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Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls

https://www.pv-magazine.com/2026/09/07/hitachi-launches-co2-heat-pump-water-heaters-with-solar-friendly-tariff-controls/
3•thelastgallon•41m ago

Comments

throw0101d•35m ago
CO2 as a refrigerant isn't new:

* https://en.wikipedia.org/wiki/R-744

Just not as prevalent in the residential HVAC market, and more in the commercial/industrial space (probably because of the higher pressures needed to get into a liquid state).

New Records Reveal Problems with Medicare's AI Prior Authorization Experiment

https://www.eff.org/deeplinks/2026/09/new-records-reveal-problems-medicares-ai-prior-authorizatio...
1•hn_acker•19s ago•0 comments

Trezor breach victims now getting malicious QR codes by postal mail

https://domainsure.com/crypto/trezor-supply-chain-hack-moves-to-postal-mail-attack/
1•StuntPope•22s ago•0 comments

GPT-6 Astra: The System Card, Alignment and What Comes Next

https://thezvi.wordpress.com/2026/09/09/gpt-6-astra-the-system-card-alignment-and-what-comes-next/
1•swolpers•33s ago•0 comments

We Accidentally Built a Synthetic Cell Factory

https://bnext.bio/post/we-accidentally-built-a-synthetic-cell-factory
1•rajivm•54s ago•0 comments

John T. Downey, CIA agent captured by China during the Korean War (2014)

https://slate.com/news-and-politics/2014/11/john-t-downey-cia-agent-captured-by-china-during-the-...
1•speckx•1m ago•0 comments

Elon Musk told ex he needed 'a legion of children before the civil war'

https://www.theguardian.com/film/2026/sep/08/elon-musk-ashley-st-clair-documentary-venice
2•vrganj•2m ago•0 comments

Go code is leaving 90% of the CPU idle

https://samuelberthe.substack.com/p/your-go-code-is-leaving-90-of-the
1•adletbalzhanov•2m ago•0 comments

You Are Not a Model. Don't Price per Token

https://www.a16z.news/p/you-are-not-a-model-dont-price-per
1•gemanor•3m ago•0 comments

Ask HN: Is there any solution to the AI infestation?

1•yathern•3m ago•0 comments

A Heuristic Scoring System for Near-Earth Object Close Approach Visualisation

https://zenodo.org/records/22240223
1•UniverseToday•4m ago•0 comments

Fashware

https://git.sr.ht/~rabbits/fashware
4•ErenayDev•4m ago•0 comments

Go fuck yourself Sam Altman

https://twitter.com/bettercallmedhi/status/2097472336257863722
4•doener•5m ago•1 comments

DeepSeek v4.1 Flash Beta on Vercel

https://vercel.com/ai-gateway/models/deepseek-v4.1-flash-beta
2•JonSchneider•7m ago•0 comments

Show HN: A better ChatGPT for NetSuite questions

https://trycadbury.com
1•dopeboy•7m ago•0 comments

Show HN: TrailerPark, a place just to talk about film trailers

1•ordinarily•9m ago•0 comments

Norwegian gas plant that could safeguard Europe from Trump

https://www.politico.eu/article/the-norwegian-gas-plant-that-could-safeguard-europe-from-trump/
4•leonidasrup•10m ago•1 comments

Show HN: A free, open-source agent orchestrator for knowledge work

https://www.itsverso.xyz/
1•SchezHugo•11m ago•0 comments

Show HN: AuralFret – Chords and scales together on one guitar board

https://auralfret.com/play
1•javixlab•12m ago•0 comments

Automatically detecting AI text in my browser

https://www.seangoedecke.com/deckard/
2•gmays•14m ago•1 comments

Show HN: A FOSS Expense Splitter

3•montenegrohugo•14m ago•2 comments

Word Processors in Basic, Part 2

https://permacomputer.solarpunk.au/?p=237
1•surprisetalk•14m ago•0 comments

Google: Attackers are using prompt injection against coding agents

https://cloud.google.com/blog/topics/threat-intelligence/from-prompting-to-autonomy-the-evolution...
5•fourfire•15m ago•0 comments

I'm not an economist, but here's an argument I've been thinking about

https://twitter.com/slatestarcodex/status/2097599396749992185
5•tosh•16m ago•0 comments

Plotext 6 – Plot data, images and video in the terminal

https://github.com/piccolomo/plotext
1•piccolomo•16m ago•0 comments

Authentication Is Largely Solved. Authorization Isn't

https://www.technometria.com/p/authentication-is-largely-solved
1•mooreds•16m ago•0 comments

Ask HN: How to know when Claude has changed model itself during processing?

1•mfaisalghufran•17m ago•0 comments

Besxar is building an orbital semiconductor factory, one SpaceX rocket at a time

https://techcrunch.com/2026/09/09/besxar-is-strapping-advanced-chip-fabs-onto-spacexs-falcon-9-ro...
1•Brajeshwar•17m ago•0 comments

How to pick the right AI model for each task [video]

https://www.youtube.com/watch?v=FdbcY41N9fs
2•deepmem•18m ago•0 comments

Lloyds Bank Denies Palestine Action Prisoner's Mum Mortgage over 'Adverse Media'

https://novaramedia.com/2026/09/09/lloyds-bank-denies-palestine-action-prisoners-mum-mortgage-ove...
1•slowin•18m ago•0 comments

How Big Should a Terraform Root Module Be?

https://newsletter.masterpoint.io/p/how-big-should-a-terraform-root-module-be
1•mooreds•19m ago•0 comments