Reviews of Oreck air purifiers can be found on Amazon. Consumer Affairs also has a list of many of the top complaints that customers have found with Oreck air purifiers.
The reviews on Amazon are extremely mixed, with the average being a 3.5 star rating. The most common favorable reviews state that Oreck purifiers work and have truly made a difference in the quality of air. One of the most common complaints of the unfavorable reviews is that the purifiers are very difficult to clean and maintain.
Some of the top complaints, according to Consumer Affairs, are that the air purifiers quit working and were ineffective at removing dust in the air.