The third of five lingering thoughts that I'm taking away from the pandemic: a simple solution that will profoundly change society for the better is right in front of our noses.
All good, though $24/month in electricity for 1 to 1.5 air purifiers per classroom is about an order of magnitude higher than it would be to run during occupied hours.
Ah, had to follow the reference tree. It was for an air cleaner with a large carbon mass running at its highest speed 24h/day at $0.15/kWh consuming over 215 W, which is far below Energy Star minimum requirements. The electricity rate of $0.15/kWh is okay. But for a classroom it's unreasonable to assume the noise level is acceptable at high speed (hence high power draw) or that they would be left running for 24h/day rather when its occupied. https://ww2.arb.ca.gov/our-work/programs/air-cleaners-ozone-products/air-cleaners-removal-odorous-compounds-associated
All good, though $24/month in electricity for 1 to 1.5 air purifiers per classroom is about an order of magnitude higher than it would be to run during occupied hours.
Yes, I believe the researcher used the 'worst case' scenario and used the electricity price for the highest-cost region.
Ah, had to follow the reference tree. It was for an air cleaner with a large carbon mass running at its highest speed 24h/day at $0.15/kWh consuming over 215 W, which is far below Energy Star minimum requirements. The electricity rate of $0.15/kWh is okay. But for a classroom it's unreasonable to assume the noise level is acceptable at high speed (hence high power draw) or that they would be left running for 24h/day rather when its occupied. https://ww2.arb.ca.gov/our-work/programs/air-cleaners-ozone-products/air-cleaners-removal-odorous-compounds-associated