Skip to content

Cart

Your cart is empty

Continue shopping

Perfect for maintaining comfort and air quality inside your trailer when you travel to areas with high humidity, the Airstream Ultimate 4000 Dehumidifier for Travel Trailers is a powerhouse dehumidifier that's small enough to stow away inside your Airstream when you're not using it. Not only does it work to improve interior air quality and comfort when used regularly, but it also provide excellent drying capabilities for wet towels and bathing suits when laundry facilities are hard to come by.

The first RV dehumidifier to use innovative rotary desiccant technology to provide high volume dehumidification without requiring a compressor, the Airstream Ultimate 4000 Dehumidifier is designed for low maintenance operation. It features a high-capacity water catch basin and the option for attaching a self draining hose (hose not included). The Airstream Ultimate 4000 Dehumidifier also includes a built-in ionizer that helps freshen interior air. 

Use the Airstream Ultimate 4000 Dehumidifier in the main cabin of your Airstream travel trailer, or set it up inside your trailer's shower to create an excellent "drying room" for wet towels, bathing suits, and gear. A built-in "Dryer Mode" and electronic louvers help direct warm, dry air at wet gear, and a convenient timer provides versatility. 

Product Features
Specs
  • Operating temperature range: 34°F – 104°F
  • Moisture removal: 7 liters/day (at 68°F; relative humidity 60%)
  • Water tank capacity: 2 liters
  • Power: High 615W, Low 330W
  • Voltage: 120V; 60Hz
  • Amperage: High Speed: 5.15 AMPS; Low Speed: 2.76 AMPS
  • Net weight 13.5 lbs
  • Product size: 18″H x 11.5″W x 7″D
Features
  • Compressorless dehumidifier uses desiccant rotor technology to remove moisture from the air
  • Environmentally friendly with no harmful gasses
  • Quiet operation: 34db at low fan speed; 51db at high fan speed
  • Special silver coating within the filter kills bacteria on contact, improving the quality of air in your home or office
  • Built-in ioniser
  • Built-in humidistat
  • Continuous drain capability: 12mm (15/32”) inner diameter hose.
  • Dryer mode and electronic louvers can be used to direct warm air to dry clothes, rugs, coats and more; ideal for laundry rooms and mud rooms
  • Dryer mode includes power saving setting for summer use and turbo setting for winter
  • Up to 8 hour timer for added convenience
  • Removable water bucket with handle
  • Operating light
  • Auto restart after power cut. Once the power is restored after a power failure, the appliance will continue to operate at the selected settings.
Shipping FAQ
This item is considered oversized due to the weight or dimensions of the package

Oversized items are excluded from flat rate shipping or over free $150+ shipping

Canada + International

Duties and taxes are not prepaid and are the responsibility of the customer

Shipping Carrier

Once your order has shipped, delivery is managed by the carrier selected. While we will always do our best to help if issues arise, delays during transit are outside of our control. Once your order left our warehouse, delivery times are handled by the carrier and may be subject to delays outside of our control.

US Orders for Oversized Items
  • UPS Ground (~3-7 business days)

Canada Orders for Oversized Items
  • Fedex International Connect Plus (~ 4 business days)
  • UPS Standard (Duties and customs are not prepaid, customers are responsible for payment)

International Orders for Oversized Items
  • UPS Standard (~4-9 business days)
Order Processing Time

Orders placed on business days before 1 p.m. EST
Every effort will be made to ship your order within one business day.



Orders placed after 1 p.m. EST, on a weekend, or on a bank holiday
Every effort will be made to ship your order within the following two business days.

*For more information on our shipping times and rates, please view here.

Return Policy

We're happy to process a return for a full refund for any unused, uninstalled and unworn items still in their original packaging within 60 days of the shipment date. Unfortunately, we cannot process requests for refunds or exchanges after this time period.

You are responsible for return shipping fees for any returns or exchanges.

For a detailed overview of our return policy, please view here.

Airstream Ultimate 4000 Dehumidifier for Travel Trailers

Sale price$320.00
Read all reviews
Shipping + Delivery

When we were tasked with creating our shipping policy, we thought a lot about what’s most important – the speed of delivery, or the safety of your order? After some long talks, we decided that speed and quality handling don’t have to be mutually exclusive. So we partnered with the best shipping carriers in the U.S. to get your goods to you on-time and in one pristine piece. Enjoy.

Because we work with many partners across the country and around the world, many of the items available on Airstream Supply Company ship directly from the warehouses of our partner brands. As a result, shipping times can vary. No worries, for specific shipping details, we recommend clicking on the Shipping FAQ section found on the product page. Simply scroll down to the bottom section on the item’s page you wish to purchase for more detailed shipping information.


Domestic US Shipping

Standard Size/Weight Items

  • Orders under $150 have a $10 flat rate fee per warehouse location. The maximum shipping fee will be $20 based on our two warehouse locations. (USPS or UPS)
  • Orders over $150 (post discount cart total) quality for free Economy Shipping* (USPS or UPS) 5-8 Days (Oversized shipping excluded, please see oversized shipping for more information)

Oversized Items

  • Large or heavy oversized items will incur additional shipping fees, calculated at checkout based on your location
  • These items still count toward your free shipping threshold but will include an added surcharge

Chemicals

  • Not eligible for free shipping
  • Ship via ground services only (USPS or UPS)
  • Rates are calculated at checkout based on destination



Outlying US Shipping (Alaska + Hawaii)

Standard Size/Weight Items

  • No free shipping over $150 available
  • You will be charged a flat rate fee per vendor location

Oversized Items

  • Additional fees apply and are calculated at checkout

Chemicals

  • Cannot be shipped to Alaska or Hawaii

 

Canada + International (Including Puerto Rico)
  • Free shipping is not available
  • Shipping rates are calculated at checkout using our negotiated carrier rates
  • UPS, USPS, or FedEx- depending on the warehouse
  • Duties and taxes are not prepaid and are the responsibility of the customer

Please ensure you select the appropriate shipping method. We are not responsible for delays or packages held due to unpaid duties or taxes.

A gray scalloped circle with a checkmark in the center, resembling a verification or approval badge.

Official Airstream

Your official source for parts, gear, and outfitting.

A simple gray outline of a shield shape on a light background.

Premium Quality

Products designed & tested for the road.

The Airstream Ultimate 4000 Dehumidifier for Travel Trailers is a white, rectangular unit featuring a front-facing control panel and a top air vent, shown against a plain white background—ideal for use as a travel trailer or RV dehumidifier.
Airstream Ultimate 4000 Dehumidifier for Travel Trailers Sale price$320.00
  • 5 stars: 2 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Loretta S. (Indianapolis, Indiana)
A new found friend at the Top of Georgia recommended this to help with drying out towels

A new found friend at the Top of Georgia recommended this to help with drying out towels. We ordered it the same day and received it when we returned home.I tried it out with drying clothes that I hang up wet. It did a fantastic job!!! We took it on our next trip and sure enough, our towels dried really quick! I would highly recommend this!! I ran it during our showers in our 33’ 2026 Classic and it took care of a lot of the moisture I was having to squeegee off the shower walls.