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National Grid is offering air purifiers on discount sale as part of Earth day offers. Might be limited to east coast but I can’t verify that though.
Honeywell HEPAClean Tabletop Room Air Purifier – $ 9.99
https://techniartflashs
Winix A230 360° All-in-One 4-Stage True HEPA Air Purifier with PlasmaWave® Technology – $ 49.99
https://techniartflashs