Soler & Palau S&P 2525.5UL Variable Rotary Fan Speed Controller

The Soler & Palau S&P 2525.5UL Variable Rotary Fan Speed Controller has garnered mixed reviews from users, reflecting both admiration for its design and functionality, as well as some dissatisfaction regarding certain aspects of its operation. Customers appreciate the solid Construction of the speed controller, particularly praising the positive click of the "Off" position and the gradual ramp up to full speed. The inclusion of an adjustable minimum speed feature is notably regarded as a significant benefit—it allows users to set the lowest operational speed without risking the fan's stall condition under load, which can prevent potential damage. However, the product has received criticism for a few key issues. Some users report that the controller causes an undesirable humming sound in inline fans, which was confirmed to be a normal occurrence by a technician from Soler & Palau. This has led several customers to suggest that for those seeking simpler speed control, a 2-speed rocker switch would be a preferable alternative, especially since many S&P fans come with a LO/HI option. Additionally, there was disappointment regarding a design change in the product’s labeling, where a traditional font was replaced by a more modern and standard all-caps typeface, which some users felt compromised the aesthetic they appreciated. Overall, the S&P 2525.5UL speed controller is a well-built accessory that performs its intended function effectively, yet potential buyers should Consider the operational humming and design aspects before making a purchase. **