More on Ventilation
I met a ventilation expert Thursday, and another Saturday
Expert I
I brought a ventilation expert to my school. Thursday. He, and his student, and me, the principal, and a member of my consultation committee walked through a whole bunch of spaces. They brought instruments to measure airflow, not streamers or toilet paper. They measured, observed, took notes. And they made recommendations for needed repairs, for filter inspection cycles. And they made recommendations for occupancy once MERV-13 filters are installed, and them made recommendations for occupancy before MERV-13 are installed. (Differences involved position of occupants, opening windows and doors, spaces to leave empty, where to position purifiers, etc). Based on these recommendations we feel far better.
Also, they explained some of the science. That also helps. I learned about vents and returns, and CFM and humidity and temperature, and air exchanges, and even about crack calculations. They talked about pressure differences, which reminded me of discussions of potential and voltage in high school physics. I was curious about how the air actually moved, and the expert described the shape of the flow, and where actual boundaries formed. His student quietly told me that he wished there was a way to make the air temporarily visible, so we could actually watch the movement.
That reminded me of a project I proposed decades ago. I was in my second year of high school physics, and after studying some simple wave patterns on drumheads with some neat ideas about visualizing them, we talked briefly about fluid flow (It’s complicated). I thought I might visualize some simple kinds of flow, and we discussed taking a small tank and using crystal of a magnesium salt that would CONTINUE READING: More on Ventilation | JD2718
