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The Ultra-Aire XT155H 155-pint dehumidifier by Thermastor

Ultra-Aire XT155H 155-Pint Ventilating Dehumidifier

Model: 4031070 | SKU: ul3688
Price: $2989.00
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  • Product Overview

    Keep your home's humidity level healthy and comfortable with the super-efficient, high-capacity Ultra-Aire XT155H Dehumidifier. This whole house ventilating dehumidifier removes an impressive 155 pints of moisture per day and is ideal for large homes up to 3,500 square feet. Easily ductable, this model can also be configured to supply fresh air ventilation to all the rooms of your home.

    This unit installs in your basement, crawl space, attic, closet, or mechanical room and can be used with a remote humidity controller for your convenience. Removing 7.3 pints of moisture per kilowatt hour, it's an efficient choice that's Energy Star-qualified to help you save money. Plus, like all Ultra-Aire products, it is proudly made in the USA by Wisconsin-based Therma-Stor.

    High-Efficiency Dehumidification

    The Ultra-Aire XT155H 155-Pint Ventilating Dehumidifier is incredibly efficient for its large size. This model maintains an energy factor of 3.5 liters per kilowatt hour, consumes just 8 amps max, and qualifies under the Energy Star program's stringent efficiency standards. It uses 15% less energy to remove moisture than similar-sized dehumidifiers and is constructed with a more efficient refrigeration coil, compressor, and fan. These features essentially mean this model is an incredibly efficient machine that reduces your home's overall humidity while consuming the least possible amount of energy.

    Customize the System for Your Needs

    This system is designed to integrate into your home's ductwork, creating a full-scale humidity control solution for your home. The most popular installation options for this model include installing the unit in your basement, crawl space, attic, closet, or a mechanical room. A variety of ducting accessories is available to customize a configuration for your home's needs.

    Browse and shop all Ultra-Aire XT155 H Dehumidifier Accessories

    Remote Humidity Control Options

    You must purchase a remote dehumidistat controller in order to operate this unit. Therma-Stor has a few options available. All of the control units below are wired directly to the Ultra-Aire unit using 24-volt pig tail wiring.

    • Honeywell H46C 1166 Wall-Mounted Humidistat - The Honeywell H46C is a basic analog humidistat you can use to control humidity. It features a manual dial control you'll use to set your desired humidity.
    • Ultra-Aire DEH 3000 Digital Controller - The DEH 3000 is an all-digital controller that allows you to monitor and control humidity, manage fresh air ventilation, and activate air filtration for the unit from your living space.
    • Ultra-Aire DEH3000R Digital Controller - The DEH 3000R is similar to the DEH 3000, but it also features a remote sensor that can be placed up to 100 feet away from the controller. This sensor allows you to control and monitor humidity conditions in a separate area and keep the wall-mounted controller out of sight.

    Accessories for Fresh Air Ventilation

    You may want to configure your Ultra-Aire system to provide fresh air ventilation to your home while it dehumidifies. Doing this brings fresh air into your home. Today’s well-sealed homes can create a build-up of indoor air pollutants, resulting in air that is far more polluted inside than outside.

    Sources of indoor air pollutants include fireplaces, off-gassing furniture and flooring, cleaning supplies, pets, and gas-burning appliances. Fresh air venting creates a safer living environment for you and your family. It's also a popular option for light and natural dehumidifying during drier months when you wouldn't normally run your dehumidifier. For this application, you'll need to purchase an inlet hood, your preferred ducting accessories, and a digital controller like the DEH 3000 or DEH 3000R.

    Additional Features

    • Condensate Pump Kit Available - If you prefer, you can attach an external condensate pump to customize a draining system that can drain condensate upward or across longer distances to a nearby drain.
    • MERV-11 Air Filtration - This model comes standard with a MERV-11 air filter to capture harmful allergens and particles and keep the unit running at peak efficiency.
    • Optional MERV-14 Filter Available - You can add a MERV-14 filter to improve air filtration. The MERV-14 filter is 90-95% efficient in removing particles between 0.3 and 1 micron. When you add this filter, the MERV-11 filter functions as a pre-filter.
    • Low Temperature Operation - Operates in temperatures as low as 56 degrees F and includes an auto defrost function to automatically melt frost build-up in chilly conditions.
    • Long Power Cord - A 10-foot power cord helps make installation options more flexible.
    • Made in the USA - All Ultra-Aire products are made in the USA with quality components by Wisconsin-based Therma-Stor.


    The Ultra-Aire XT155 H powerfully dehumidifies large homes up to 3,500 square feet while keeping energy consumption low for budget-friendly operation.

    What Customers Love

    • Super-Efficient Choice for Large Homes - If you like to keep a close watch on your home's energy consumption, this low-energy model is for you.
    • Fully Customizable System - A variety of accessories - including ducting kits, dampers, an external pump kit, a hang kit, added air filtration, and remote humidity controllers - help you fully customize your unit's installation to your preferred specifications.

    Things To Consider

    • Requires Professional Installation - Ultra-Aire dehumidifiers should only be installed by professional qualified contractors. You may also want to consult your contractor prior to purchasing accessories for custom installation.

    Manufacturer's Warranty

    5-Year Limited Warranty including 1 Year Parts and Labor and 5 Years on the Condenser, Evaporator, and Compressor

    Manufacturer's Literature

    Ultra-Aire XT155H Owner's Manual
    User's Guide for the Ultra-Aire 155-Pint Dehumidifier
    Spec Sheet for XT155H Dehumidifier
    Ultra-Aire 155-Pint Dehumidifier Specs

    What's In The Box?

    • Ultra-Aire XT155H 155-Pint Dehumidifier
    • 2 Round Duct Inlet Collars (6-inch and 10-inch)
    • 1 Oval Exhaust Collar (10-inch)
    • Owner's Manual

    View All Dehumidifiers »
  • Specifications

    Residential UseBasement, Crawl Space, Whole House
    Manufacturer-Suggested Room Size 3500 sq. ft.
    Practical Room Size 3500 sq. ft.
    Energy StarYes
    Energy Factor3.5 L/kWh
    Height21.75 in.
    Depth38 in.
    Weight140 lbs.
    Continuous Drain CapableYes
    Drain Hose IncludedNo
    Humidistat No
    Automatic DefrostYes
    Fan Operation Runs Continuously
    Number of Fan Speeds1
    Cubic Feet Per Minute (Max)391 CFM
    Number of Filters1
    Filter TypeMERV-11
    Auto Restart On Power FailureYes
    Refrigerant TypeR-410A
    Maximum Amperage8 Amps
    Maximum Wattage920 W
    Power Cord Length10 ft.
    Safety CertificationsUL, CSA
  • Product Q&A

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  • Reviews

    View All Ultra-Aire XT155H 155-Pint Ventilating Dehumidifier Reviews


    by PowerReviews
    Ultra-Aire XT155H 155-Pint Ventilating Dehumidifier

    (based on 1 review)

    Ratings Distribution

    • 5 Stars



    • 4 Stars



    • 3 Stars



    • 2 Stars



    • 1 Stars



    Reviewed by 1 customer

    Displaying review 1

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    Doing a great job

    By Elfthe

    from Philadelphia PA

    Verified Buyer


    • Easy To Set Up
    • Effective Water Removal
    • Quiet


      Best Uses

      • Basement
      • Multi-Room

      Comments about Ultra-Aire XT155H 155-Pint Ventilating Dehumidifier:

      I have had this installed this in a basement that is all concrete and clean. It suffered mostly from humidity from condensation in the Philadelphia summers because the area is 15º to 20º cooler than the air outside which, in Philadelphia, is laden with moisture all summer long. The unit is doing a good job, is quiet and has only raised the ambient temperature in the basement about 2º in the two months it has been running. It appears to be quite energy efficient though it is hard to tell because I am doing construction and have very irregular energy use right now. I am very happy with it. The only reason I gave it four stars instead of five is that I would really like to have a larger unit for my application and the larger units are considerably less energy efficient.

      • Primary use:
      • Business

      Displaying review 1

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