Whynter RPD-551EWP 50-Pint Energy Star Portable Dehumidifier with Built-in Pump

The Whynter RPD-551EWP is a sleek and powerful 50-pint portable dehumidifier, designed to effectively remove up to 50 pints of moisture from the air per day. Engineered for high-capacity performance, this unit features a built-in condensate pump, making it ideal for continuous operation in demanding environments—without interruptions or manual draining.

ENERGY STAR® Certified Efficiency

This model is ENERGY STAR® certified, ensuring energy-efficient operation that saves on electricity costs—perfect for frequent or long-term use.

Flexible Drainage Options

Enjoy hassle-free operation with three drainage methods:

• Manual drain via the large, removable 18-pint water bucket

• Gravity drain

• Built-in condensate pump, which can discharge moisture vertically up to 15 feet using the included 16.5-foot drain hose

Smart Functions for Convenience

• Auto Shutoff: Automatically powers off when the set humidity level is reached or when the reservoir is full.

• Auto Restart: Resumes operation after a power outage—ideal for areas with unreliable electricity.

Designed to handle areas up to 4,000 sq. ft., the Whynter RPD-551EWP is a space-saving, cost-effective, and reliable solution for maintaining dry, comfortable indoor air—especially in basements, large rooms, or areas prone to excess humidity.

Understanding Dehumidifier Capacity and Testing Standards

Dehumidifiers are categorized by pint capacity, which refers to the amount of moisture removed within 24 hours. However, Department of Energy (DOE) testing standards have changed over time, which impacts how these capacities are labeled:

Previous Testing Standards (Pre-2019)

• Units were tested at 80°F with 60% humidity

• Typical sizes: 30, 50, and 70-pint models

Updated DOE Standards (2019 and Beyond)

• Units are now tested at 65°F with 60% humidity

• New standard sizes: 20, 30, and 50 pints

Because cooler air holds less moisture, the testing environment—not the unit's performance—has changed. A 50-pint unit tested under the new standard performs similarly to a 70-pint unit tested under the old conditions.