My house has radiators for heat. There are three heating loops ("zones") but the house has more than three rooms and it's not very well balanced. Fixing this properly involves hiring a plumber, but it turns out we can make it much better with just a small fan!

Radiators heat passively: they warm the nearby air, which rises and allows cooler air to flow in. This new air then warms, and the cycle repeats. This works pretty well: no electricity, no noise, just smooth heating.

What we can do with a fan, though, is accelerate this process in a targeted way, at the cost of a small amount of electricity, hardware, and noise. By fanning the radiator we want more output from, we can bring the system into balance.

Far-UVC is something people have talked about for years in a "that would be great, if you could buy it" sort of way. Coming soon, once someone actually makes a good product. But the future is now, and it costs $500.

Many diseases spread through the air, which is inconvenient for us as creatures that breathe air. You can go outside, where the air is too dilute to spread things well, but it's cold out there, and sometimes wet. You can run an air purifier, but cleaning lots of air without lots of noise is still the world of DIY projects. Ideally you could just shine some light, perhaps in the 222-nm range, which would leave people alone but kill the viruses [1] and bacteria. Yes, let's do that!

Last year if you asked "if far-UV is so great, why isn't it everywhere?" one of your answers would be:

My current setup for playing dances is a bit excessive, and I transport my pedalboard in an old hardshell suitcase. [1] There's no built-in padding, so I use sheets of foam to protect my equipment. Initially I just had these loose, but this was one more piece to deal with, so I decided to permanently attach them to the suitcase.

It's tricky to bond foam to plastic, but after some LLM-assisted searching it seemed like 3M 90 spray adhesive was a good choice. I followed the instructions (outside!) and attached my foam sheets to the case:

The gates in the lobby of my workplace annoyed me for years: they would often reject my access card, and I'd need to tap several times. After a while I realized that the reader was getting confused by the other RFID cards in my wallet, and if I pulled the card out of my wallet first it worked every time.

This turned out to be very easy to fix: tape a piece of tinfoil to the back of my access card:

On a road trip there are a few common options for food:

• Bring food
• Grocery stores
• Drive throughs
• Places that take significant time to prepare food

Bringing food or going to a grocery store are the cheapest (my preference!) but the kids are hard enough to feed that we often buy prepared food when we're traveling. [1] And they often prefer food that takes a while to make (usually pizza) over what you can get in a drive through. A couple years ago I realized there's another option: calling in an order for pickup to where you'll be soon.

Summary: Anthropic has many employees with an EA-ish outlook, who may soon have a lot of money. If you also have that kind of outlook, money donated sooner will likely be much higher impact.

It's December, and I'm trying to figure out how much to donate. This is usually a straightforward question: give 50%. But this year I'm considering dipping into savings.

There are many EAs and EA-informed employees at Anthropic, which has been very successful and is reportedly considering an IPO. The Manifold market estimates a median IPO date of June 2027: