Conclusion: The Honeywell 50250-S is best used in small spaces, and does a good job of removing dust and other allergens from the air. The biggest complaint surrounding this unit is that it's noisy, noticeable even at low speeds.
Pros: Low purchase price, Good dust/pollen/smoke removal, Long lasting, cheap filters
Cons: Small coverage area, Noisy on high speed, Not Energy Star-qualified
Excerpt: This best-selling model from Honeywell has a unique round design which allows for 360-degree airflow. This allows the 50250-S to be well-suited for use in large rooms, while still remaining relatively inexpensive to purchase.