6 Best Smart Crawl Space Dehumidifiers of 2026
We compared six smart crawl space dehumidifiers on app features, capacity and drainage.
By Daniel Brooks
Updated October 28, 2026
You rarely see inside a crawl space, so knowing its humidity from your phone is worth a lot. Our list of the best smart crawl space dehumidifiers compares six Wi-Fi or app-connected units on capacity, alerts and drainage.
Check that your Wi-Fi reaches the crawl space before you buy. To browse every model we cover, visit our Whole-House & Crawl Space Dehumidifiers page.
All Products Compared
| Product | Best For | Capacity | Coverage | Drainage | Notable |
|---|---|---|---|---|---|
| ALORAIR Smart Wi-Fi 120 Pint Dehumidifier | Overall | 120 pints saturation, 55 PPD AHAM | Up to 1,300 sq ft | Pump and hose | Wi-Fi app, Energy Star |
| AprilAire E100W Wi-Fi Dehumidifier | Whole house | 100 PPD | Up to 5,500 sq ft | Hose or drain | Wi-Fi, Bluetooth, app |
| ALORAIR Smart Wi-Fi 70 Pint Dehumidifier | Compact | 70 pints saturation, 35 PPD AHAM | Up to 1,000 sq ft | Pump and hose | Wi-Fi app |
| Dri-Eaz PHD 200 Dehumidifier | Pro monitoring | Commercial | Crawl spaces, basements | Auto pump-out | Command Center Pro app |
| Dri-Eaz DrizAir 130P Dehumidifier | Large homes | Up to 130 pints | Up to 6,400 sq ft | Pump, 40 ft hose | Wi-Fi and Bluetooth |
| MOUNTO 268 Pint Wi-Fi LGR Dehumidifier | Restoration | 268 pints max, 155 PPD rated | Job sites, grow rooms | Pump, 24.6 ft hose | Wi-Fi, 300 CFM |
| Award | Product | WikiCooling Score About WikiCooling ScoreThe WikiCooling Score is our own rating from 0 to 10, based on the criteria described on our How We Review page. It reflects research, not laboratory measurement, and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | |
|---|---|---|---|
| Best Budget |
ALORAIR Smart Wi-Fi 120 Pint Dehumidifier
|
Buy | |
AprilAire E100W Wi-Fi Dehumidifier
|
Buy | ||
| Best Overall |
ALORAIR Smart Wi-Fi 70 Pint Dehumidifier
|
Buy | |
| Best Premium |
Dri-Eaz PHD 200 Dehumidifier
|
Buy | |
Dri-Eaz DrizAir 130P Dehumidifier
|
Buy | ||
| Best Value |
MOUNTO 268 Pint Wi-Fi LGR Dehumidifier
|
Buy |
Top 3 Smart Crawl Space Dehumidifiers Reviewed
#1 ALORAIR Smart Wi-Fi 120 Pint Dehumidifier: Best Overall
Why We Picked It
ALORAIR’s Smart Wi-Fi 120-pint unit lets you check crawl space humidity and change settings from a phone app, and adds a pump and ENERGY STAR certification.
Crawl spaces are out of sight, which is exactly why remote monitoring helps. This ALORAIR connects to a free Wi-Fi app that shows real-time humidity, lets you adjust the set point and tracks operation from anywhere. Underneath it is the same 120-pint platform: 55 PPD at AHAM and up to 120 pints at saturation, for spaces up to 1,300 sq ft, with ENERGY STAR certification. A built-in pump and the included hose handle continuous drainage, and auto defrost keeps it running in cool months. It is cETL certified.
Key Specifications
- Capacity: 120 pints at saturation, 55 PPD at AHAM
- Coverage: Up to 1,300 sq ft
- Smart Control: Wi-Fi app
- Drainage: Built-in pump and hose
- Certification: ENERGY STAR, cETL
- Weight: 41.7 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
Check that your router signal reaches the crawl space before you rely on the app.
Best For
This dehumidifier is best for crawl spaces you cannot easily check.
Check the current price and availability of the ALORAIR Smart Wi-Fi 120 Pint Dehumidifier on Amazon.
#2 AprilAire E100W Wi-Fi Dehumidifier: Best Whole-House
Why We Picked It
AprilAire’s E100W adds Wi-Fi and Bluetooth to a 100 PPD whole-house dehumidifier, with alerts, diagnostics and control through the Healthy Air app.
The E100W covers crawl spaces, basements and whole houses up to 5,500 sq ft at 100 PPD. Pair it with the Healthy Air app over Bluetooth in a few minutes, then connect it to Wi-Fi for remote control, alerts, diagnostics and updates on your phone. Operation is set-and-forget: it dehumidifies until the set point is reached, then samples periodically to decide when to resume. Top or end air discharge suits different installations, and an 8-foot power cord adds placement flexibility.
Key Specifications
- Capacity: 100 PPD
- Coverage: Up to 5,500 sq ft
- Smart Control: Wi-Fi, Bluetooth, Healthy Air app
- Discharge: Top or end
- Power Cord: 8 feet
- Weight: 64 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
If you do not need app control, the standard E100 costs less.
Best For
This dehumidifier is best for whole homes you want to monitor remotely.
Check the current price and availability of the AprilAire E100W Wi-Fi Dehumidifier on Amazon.
Read our full AprilAire E100W Wi-Fi Dehumidifier review.
#3 ALORAIR Smart Wi-Fi 70 Pint Dehumidifier: Best Compact
Why We Picked It
The Smart Wi-Fi 70-pint ALORAIR brings app control and a condensate pump to a compact crawl space body sized for spaces up to 1,000 sq ft.
This is the smaller sibling of ALORAIR’s Wi-Fi line. The app shows live humidity, lets you fine-tune settings and monitors operation while you are away. It removes 35 PPD at AHAM and up to 70 pints at saturation for crawl spaces and basements up to 1,000 sq ft. A high-performance condensate pump and included hose handle drainage over distance or upward, and the compact body fits tight crawl spaces. Auto defrost and ALORAIR’s 6-year limited warranty are included.
Key Specifications
- Capacity: 70 pints at saturation, 35 PPD at AHAM
- Coverage: Up to 1,000 sq ft
- Smart Control: Wi-Fi app
- Drainage: Built-in pump and hose
- Defrost: Automatic
- Weight: 38.18 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
It suits smaller crawl spaces; for larger homes, the 120-pint Wi-Fi model has more capacity.
Best For
This dehumidifier is best for small crawl spaces you want to watch remotely.
Check the current price and availability of the ALORAIR Smart Wi-Fi 70 Pint Dehumidifier on Amazon.
Other Models Worth Considering
Dri-Eaz PHD 200 Dehumidifier. Dri-Eaz’s PHD 200 adds app monitoring and drying-progress readouts in a crawl space friendly size.
Dri-Eaz DrizAir 130P Dehumidifier. Dri-Eaz’s DrizAir 130P removes up to 130 pints with Wi-Fi app control and a 40 ft hose.
MOUNTO 268 Pint Wi-Fi LGR Dehumidifier. MOUNTO’s Wi-Fi LGR unit is rated at 155 pints with app monitoring.
What to Expect from Smart Crawl Space Dehumidifiers
Crawl space and whole-house dehumidifiers are built to run for months without attention. There is no bucket: water leaves through a gravity hose or a built-in pump, the coils are protected against corrosion, and auto defrost keeps them working in cool, damp spaces where a household unit would ice up and stop.
For more options, see our guides to crawl space dehumidifiers and ALORAIR dehumidifiers. For single rooms, our portable compressor dehumidifiers guide covers bucket models. The product cards show the current price for each dehumidifier.
How to Choose Smart Crawl Space Dehumidifiers
Think About Monitoring
You rarely look inside a crawl space, so a way to check it helps. Options include Wi-Fi apps, wired remote panels you can mount outside the access door, and separate humidity sensors.
Compare AHAM Ratings, Not Saturation Numbers
Most listings quote two capacities. The big number is measured at saturation, around 90 degrees F and 90% humidity, conditions a crawl space rarely sees. The AHAM figure, measured at 80 degrees F and 60% humidity, is far more useful for comparing units, and it is usually about half the saturation number.
Plan the Drainage First
A gravity hose works when a floor drain, sump or exterior opening sits lower than the unit. If water has to go up and out, through a rim joist or to a basement sink, choose a model with a built-in condensate pump and check its lift height.
Seal the Space Before You Dehumidify
A dehumidifier in a vented crawl space ends up drying the outdoors. Close vents, lay a sealed vapor barrier and fix gutters and grading first; the dehumidifier then only has to handle what is left.
How We Evaluate Smart Crawl Space Dehumidifiers
We rank dehumidifiers on manufacturer specifications and listing details: rated capacity and the conditions behind it, coverage, drainage, efficiency, build and warranty. We kept only new, in-stock units and left out renewed listings and bucket-style household models. For this list we kept only units with Wi-Fi or app control, then weighed capacity and drainage.
Frequently Asked Questions
Is Wi-Fi worth it on a crawl space dehumidifier?
If the crawl space is hard to reach, yes. Alerts tell you about problems before mold does.
What humidity should a crawl space be?
Most experts aim for 45% to 60%. Below that wastes energy; above it invites mold and wood rot.
Should a crawl space dehumidifier run all the time?
It should stay on, but a humidistat switches the compressor on only when humidity rises above the set point.
Do I need a pump?
Only if there is no drain lower than the unit. Otherwise a gravity hose is simpler and has no pump to fail.
Final Verdict
The ALORAIR Smart Wi-Fi 120 Pint Dehumidifier is the best smart crawl space dehumidifier, pairing app monitoring with a pump and ENERGY STAR. For whole-house control, choose the AprilAire E100W Wi-Fi Dehumidifier, and for smaller spaces, the ALORAIR Smart Wi-Fi 70 Pint Dehumidifier.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.