---
date: 2024-03-08T19:28:51+00:00
modified: 2024-03-09T09:19:06+00:00
permalink: https://kaspars.net/note/mastodon-social-112062190816641962
post_type: note
author:
  name: Kaspars
  avatar: https://reverse.kaspars.net/gravatar/avatar/92bfcd3a8c3a21a033a6484d32c25a40b113ec6891f674336081513d5c98ef76?s=96&d=mm&r=g
---

# On March 8, 2024 at 21:28

[@zrail](https://hachyderm.io/@zrail) That’s lower than I expected. I have my UPS draw additional 15W on top of the 30W from NAS <https://kaspars.net/blog/powerwalker-vi-500-r1u>

A 10W source in a 20x20x20in box gives you 6.6W per m2 or 0.33W/m2 at dT=20K which is achievable with 4in of pretty much any insulation board.