The Aprilaire 400 is a whole-home automatic humidifier designed to deliver consistent, balanced humidity throughout the heating season. By maintaining proper indoor moisture levels, it helps relieve common dry-air discomforts such as dry skin, irritated sinuses, scratchy throats, and static shock, while also helping to protect wood floors, furnishings, and trim from damage caused by overly dry air.

What sets the Aprilaire 400 apart is its flexible, drain-free design. Instead of requiring a direct connection to a floor drain, it uses a condensate pump for water discharge, making it an ideal solution for homes where a nearby drain is not available. This allows for easier installation in a wider range of spaces without sacrificing performance.

Equipped with automatic controls, the Aprilaire 400 continuously monitors indoor humidity levels and adjusts output as needed to maintain optimal comfort. The result is dependable, whole-home humidity control that supports a healthier, more comfortable living environment all winter long.

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