Ultra Aire 4044610 In-wall Dehumidifier MD33

Product Description

The ULTRA AIRE 4044610 is the MD33 Series in-wall dehumidifier, formerly sold as the Ultra-Aire MD33. It is designed for direct installation within a wall cavity, making it one of the first dehumidifiers of its type engineered to drain directly into a hub-drain or plumbing line. This eliminates the need for manual bucket emptying or portable drain pan maintenance, resulting in a continuous, hands-off dehumidification system. Licensed HVAC technicians and plumbing contractors are the primary installers, given the dual-trade nature of the unit's mechanical and drain connections.

The MD33 is suited for residential applications where space efficiency and low-maintenance moisture control are priorities. Its in-wall mounting profile keeps it out of living areas while delivering consistent dehumidification. The direct-drain design makes it appropriate for installations in basements, crawl spaces with wall access, utility rooms, and similar enclosed residential spaces where a conventional portable or ducted dehumidifier is impractical or undesirable.

Key Features

• True in-wall installation design for space-saving, unobtrusive deployment
• Direct drain connection to hub-drain or plumbing line eliminates manual condensate removal
• Continuous, hands-off dehumidification operation once installed
• Formerly marketed as the Ultra-Aire MD33, making it a recognized replacement or upgrade path for that unit

Compatibility

Designed as an OEM-style replacement and successor to the Ultra-Aire MD33 in-wall dehumidifier. Suitable for residential in-wall dehumidification installations requiring direct plumbing drain integration.

Installation Notes

Installation requires coordination between an HVAC technician and a licensed plumber, as the unit involves both mechanical and drain-line connections. Shut off all relevant electrical circuits before beginning installation and verify the wall cavity dimensions are sufficient to accommodate the unit. Condensate drain lines must be installed per local plumbing codes, including proper slope and connection to an approved drain point. Do not operate the unit without a confirmed, unobstructed drain path.

Technical Specifications

• Series: MD33
• Installation Type: In-Wall
• Drain Type: Direct drain to hub-drain or plumbing line

Standard Information

• Brand: ULTRA AIRE
• Manufacturer Part Number: 4044610