegamento gratuito al set di dati nei commenti.
Felice di rispondere a qualsiasi domanda sui dati.
https://i.redd.it/kmkep95tj6yg1.png
di Cool_Law_8915
35 commenti
Free dataset on Kaggle: [https://www.kaggle.com/datasets/fionnhughes/irish-building-energy-ratings](https://www.kaggle.com/datasets/fionnhughes/irish-building-energy-ratings)
CSV and Parquet. Gets refreshed automatically every month from the SEAI source.
How do you spend six grand on heating?
I own a G rated home. It’s unnessisary huge and want to downsize. We do not spend this. We spend about 3000 but only heat the rooms we need. We do not heat bedrooms.
It probably would cost the same if we made it an a2 because we would heat the entire house.
Isn’t 12ckwh extremely cheap these days ? I don’t think my night rate is even that cheap
Okay but BER rating is directly tied to the cost to heat the home, no? So a G vs A home that are exactly the same except for, say, insulation is a good comparison. But you could also have a G vs A home that are exactly as efficient, but the G home is much larger. ~~What I mean is BER rating isn’t normalised by size, as far as I know~~, so that 6K diff per year isn’t just comparing shitty old houses vs new build nicely insulated houses. It’s also comparing nice small new builds vs nice huge new builds. So 6K per year could be the difference between heating your shitty home and getting insulation, but it could also just be the cost of heating your mansion.
Edit: I missed the bit where you controlled for size. How many A-rated vs. G-rated 100m2 houses are there?
How much does it cost to get a BER survey & certificate nowadays? In the uk the average starts around £65 (used to be £50) for an EPC (same thing pretty much).
It doesn’t. A G rated home isn’t heated to the same extent and comfort level of an A rated one. People have budgets for heating and they tailor their use accordingly. That’s why the ESRI found that there isn’t much of a saving with retrofit, most people choose to live more comfortably.
I don’t know if I believe this fully . I don’t know what a G is , if it’s like a really old house then maybe . Also keep in mind some A houses are freaking greenhouses in the summer and we need to spend money to cool them ( at least I do )
Its rubbish in the sense noone in G house would leave heating on all day. Thats the bull about BER and climate…we are needing more energy then ever to heat them but just done more efficiently
I’m curious about your blended fuel cost.
I imagine A rated homes likely have a heat pump, but C-G would have gas. Gas is way cheaper than electricity.
I do chuckle when I see these posts. During a power cut or a storm everyone would be running to the G rated house with a nice stove as the A rated will be freezin!
I do a bit of work with this. The BER has a lot of assumptions built in that are maybe unrealistic to the general population. It’s assuming you heat it 8 hours a day from October to May. It’s also assuming reaching a certain internal temperature.
In my experience, occupants in G rated homes underheated to a large extent. This reduces energy use but does mean they are more likely to be in an underheated home. This might have additional negative consequences. Conversely, those in A rated homes tend to overheat their homes, likely basking in the comfort of having a cheaper effective heat price.
So if it cost you 100k ( which would be cheap) to get a house from G to A2. It would be a 15 year pay back ?
>- homes built before the 2008 building regulations use about 4x more energy per m² than anything built after
Those 2008 regulations, you can thank the Green Party of the government of the day for those. One of the few good things to come out that period
I would say your choice to use a 12c/kWh blended skews the data. Most G rated homes are probably heated with gas and most A and maybe some b rated are heated with electricity.
You could probably get gas for 8-10c/kWh which would bring down the costs from C downwards and there is no way you are getting 12c/kWh for electricity. You would need to double that. So this analysis probably overestimates from C downwards and underestimates from b upwards.
My home is an f and it’s costs a hell of a lot less than that to heat
I think the numbers look very inflated.
Just done rough calculation of gas and electricity for my 50 yr home and it’s about €3300.
Have a read of this recent article also stating the saving appear to be overestimated in general.
https://www.rte.ie/news/2026/0315/1563466-energy-retrofitting-analysis/
Can some explain why my shitty apartment built in 1995 got warmer quicker and kept the heat longer than my B2 rated house does now. Even accounting for size it’s ridiculous the difference.
Rubbish in my case. I live in a G rated house and my bills a year are about €2800, so how I can be paying over €6000 a year more than someone else I do not know, especially as it’s a reasonably big house too.
What a load of shite…. Seriously the country is full or g and similar ratings and none are heating this level and incurring this cost…. Ffs
I surprised you got away with scraping that data. I looked into doing it before and figured they’d rate limit me pretty fast. Did you use a ton of VMs?
edit: Oh, is this just the single-file download that doesn’t have all the detail of the individual reports?
Not really
6K a year 🤣 . Thats some basic maths that doesn’t include jumpers.
bet op has triple glazing and wears shorts in the house
I know plenty of people in poorly rated homes and I know exactly zero people who are spending 500 a month on heating alone.
I lived in a G rated bungalow for almost 20 years as an adult. Winter was cold as Siberia but had a stove/inset in the sitting room. Bought 1000l of kerosene per year, which cost about 1000e if not under a bit. Spent another 500 on kiln dried wood and electric bills about 100e a month. Thats about 2.5k a year.
Heat would go on for about 1-2 hours a day in late autumn, early spring, then 3-4 hours most days in winter. Late spring, early autumn and summer, was never or very rarely on.
Am now in an A1 rated home. Temperature is a constant 20/21, electricity bills are 100-150 per month. So maybe 1000-1500 cheaper but I do miss blazing hot radiators and the sight of a natural fire (and associated heat).
That €6340 is a garbage stat, sorry.
Lived in g rated cottage collected cardboard in local shop and burnt it like crazy bought 2 trailers of wood to keep glow for year and had double electric blanket.
What’s the percentage of homes that are A3 +?
Problem is, people are building multi-thousand square foot a-rated mansions that still cost more to heat than an ancient dormer bungalow from 1987
When I’m at home alone I blip the heating to keep things from going damp below 12 degrees and then just heat the space I’m in.
Between 1500 and 2000 liters of kerosene is what costs to heat up my house, which I believe is f (maybe e, I don’t remember ).
I barely use any blanket other than in the bed while sleeping. The missus always complains that it is very hot in the house.
So not sure where they got those numbers but they are total BS.
I’ve been working a lot with this dataset recently for a postgrad assignment using R and I found that the full 1.3 million row version isn’t really suitable for making reliable inferences. I had to clean it to just over 500k records before I could extract anything meaningful, so I think your conclusion might be a little skewed.
Jesus at this point my house is z rated the misses leaves the fuckin windows opened when the heat is on
Where do you get the figures out of for how much energy is required, and what is the definition of “heating” a house?
Me and my partner both live separately at home with our parents. When she visits me she’s constantly complaining about how cold our house is, even though it feels warm to me. When I’m at her house I struggle to get to sleep because the room is so hot, but to her that’s normal.
I think that those who have better insulated homes are used to a warmer house, whereas those who are used to a poorly insulated home are comfortable with a much lower temperature.
If you have gas or electric heating its worth setting a reminder to read the meters once a week and write it down. You will soon be able to tell what increases the cost. I can now tell just from the weather forecast for the week ahead how much gas we will use in the coming week.
I lived in a D2 rated house for 5 years and it cost us €1800 for heating in the last couple of years we were there. Live in a B2 for the last 2 years and it has cost €1600 to heat this year and €1700 last year. (We will be getting PV next month which will bring the house to at least B1 but I dont expect that to have any effect at all on the heating bills, because not enough sun at the time when you need heating.)
We heated both houses (Older house was 50sqm bigger than the current house. Both use gas and its been the same price last 3 years) to 21c day time with step back to 17c at night from September to April. Flow temperature was set to 62c in both houses. We used electricity in both houses to heat the water on night rate electricity, so the gas didnt heat water in either house. It was always comfortable in all rooms (and we always heat all rooms the same so we dont get mold in any cold rooms). I read the gas meter every Saturday night. The gas is not used for anything except heating.
At least one of us works from home every day and the heating is left on whether we are in the house or not (apart from if we are away for the weekend or on holidays). We just let the thermostat control the temp in the house at all times.
I can tell each week what the heating bill is and I can even predict how much gas we will use for each week now just from the weather forecast. I did look into getting a heat pump both in the old house and the new house and decided against it both times. The cost benefit just wasnt there for us in either house.
The last 2 winters have been generally milder than the few before too. And I fully expect gas to increase in price before next winter, so its good to keep a record of the amount of gas used as well as the cost each week, because the unit price will vary over time in the future.
I often have people trying to tell me that I should get a heat pump and that i will be more comfortable if i do so its worth the investment. The heat and comfort is no different in my house than in the house of someone with a heat pump. They never show me their heating units on their electricity bill, but their electricity bills seem to be more than my electricity combined with my gas. We are very comfortable, never cold and would never allow ourselves to be cold in any room in the house so we keep the temp set and let the thermostat and boiler decide how much heat to keep that temp. I have done the calculations and keep an eye on them. I know what im spending and what heat im happy with in the house. If I could find any evidence that a heat pump would be cheaper over a 10 or 15 year period I would go for one 100%. But the numbers dont add up for me at the moment. The numbers on PV do though so thats what i will be spending money on.
If anybody here had to get a B.E.R recently, they would know its a complete tick the box exercise and similar to an nct sheet isnt worth the paper its printed on.
Completely flawed system