Advice from a Californian: HEPA filters are expensive and sell out during fires. Get yourself a box fan and a furnace filter or two of the same size and tape them to the inlet of the fan. It is almost as effective at a fraction of the price. By box fan I mean one of these: https://m.media-amazon.com/images/I/81Omz5tqhIL._AC_UF894,1000_QL80_.jpg
Advice from a Californian: HEPA filters are expensive and sell out during fires. Get yourself a box fan and a furnace filter or two of the same size and tape them to the inlet of the fan. It is almost as effective at a fraction of the price. By box fan I mean one of these: https://m.media-amazon.com/images/I/81Omz5tqhIL._AC_UF894,1000_QL80_.jpg