Filter Kit contains 4 – 20X20X2 MERV 13 air filters. This is enough to make a Corsi-Rosenthal Box Style Air Cleaner. Just add any 20″ Box Fan and Tape! Shipping only available within the United States.
Filter Kit contains 3 – 20X20X2 MERV 13 air filters and 2 16X20X2 MERV 13 air filters. This is enough to make a Corsi-Rosenthal Box Style Air Cleaner. Just add any 20″ Box Fan and Tape! Shipping only available within the United States.
Filter Kit contains 4- Merv 13 – 10″X10″X2″ filters (actual size 9 1/2″X9 1/2″X1 3/4″). All of the filters needed to construct a Mini Corsi/Rosenthal Box Air Cleaner. Just add fan and tape! Shipping only available within the United States.
Filter Kit contains 4 – 16X20X2 MERV 13 air filters. Shipping only available within the United States.
Filter Kit contains 4- Merv 13 – 6″X6″X1″ filters (actual size 6″x6″x3/4″). All of the filters needed to construct a Mini-Mini Corsi-Rosenthal Box Air Cleaner. Shipping only available within the United States.
Kit includes: 8 – 20X20X2 MERV 13 Filters, heavy-duty tape and HOTKREM Air Quality monitor. (Box fans not included) Make Corsi-Rosenthal Boxes in the classroom. This is a proven way to teach about indoor air quality. Kit comes with filters, tape, particle monitor and complete instructions and lesson plans.
