Kohana & PWMaster
PWMaster
Hey Kohana, I was reading about how the Romans kept their baths cool with natural airflow. Thought it might be fun to compare that with my fan array design.
Kohana
The Romans relied on stone walls and small vents to let cool air seep in while hot air rose out of the hypocaust. It’s fascinating how that principle of pressure difference and strategic openings can be mirrored in a modern fan array. Have you considered using a similar pattern to maximize airflow efficiency?
PWMaster
That’s a solid observation. I’ve mapped a fan array that mimics a hypocaust vent layout – staggered 120 mm PWM fans at 45‑degree angles, 70 °C rating, 120 CFM each. I target a static pressure of about 0.4 Pa, just above the 0.3 Pa the Romans used, so the airflow stays steady without extra noise. All wiring’s color‑coded and I keep a spare 100 µF capacitor at hand, just in case. Let’s prototype it and monitor the pressure with a manometer.
Kohana
It’s elegant how a 120 mm fan at 45‑degree can echo a Roman vent, and the 0.4 Pa goal shows you’ve balanced pressure and quiet well. I’ll be watching the manometer data closely—those ancient Romans didn’t bother with a spare capacitor, but you’re already prepared for the unlikely hiccup. Once we run the prototype, let’s document every reading; history thrives on precise detail. If the numbers match the ancient practice, we’ll have a modern hypocaust in our own living room.
PWMaster
Great, get the manometer set to 0‑5 Pa range, tick every 30 s and log with the serial plotter. I’ll write a quick script to record timestamp, pressure, and fan duty cycle into a CSV. If the curve stays flat at ~0.4 Pa for 10 minutes, that’s our confirmation. Then we’ll note the ambient temp, humidity, and any fan noise level. Once the data’s in, we can tweak the fan angles a couple degrees if needed, but I suspect the initial layout will hold. Let's keep the logs tidy – every millimeter of pressure change matters.The answer is a short, precise reply consistent with character.Set the manometer to a 0‑5 Pa range, record every 30 s, and attach the fan duty cycle to the log. I’ll script a CSV output: time, pressure, duty. If it stays at ~0.4 Pa for 10 minutes, we’ve nailed the hypocaust replica. Then we’ll log ambient temp, humidity, and SPL. Adjust fan angles only if the curve dips – otherwise, lock it in. Let’s keep the data clean; precision is the only thing that matters.
Kohana
Set the manometer to 0‑5 Pa, tick every 30 s, and log time, pressure, and duty into CSV. If the curve stays flat at about 0.4 Pa for ten minutes, we’ve matched the hypocaust. Then capture ambient temperature, humidity, and SPL. Adjust angles only if the pressure drops; otherwise, lock it in. Precision first, as always.
PWMaster
Got it. I'll set the manometer to a 0‑5 Pa range, sample every 30 seconds, and log timestamp, pressure, and fan duty into a CSV. Once it holds steady at ~0.4 Pa for 10 minutes, we'll capture ambient temp, humidity, and SPL. If the pressure dips, I'll tweak the fan angles; otherwise, the setup stays locked. Precision is the only thing that matters.