Classrooms are crowded, poorly ventilated and high-stakes for air quality — which is exactly why Corsi-Rosenthal boxes were adopted so widely in schools. They deliver a lot of clean air cheaply, and building them is a ready-made STEM lesson.
681 m³/h CADR, MERV-13, under 35 dB — powerful whole-home clean air — no proprietary lock-in, ships from the UK.
Check price →Use code CORSI10 for 10% off at checkout.Why schools use them
Field studies show meaningful reductions in classroom particle levels and airborne respiratory particles. The modern target, ASHRAE 241, frames this as equivalent clean airflow per occupant — and a CR box (or a high-output kit) delivers it for a fraction of commercial cost. More: schools & offices guide and health benefits in schools.
The STEM angle
Building a CR box teaches particles, airflow and filtration hands-on, and the class keeps a working air cleaner at the end. See best practices and case studies.
Build or buy for a whole school?
Many schools build one box as a lesson, then equip remaining rooms with quiet ready kits (under 35 dB, no upkeep for staff). For quantities, invoicing and quotes, contact us or see the buying side on airpurifierkits.com. Use the contact form (coming soon).