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Parents, experts urge pause on IntelliPure shipments to Los Angeles after Portland purifiers debate
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Summary
Local parents and air‑quality experts at the Portland Public Schools board meeting urged district leaders to pause further shipments of IntelliPure air purifiers to Los Angeles, citing a hidden "DFS" ionizer setting on those units and risks of producing harmful indoor chemistry when used in wildfire and urban fire conditions.
Parents and indoor‑air experts urged Portland Public Schools officials on Feb. 4 to pause additional shipments of donated IntelliPure air purifiers bound for Los Angeles schools, saying the units have a default ionization feature that can create additional indoor air hazards.
Dr. Effie Greathouse, an environmental scientist and leader of Safe Indoor Air for Oregon Schools, told the board the district had been "misled" about the condition and readiness of the units and said many classrooms require more than a single purifier to reach recommended air change rates. Dr. Rachel Rochester, a parent and educator, said the superintendent had been told the district's presentation stated "all of our schools, all of our classrooms have air purifiers at the moment" — a claim Rochester called "simply not true" for schools such as Lincoln, which she said had no purifiers in classrooms.
Rebecca Shanker, calling in from Los Angeles, said the 500 IntelliPure units Portland has sent (and more currently in storage) include models with a "DFS" button that defaults to an ionizer. "The DFS button is not on all air filters. It is on the IntelliPure units, and it is a hidden ionizer," she said. "That ionizer... ends up creating even greater chemical reactions and more toxic indoor air." Shanker and local parents urged the district to stop additional shipments until staff and experts map where the units will be placed and ensure teachers know to disable the ionizer.
Local advocates cited airflow studies commissioned for specific classrooms. Dr. Greathouse described one Roosevelt High School classroom that achieves roughly 1.2 air changes per hour with no purifier; with one purifier the room reached 2.4 ACH and with two purifiers 4.1 ACH, still short of a recommended six air changes per hour for some experts. She urged the board to prioritize getting adequate purifiers into local classrooms and to work with parents on an evidence‑based plan before sending more units out of state.
Superintendent Armstrong also appeared in public comments only as the subject of criticism; speakers asked the district to halt further shipments to LA while working with local advocates on an implementation and training plan. The board did not take a vote on the matter during the Feb. 4 meeting.
District staff said they are meeting parents and technical volunteers and will follow up; public commenters asked the district to coordinate on a plan that addresses the DFS ionization setting, placement of units, and documentation of training for teachers who will operate the machines.
