https://blog.chughes.co/tags/hvac/Recent content in Hvac on Chris Hughes | Development JournalHugo -- 0.164.0en-usThu, 09 Jul 2026 00:00:00 +0000https://blog.chughes.co/posts/2026-07-09-maximizing-gpu-power-under-a-noise-cap-with-valveposition-co/Thu, 09 Jul 2026 00:00:00 +0000https://blog.chughes.co/posts/2026-07-09-maximizing-gpu-power-under-a-noise-cap-with-valveposition-co/<p><em>Written with Claude.</em></p> <p><img alt="Control volume diagram of the computer case: two front intake fans behind a mesh filter, CPU and GPU heat sources inside, one rear exhaust fan carrying the heat out" loading="lazy" src="https://blog.chughes.co/images/2026-07-09-maximizing-gpu-power-under-a-noise-cap-with-valveposition-co/fig-case-v2.svg"></p> <p>Same control loop, opposite target: I ended up running the exact sequence a chilled-water plant uses to reset its supply temperature, on a GPU, to hold a fan at a noise budget instead of driving a valve wide open.</p>