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Mexico to US Livestock Trade halted due to Screwworm spread

https://www.usda.gov/about-usda/news/press-releases/2025/07/09/secretary-rollins-takes-decisive-action-and-shuts-down-us-southern-border-ports-livestock-trade-due
185•burnt-resistor•3h ago•140 comments

Show HN: The current sky at your approximate location, as a CSS gradient

https://sky.dlazaro.ca
251•dlazaro•4h ago•52 comments

Long-term exposure to outdoor air pollution linked to increased risk of dementia

https://www.cam.ac.uk/research/news/long-term-exposure-to-outdoor-air-pollution-linked-to-increased-risk-of-dementia
113•hhs•4h ago•31 comments

OpenFreeMap survived 100k requests per second

https://blog.hyperknot.com/p/openfreemap-survived-100000-requests
191•hyperknot•4h ago•53 comments

Simon Willison's Lethal Trifecta Talk at the Bay Area AI Security Meetup

https://simonwillison.net/2025/Aug/9/bay-area-ai/
69•vismit2000•2h ago•17 comments

Empire of the Absurd: A Brief History of the Absurdities of the Soviet Union

https://laurivahtre.ee/empire-of-the-absurd/
35•Maro•1h ago•20 comments

Quickshell – building blocks for your desktop

https://quickshell.org/
138•abhinavk•4d ago•23 comments

ChatGPT Agent – EU Launch

https://help.openai.com/en/articles/11752874-chatgpt-agent
30•Topfi•2h ago•7 comments

A CT scanner reveals surprises inside the 386 processor's ceramic package

https://www.righto.com/2025/08/intel-386-package-ct-scan.html
14•robin_reala•28m ago•2 comments

Don Knuth on ChatGPT(07 April 2023)

https://cs.stanford.edu/~knuth/chatGPT20.txt
6•b-man•31m ago•1 comments

Accessibility and the Agentic Web

https://tetralogical.com/blog/2025/08/08/accessibility-and-the-agentic-web/
6•edent•1h ago•3 comments

ESP32 Bus Pirate 0.5 – A Hardware Hacking Tool That Speaks Every Protocol

https://github.com/geo-tp/ESP32-Bus-Pirate
28•geo-tp•2h ago•2 comments

MCP's Disregard for 40 Years of RPC Best Practices

https://julsimon.medium.com/why-mcps-disregard-for-40-years-of-rpc-best-practices-will-burn-enterprises-8ef85ce5bc9b
32•yodon•3h ago•7 comments

Cordoomceps – replacing an Amiga's brain with Doom

https://mjg59.dreamwidth.org/73001.html
19•naves•3d ago•2 comments

Jan – Ollama alternative with local UI

https://github.com/menloresearch/jan
110•maxloh•7h ago•58 comments

Testing Bitchat at the music festival

https://primal.net/saunter/testing-bitchat-at-the-music-festival
11•alexcos•3d ago•5 comments

The dead need right to delete their data so they can't be AI-ified, lawyer says

https://www.theregister.com/2025/08/09/dead_need_ai_data_delete_right/
104•rntn•4h ago•69 comments

End-User Programmable AI

https://queue.acm.org/detail.cfm?id=3746223
9•tosh•2h ago•0 comments

Ratfactor's Illustrated Guide to Folding Fitted Sheets

https://ratfactor.com/cards/fitted-sheets
54•zdw•5h ago•9 comments

Car has more than 1.2M km on it – and it's still going strong

https://www.cbc.ca/news/canada/nova-scotia/1985-toyota-tercel-high-mileage-1.7597168
142•Sgt_Apone•3d ago•185 comments

I want everything local – Building my offline AI workspace

https://instavm.io/blog/building-my-offline-ai-workspace
952•mkagenius•23h ago•256 comments

Sandstorm- self-hostable web productivity suite

https://sandstorm.org/
126•nalinidash•11h ago•25 comments

The current state of LLM-driven development

http://blog.tolki.dev/posts/2025/08-07-llms/
3•Signez•1h ago•0 comments

Partially Matching Zig Enums

https://matklad.github.io/2025/08/08/partially-matching-zig-enums.html
127•ingve•8h ago•81 comments

Tribblix – The Retro Illumos Distribution

http://www.tribblix.org/
83•bilegeek•10h ago•23 comments

Breaking the Sorting Barrier for Directed Single-Source Shortest Paths

https://arxiv.org/abs/2504.17033
85•pentestercrab•12h ago•3 comments

A SPARC makes a little fire

https://www.leadedsolder.com/2025/08/05/sparcstation-scsi-termination-fix-magic-smoke.html
83•zdw•4d ago•11 comments

60% of medal of honor recipients are Irish or Irish-American

https://en.wikipedia.org/wiki/List_of_Irish-American_Medal_of_Honor_recipients
61•physarum_salad•2h ago•29 comments

Tor: How a military project became a lifeline for privacy

https://thereader.mitpress.mit.edu/the-secret-history-of-tor-how-a-military-project-became-a-lifeline-for-privacy/
379•anarbadalov•1d ago•179 comments

Why Wisconsin's county highways are lettered, not numbered (2019)

https://www.wpr.org/transportation/why-wisconsins-county-roads-are-lettered-not-numbered
31•kaladin-jasnah•3d ago•27 comments
Open in hackernews

Installing a Mini-Split AC in a Brooklyn Apartment

https://probablydance.com/2025/08/04/installing-a-mini-split-ac-in-a-brooklyn-apartment/
28•ibobev•3d ago

Comments

steveBK123•3d ago
Getting work done in your apartment in NYC always feels like being extorted.
righthand•2h ago
Yeah I agree. I accidentally walked out my front door without my keys in my pocket for the first time in my life. I called my property management company who sent over a technician to unlock the door. The management company intentionally does such a poor job that there is no spare key to my apartment. So the technician has to drill the lock. Surprise! The technician only claims they have a lock-drilling skill.

My phone dies and the technician says I have to call a locksmith and pay for it myself. Now I’m in small claims court for $1275 no good reason other than my property management company enabling extortion by a locksmith. All they had to do was hire or train someone into being competent lock driller.

Real estate industry in this city is a toxic grift game. People are very nice here, but these real estate people are the “assholes” in which everyone refers. The whole thing is rotten except for maybe 5% of landlords.

simonjgreen•2h ago
FWIW I would consider nobody other than me having access to a key to my apartment a feature!

That’s nuts though. Imagine a locksmith not being able to pick a lock. Like… you have one job?!

Projectiboga•1h ago
Some locks are much harder to pick.
righthand•1h ago
Especially if you don’t bring basic tools and bore the whole thing out with a drill and then give up when it doesn’t magically open.
righthand•1h ago
Because he’s not a locksmith, he is a contracted technician that performs duties in the illegal absence of a building super. There are more details to my case that will just make your jaw drop more but I chose to keep focused on the fundamentals. And yes if I owned the apartment I would not want property management having a key. However I include that detail to indicate how poorly managed my building is without listing off 10 other things.
bigbadcity•1h ago
Drilling the lock is literally what emergency locksmiths do. This isn't a Mission Impossible movie. Bet you don't forget your key now.
sejje•50m ago
Without attempting a pick?

Only the grifters.

silverlake•1h ago
Also, most of them are shockingly incompetent. It took years to assemble a list of quality service providers. I pay a little more but stuff works now.
sugarpimpdorsey•2h ago
For anyone wondering, PTAC is an acronym for one of those through-the-wall hotel room AC units.
lsaferite•18m ago
More specifically, Pass-Through Air Conditioner.
jacknews•2h ago
"but it also meant that our ground-floor neighbors don’t have a window blocked that’s under the stairs."

That's a thing you could have done, cover their window with your AC unit? It seems like something that planning regulations should prevent. And still, they have a loud compressor right next to their window.

Apreche•2h ago
I wish I could do this, but it’s not an option when you rent. PTACs have been nothing but trouble.
oceanplexian•2h ago
HVAC must be one of the most dishonest professions in the US. I’m not in NYC but received similar quotes($15-20k to do a few rooms).

Obviously having family in South America where there are millions of these installed by unskilled labor I decided to DIY. So I installed 2 units with 2 heads each, including pouring the concrete pads, vacuuming the line sets, and charging them. Took me two weekends and about $4000 in materials including the units themselves. It’s been two years, none of the BS fear mongering issues have happened, and they have almost paid for themselves.

SteveNuts•2h ago
The part that always makes me chicken out is the electrical, did you have any issues with that part?
rootsudo•2h ago
It’s really easy, 220v is not that hard to install and is the scam scam run by people installing ev chargers.

You do have to go through the permitting process which means having someone come out to view it and write off on it and if you state it properly it should be less than $200.

sowbug•1h ago
The electrical is relatively easy. It's not much harder than replacing a frayed power cord on a lamp (with an extra wire if the unit is 220 rather than 110).

Managing the lineset is the scary part (though it's not that hard). You're vacuuming copper lines that you've hopefully sealed correctly. If you get that wrong and your refrigerant yeets off into the sky, you have to call in help because it's hard for an unlicensed person to get the refrigerant legally. That half-hour of work and ~$1 of materials will cost you a punitive amount of money.

RandomBacon•1h ago
It should be super-easy these days to get the license.

Ten years ago, I downloaded a free study guide and took the test in-person at an A/C supply shop for about $50.

Today, you can take the test online.

raincom•56m ago
Thanks to ripping off by HVAC contractors, many are signing up for EPA 608 certification to get the refrigerant legally.
SkyPuncher•1h ago
Electrical is both surprisingly easy and surprisingly hard.

The actual work involved is relatively easy and straightforward. However, the code and regulations are extremely difficult to navigate. There’s a lot of non-obvious things you have to do to be code-compliant.

raincom•1h ago
Some understanding of electrical circuits, split phase motors, and control circuits (using step down transformers, relays, contactors) is extremely helpful. HVAC systems contains at least two motors--blower motor inside and compressor motor outside. And control circuits are activated by a thermostat.
raincom•1h ago
Many HVAC technicians are not good at service calls (troubleshoot and fix); they are sales people in disguise. I also heard many local HVAC/plumbing companies are owned by private equity of sorts.
threemux•1h ago
They even have DIY friendly ones now where you don't even need a vacuum pump (not that it's hard but it is one more thing). So easy
pkaye•1h ago
Private equity has been buying out HVAC companies in the US. The technician are forced to drive up sales. So instead of repairing something, they now recommend new equipment. I saw this difference in behavior at an HVAC company I used for a 10 years. The owners were retiring and the private equity bought them out. You really have to go by word of mouth and seek out the smaller companies.

Similar thing happened for Veterinary care clinics.

https://www.reddit.com/r/HVAC/comments/16asntf/lets_talk_abo...

thechao•37m ago
RAM Air in San Marcos, south of Austin. Ask for Edgar. He's self trained and likes to rebuild boards from scratch. He'll service out to west Austin if the job is big enough. He mostly trains techs. So, if you ask, he'll happily walk you through a repair in the phone. (Most jobs are only 20–40m.) He makes his money on the big jobs with repeat customers. When he retires ... fuck me.
porknubbins•27m ago
There is a very different pattern I learned to recognize with Private Equity electricians. Its not all negative- they have fast availability and good communication (because they have office staff), but that’s the end of the good stuff.

You call for one broken outlet and they pull out fancy branded folders and pens with checklists of every little thing that could possibly be upgraded (inplying its needed for safety) present you with a multi $K bill and then do a little magic 10% discount for some reason to make you think its a good deal.

That said I get my petty revenge by asking questions at the free consult (marketing opportunity) then hiring local guys instead, whenever I cam find them.

petters•1h ago
> Installation This was supposed to take a week and a half, two weeks max. It took more than a month.

This sounds very strange to me. I installed ACs on all three floors in my house in a day. (Not in the US)

sethhochberg•1h ago
If all of the trades were there on the same day and each could begin their work immediately after the prior specialist had finished it might have taken a day or a few, but it sounds like much of that month was simply waiting. If you're handy and in a part of the world where you can just do all of this work yourself at your own pace its no surprise you can be much faster.

NYC is a famously difficult place to have work like this done, especially in a shared-ownership building like a condo. You need your neighbors to agree its okay to do, your board/management company needs to review and be satisfied with the insurance your contractors carry, the city has requirements for electrical that always require permits and often require a master electrician to do the work, and even once the work starts the walls and spaces you're working in aren't exclusively yours and your contractors will be discovering things along the way... plumbing for that spigot you didn't know your neighbor had on their terrace, roof drains, etc.

The process of just getting approval to do work can vary from "chill but time consuming" in small buildings to "impenetrable bureaucracy so don't bother if you're not using the approved vendors" in large co-ops. Once it starts, that master electrician you hired to run the 220v service isn't gonna waste his time repairing drywall, a cheaper subcontractor will do that, and the latency just cranks up from there

I love city living and understand that most of these rules and regulations exist because bad things happened when they didn't - frankly I wouldn't trust most of my neighbors in buildings I've lived in to do their own electrical work or pierce the building's envelope for any reason - but also sort of understand where the outsider's perception that city homeowner life is hard and expensive comes from. It very often is, by comparison.

toomuchtodo•56m ago
There is a way around this, but it is board driven: a group buy is arranged and the entire building is done at once. The board or a GC they hire subs out the work and coordinates order of operations, and uses known good contractors from references. It’s for sure a coordination challenge, but it can be done if the will is there and residents are friendly to collaboration. Otherwise, it’s just pain.
porknubbins•1h ago
I just did an 18K BTU mini split in my garage myself with no HVAC background for around $1K and $300 in tools. For a little more capacity this guy paid 30-40x the price.

This article is a perfect example of why I moved out of NYC. Contractors there are more likely to be dishonest, less skilled and more expensive and have insane leverage over rich apartment dwellers who might own a screwdriver but basically have no ability (or permission) to do anything themselves.

Smart, productive people thus have large parts of their lives eaten up dealing with things that are trivial in a large majority of the country because of the density. I decided I’d rather spend my time pursuing my own goals not basic daily comfort.

egorfine•1h ago
> I can install some wifi extension for $1000

Take a look at Sensibo. I have one and I'm pretty happy about it.

gbil•1h ago
On a similar note, I have some Daikin AC units, expensive ones and of course they didn’t come with wifi module which Daikin prices at 100+ Euro per module. After some searching around I found the Faikin [1] project and got one module to test for around 30 Euro and it works brilliantly for 1/3 of the price and provides even more functionality from what I’ve read with seamless HA integration.

[1] https://github.com/revk/ESP32-Faikin

micromacrofoot•59m ago
yeah the wifi addons are complete rip offs, they're like $20 in components tops - plenty of people diy their own
YesThatTom2•1h ago
The best thing we can do for the environment is to tear down old houses and build modern ones in their place.

I say that even though I live in a historic house that I’d hate to see go away.

That said, I’ve spent a fortune bringing it up to modern energy efficiency standards.

JulianWasTaken•1h ago
Not directly relevant, but my PTAC in NYC started having issues this summer just as things got hot (of course).

The compressor would come on for a few seconds then shut off.

After 2 different HVAC companies quoted me $275 to come out (plus hourly and the repair once they find the issue) and then also told me it would be 10 days before they had availability I finally bit the bullet, bought a $30 multimeter, watched a few videos on how capacitor failure is super common and how to hopefully not kill myself, and after confirming with the multimeter and buying the $7 capacitor everything was right back to working with 2 minutes of work.

I did have a moment where I dreaded thinking I'd need to replace the unit and if so whether I'd want a split put in but for $53K I'd better get a third job... Quite glad not to have had to get too far down this road.

mbreese•51m ago
I had something similar happen, but for a gas boiler (hot water radiators). Our was older, but not super old. It would intermittently turn off and we couldn’t figure it out. HVAC Contractor (who we had a maintenance contract with) thought the system was toast and needed a replacement. I noticed a bad capacitor (was blown). HVAC contractor claimed they couldn’t find one through their suppliers. I had two delivered five days later.

When they came back to check the system for a full quote, the tech felt so bad that they just installed the new capacitor for free and we got another few years out of that boiler.

ipython•1h ago
They don’t say what the kWh usage is, just that the electricity cost in $$ is over $1000 on the highest month. For a unit surrounded by what should be other conditioned spaces, that’s insane to me.

A quick web search indicates that nyc $/kwh is about 31c. So that’s 3225kwh in one month! My standalone house plus pool pump, dual zone ac, and ev charger doesn’t even come close. Clearly there is a major insulation issue which is the root cause and everything else is just trying to put bandaids on an arterial bleed.

hbarka•1h ago
Old brownstone apartments probably had poor insulation. Add to it that Brooklyn electricity charges are much higher than the New York average.
SoftTalker•1h ago
> How much money did we save? Not as much as expected. The most expensive month in the next winter was $1000.

$1,000/month to heat a 3br apartment? Holy crap is he keeping it at sauna temperatures? The most I've ever spent on my poorly-insulated 1960's era bilevel house is about $250.

genocidicbunny•56m ago
If your bedrooms are upstairs, at night you might be running heat a lot less since some of the heat from the first floor rises up to the second. If you have carpet, that can create a warmer area at the floor, closer to where your beds are. So you might not need to heat things as much, or to as high a temperature to feel comfortable.

I lived in an apartment where the floor was poorly insulated. When a new neighbor moved in downstairs that heated their bedroom more aggressively at night, my heating bill went down because the heat rising from below made it less necessary to run my own heating as hard.

It might also be the difference in electricity cost. Especially with tiered rates, you can easily find yourself moving into a higher tier where every kW is significantly more expensive than in the previous tiers. PG&E in the SF Bay Area charges between 43 and 60c/kWh. A 2kW heater is going to cost about $1/hr to run , so if you're working from home, have little kids it gets expensive quick. And in the middle of a NY winter, with a poorly isolated apartment, you might well be running the heat in some capacity pretty much 24/7.

extra88•7m ago
Con Ed rates are about 0.16/kWh so in their case it's not the cost of electricity, it's all the things explained after the $1000/month line, a ridiculous lack of insulation and lack of air-tightness.

They may also keep the heat higher than most people. There's mention of an au pair so there must be a small child.

lsaferite•25m ago
I'm with you on this. That cost seems excessive. Mind you, they should including be quoting kwh usage as price varies by region. And they should be talking about the temperature differential they are maintaining.
bigbadcity•1h ago
Spending 42k instead of adding some $2/free improvised shims to fix the AC angle to drip outside sure is a life decision. Especially when you learn where this is (I won't dox the author). BKUSA baby! We attract the smartest hippest people.
genocidicbunny•52m ago
The article did mention there are other benefits, noise, improved temperature hysteresis, the ability to actually provide sufficient heat during the cold months.

Ever spend time in a hotel room with a noisy, rattly AC that turned on and off all the time because it couldn't maintain the temperatures at the set point? Hard to get decent sleep.

RatchetWerks•1h ago
I’m very happy others are documenting their heat pump installs.

It confirms three things for me.

1. Contractor quality is the biggest pain for the adoption of residential green tech.

2. Old homes (if not historic) should get depreciated aggressively by the market to the point that knock downs make sense. Japan does this.

3. DIY is has the hidden benefit of speed/quality/cost, since contractor pain is high. Yes, I understand the massive opportunity costs.

A friend of mine is trying to install a new central heat pump in their home. The only thing stopping them is contractors being hard to work with. Not price.

Here’s my DIY install.

https://www.ratchetwerks.com/heat-pump-mini-split-install

rjsw•56m ago
Your link to the Mitsubishi support site doesn't seem correct.
RatchetWerks•16m ago
I just checked the link. I believe it is correct. The domain name looks sketchy, but it has all the nitty gritty engineering data.

If I remember correctly, I think I found a link from the actual Mitsubishi website linking to it

conductr•52m ago
I also DIY a lot of things like this and find it really ironic how the DIY YouTubers I learn from are constantly better than a majority of professionals, especially given the insane costs they charge (I often see 3-4x equipment cost in my area).
raincom•30m ago
DIY YouTubers read books, experiment, learn from others, and do extra-research. Most of the trades people are not doing any of that stuff. Almost all residential trades are poorly trained: many go to some trade school, get a job at a local contractor who doesn't want to further train. Unions are good at training; however, they want people to spend four years as an apprentice.
yardie•1h ago
> Still when I ask Claude.AI to double-check the math on our power consumption, it thinks we have an incredibly leaky apartment. Like ridiculously off the charts. This also lines up with my inability to run a humidifier in the winter. I got the biggest, baddest humidifier I could find, and it barely makes a difference.

I would have started figuring this out before spending any money on a mini-split. OP, your climate envelope has failed somewhere. Spend some more money on a IR camera and try and identify where that leak is. Your basically just air-conditioning some of your apartment and some of the outdoors.

lsaferite•23m ago
Their electricity company might do the inspection as free. Ours does. They even offer grants to deal with some of the issues.
micromacrofoot•56m ago
the HVAC industry in the US is absolute highway robbery, I was quoted $10k to install a $1k mini split that took a total novice (me) a weekend to install - the most difficult part of the process was figuring out the best place to route the copper lines (because you have to be careful not to pinch them around a corner)

a friend paid a similar company the same and the work looks like total garbage, they're didn't even properly set the pad to place the outdoor unit on - and the techs are absolutely clueless about how the systems work

sizzzzlerz•55m ago
It costs next to nothing if you do it like the K-man

https://youtu.be/62NyFTAKgOI?si=SQR-FDoq3CF4UvIy

leeroihe•52m ago
Why on earth would you spend this kind of money on an apt you don't even own?
genocidicbunny•36m ago
> We bought this apartment at the end of 2023

First sentence of the Prologue.