My experience of replacing a 25 yr old gas boiler with a heat-pump provides 5 x more heat per unit in energy input. Over the past 12 months heat-pump used 2580kWh of elec. for a total of 8755kWh heating and hot water. Assuming our old gas boiler was 75% efficient it have required 13149kWh of gas.

New Article: Why does my heat pump defrost in winter? Seen lots of new heat pumps owners see their first defrost and ask lots of questions. So thought I'd write about it. Hope this one is useful. energy-stats.uk/heat-pump-de...

Smart Tariffs are a game changer for the financial benefits of heat-pumps, household batteries and battery electric vehicles. We've cut our household energy, heating and transport costs to 39% of what they were before we fully electrified our house and car. The primary reason is Smart Tariffs.

Graphics Programming weekly - Issue 417 - November 15th, 2025 www.jendrikillner.com/post/graphic...

Another new article: Vaillant Arotherm Performance Tables & Interactive Widget Raw @vaillantuk.bsky.social datasheets are a pain to read, so I created a little widget to easily show the info. Hopefully people find this one useful. 👍 energy-stats.uk/vaillant-aro...

Government policies has big effect on how quickly humanity will transition away from Fossil fuels, so it's right to try to estimate the impact of different policies, to give politicians a guide to impacts of their decisions. However, economics also plays a big role, also crucial to model...

Follow the trend line from the peak at the end of 2023 to Q2 2024 it looks like we'll have no Hydrogen heavy-duty truck sales in 2026. Suspect there will still be some because of deluded politicians pushing funds into dead end solutions because the don't undersand physics and economics.

If you're using DearIMGui for some code stuff I highly recommend this node editor! Wow, I'm never going back... github.com/thedmd/imgui...

From the trajectory of Poland's electric grid looks Renewables will provide more power than Coal around 2027.

Great to see solar, batteries and wind power all combined in one yacht, really need to expand this out to cargo ships. www.youtube.com/watch?v=RnJx...

Graphics Programming weekly - Issue 416 - November 9th, 2025 www.jendrikillner.com/post/graphic...

Like @rustneversleeps.bsky.social and @mliebreich.bsky.social I find simplified analysis helpful in understanding relationships in a system. Our transition away from fossil fuels is critical task for humanity to undertake, modelling & tracking progress helps us grasp the scale of the challenge.

This is what premiums spike to for a man with cancer who is a taxi driver in AZ (met his son). This is Ambetter, operated by private health insurer Centene. It's why we need to extend the ACA credits & fight for Medicare for All.

Solar prices have dropped from $128/Watt in 1975 to $0.26/Watt in 2024. This astonishing drop can be viewed on a linear scale, but this makes it look like price drops have dropped little in the past 20 years. Logarithmic scale shows the relative price drops have accelerated since 2008!

Vital piece of investigative reporting from Sky. They've uncovered the X algorithm which feeds users extremist right wing material from the moment they join the site. It is a far-right radicalisation engine, by design. news.sky.com/story/the-x-...

I'm impressed at how patient @mliebreich.bsky.social was in this debate. The economic viability of the hydrogen economy relies upon everything else being more expensive so it can compete. Meanwhile renewables, battery storage & direct electrification are already cheaper than Fossil Fuel Systems.

Updates of monthly car sales data in the last few days. robbieandrew.github.io/carsales/

@smmt-ukauto.bsky.social have published their UK October 2025 new car registration figures, with BEV and PHEVs both show strong growth while pure Petrol and Diesel segments shrinking. If BEVs continue to follow this growth trajectory then they'll likely be half of UK new car sales in 2027.

Graphics Programming weekly - Issue 415 - November 2nd, 2025 www.jendrikillner.com/post/graphic...

What makes a heat pump install efficient? 📈 I presented the data-backed insights from @openenergymon.bsky.social heatpumpmonitor.org at a recent CarbonTrust webinar. Watch the recording: youtu.be/C16nBd85XOM?...

Tomorrow is your last chance to vote YES on Prop 50 in California. Remember, nobody gets to sit out on elections anymore. Fascism is here, and the Trump cult wants it to stay. The best way to beat it is to #VOTE. #VoteBlueToSaveDemocracy #VoteOutEveryRepublican

Savage, but highlights a major problem with current AI.

New blog article on the site Vaillant aroTHERM Basic Hot Water Settings energy-stats.uk/vaillant-aro... A look through all the Vaillant heat pump hot water settings, what they do and some recommendations. Hope this is useful. 👍

This graph of life expectancy needs to be named the #DonaldDip. The massive drop in life expectancy during COVID has in the US far outstrips the drop in other nations. This all happened in Donald Trump's first presidency.

Adoption of solar and batteries in households and businesses across the world could well be a getaway into transitioning from fossil fuelled solutions for transport and heating to electrified ones. Once you adopt successfully one of these solutions you'll be more receptive to others.

LunarG's KosmicKrisp driver is now a Khronos Vulkan 1.3 Conformant product for Apple M3 Pro! Say goodbye to portability hacks; hello native Vulkan power for macOS devs, Android emulation, & beyond. www.lunarg.com/lunarg-achie... #Vulkan #AppleSilicon #Mesa #GraphicsDev

Last week visited a client in Belgium and chose to drive & take the Hull-Rotterdam ferry rather fly. It took 24hrs door to door in both directions including Ferry. Driving. Not quick but lower CO2 and more flexible. Total cost of home and public charging was £80.62, which is 9p/mile. Ferry £303!

The number of heat pumps going into new residential buildings in Germany has risen dramatically, but - just like EVs with fleet turnover - this has to propagate to the entire housing stock. At least we can see that gas has now peaked in the German housing stock.

Graphics Programming weekly - Issue 414 - October 26th, 2025 www.jendrikillner.com/post/graphic...

A majority of voters, and a plurality of white voters, think that Reform is a racist party with racist policies.

Wow! "Without the Musk partisan effect, Tesla sales between October 2022 and April 2025 would have been 67-83% higher, equivalent to 1-1.26 million more vehicles. Musk’s partisan activities also increased the sales of other automakers' electric and hybrid vehicles 17-22%" www.nber.org/papers/w34413

Over production due to shrinking consumption of oil will be a big story over the next decade. Oil price will drop, nations with expensive to extract oil will cease production first, until it's just a handful of petrol states left. I expect we'll see the begining of big changes this decade.

How strong is Europe’s policy framework for industrial electrification? Our expert survey: not very. ⚙️ Policy priority electrification: 2.3 / 5 ⚙️ Policy priority heat pumps: 1.7 / 5 ⚙️ Regulatory support: 1.3 / 5 Huge potential — weak readiness. Full paper 👉 www.sciencedirect.com/science/arti...

Here's something that's not talked about enough The air pollution from burning fossil fuels kills an estimated 10 million people a year 1 in 6 deaths is caused by fossil fuels www.sciencedirect.com/science/arti...

#Dependenitis: A software development disease caused by the over-reliance on 3rd party software to achieve simple tasks that only increase software build complexity, reduce build resilience and reduce overall software quality. Cure: train software developers with the skills to write actual code.

Graphics Programming weekly - Issue 413 - October 19th, 2025 www.jendrikillner.com/post/graphic...

@janrosenow.bsky.social point about energy transitions happens sector by sector and place by place it's happening household by household, business by business. Each individual transition is small by itself but together they create massive positive change.

New deep dive article up on the site: "How Much Electricity Does a Heat Pump Use?" "How Big a Battery Do You Need for a Heat Pump?" Hope people find the content and calculators useful. energy-stats.uk/how-much-ele...

Ember demonstrating, in numbers, how electrification is central to reducing energy imports in Europe. Heat pumps in the Netherlands are already reducing gas demand in homes by around 10%! ember-energy.org/latest-insig...

The COVID blip in air passengers is stark. Shows what governments can do when motivated enough to change behavior. Troubling that humanity has just got back to steady growth in flying and already exceeding pre COVID levels.

“In Finland, the number of homeless people has fallen sharply. Those affected receive a small apartment & counselling with no preconditions. 4 out of 5 people affected make their way back into a stable life. And all this is CHEAPER than accepting homelessness.” It costs a lot less to house people.

I've so busy that it's taken me 2 weeks to update my BEV market share spreadsheet. Market share for BEVs grew from 20.5% in September 2024 to 23.3% September 2025, in the same period market share for the biggest segment Petrol dropped from 50.1% to 45.2%.

Just have to hope that Nissan survive to 2040 so we can see how this slide ends. Key takeaway obviously isn't about Nissan, it's about the rapid progress of battery electric vehicles. More performance & more range for less money. That trend is not slowing, we may see those 2040 specs in 2030.

Wow, official tests show PHEVs environmental performance improving, but in the real world they are actually becoming more polluting. www.theguardian.com/environment/...

It's finally here! 100+ scholars, global scope, practical insights. “Climate Obstruction: A Global Assessment” shows how organized interests stall policy—and how governance can respond. Open access available now! Or order for paperback and hardcover. cssn.org/wp-content/u...

🚨 Launched: State of Wildfires Report 2024-25 The Americas felt the harsh reality of what it means to live on a more fire-prone planet, with extreme #wildfire episodes made 2-3 times more likely by #climate change. 🔥 Full details via our brand new website: stateofwildfires.com/latest-report/

ICE arrested comedian Robby Roadsteamer for singing a parody of Rod Stewart’s “Do Ya Think I’m Sexy” in a Jeffrey Epstein the Giraffe costume outside their facility. He sings “If you hate brown people / and you are a Nazi” and ICE thugs grab him and drag him into detention. No violence—just speech.

More on this:

dear imgui 1.92.4 released! github.com/ocornut/imgu... Bonus links: - list of extensions github.com/ocornut/imgu... - debug tools github.com/ocornut/imgu... - error recovery github.com/ocornut/imgu... - getting started github.com/ocornut/imgu... - bindings & backends github.com/ocornut/imgu...