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1092 points kentonv | 2 comments | | HN request time: 0s | source

I wasn't quite sure if this qualified as "Show HN" given you can't really download it and try it out. However, dang said[0]:

> If it's hardware or something that's not so easy to try out over the internet, find a different way to show how it actually works—a video, for example, or a detailed post with photos.

Hopefully I did that?

Additionally, I've put code and a detailed guide for the netboot computer management setup on GitHub:

https://github.com/kentonv/lanparty

Anyway, if this shouldn't have been Show HN, I apologize!

[0] https://news.ycombinator.com/item?id=22336638

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sriram_malhar ◴[] No.42161864[source]
Amazing build, and even better, a set of long time friends. You and your wife are rich in all senses.

I was wondering what the maximum power draw you have seen. Do you monitor your energy usage during normal use and during a party with all machines buzzing.

replies(1): >>42161920 #
kentonv ◴[] No.42161920[source]
I haven't actually monitored power usage during parties. But I should do that at the next one... I have better equipment for than now that since we finished the solar install!

I suspect though that even when the game machines are running they probably don't draw all that much power compared to the HVAC. We seem to have ~10-12kW going to HVAC throughout the day... this feels broken to me (these are supposed to be high-efficiency heat pumps and such) but I haven't been able to figure out what's wrong yet.

Whereas if all the computers were drawing the theoretical maximum their PSUs support (750W each) that would be 15kW, but in practice I suspect they draw a small fraction of that most of the time, even when in-game.

replies(2): >>42162712 #>>42165327 #
1. jnsaff2 ◴[] No.42165327[source]
Have a look into Passivhaus principles.

In your case I'm surprised that a new build did not have all the heating/cooling aspects calculated. How would you even dimension your HVAC if you don't know the numbers?

There are easy and not so easy solutions:

1. heat recovery ventilation - equalizes the incoming and outgoing ventilation air temperature so you don't have to heat or cool the inside as much but still get a lot of fresh and filtered air.

2. solar shades positioned in a way that shades the sun when it's high i.e. summer time but lets sun in when it's low during the winter.

3. proper insulation and air-tightness .. a hard sell for a house that just came online.

4. ground loop heat-pumps instead of air source.

Other than that I like your house, especially fond of the integrated catwalks/doors!

replies(1): >>42165458 #
2. kentonv ◴[] No.42165458[source]
> How would you even dimension your HVAC if you don't know the numbers?

Well the people setting up the HVAC definitely ran the numbers accounting for windows, insulation, etc. The resulting system does successfully heat/cool the house.

What I'm a little unclear on is whether it was always expected to use this much power in the process. I've been struggling to get info out of my HVAC contractor, may need to hire someone else to come in and look at it.