ALORAIR 70-Pint Crawl Space Dehumidifier — Basement, Gravity Drain Hose

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What the ALORAIR 70-Pint Crawl Space Dehumidifier Is

The ALORAIR 70-Pint Crawl Space Dehumidifier is a compact, commercial-duty unit built to control moisture in crawl spaces, basements, and other damp areas up to about 1,000 square feet. It runs on an automatic humidistat, resumes at your setting after a power blip thanks to memory starting, and — the feature that makes it a true crawl-space machine — clears its own coils with an automatic defrost system so it keeps pulling water in cold spaces where a basic dehumidifier would ice over and stall. It moves 115 CFM of air, runs quietly at under 50 decibels, drains continuously through a 6.5-foot gravity hose, and is ETL listed with a 6-year limited warranty. It is the moisture-extraction stage of a drying setup: pair it with air movers that evaporate water off wet surfaces, and step up to a larger LGR restoration dehumidifier when the job is a full flood.

Two numbers keep this honest, and they are the ones most listings blur. First, the 70-pint rating is measured at saturation — 90 degrees Fahrenheit and 90 percent relative humidity, the industry's high-humidity test point. Under the standard AHAM condition it removes about 35 pints per day, and that is the figure to size around for a real crawl space. Second, this ASIN is the gravity drain-hose version: it drains downhill through the 6.5-foot hose and needs a drain point lower than the unit — it is not the separate pump-equipped model that can push water up and out. Plan the drain path before you buy, and if your drain sits above the dehumidifier, choose the pump version or add a condensate pump. And a dehumidifier controls humidity to prevent mold and rot — it does not remove mold that is already growing, which needs proper remediation and respiratory protection.

Moisture Control vs. Restoration vs. Remediation

It helps to place this machine in the three jobs it touches. For everyday moisture control, it is a permanent crawl-space or basement fixture: set the humidistat, run the gravity drain to a sump or floor drain, and let it hold the space below the humidity where mold and wood rot take hold. For water-damage restoration, it is the extraction leg of the drying process — air movers push air across wet materials so moisture evaporates, and the dehumidifier pulls that moisture out of the air so it does not just re-condense elsewhere; for a large multi-room loss you scale up to a 310-pint LGR unit. What it does not do is remediation: killing and removing existing mold. That is a separate discipline with containment and a HEPA air scrubber to capture airborne spores, and for large or regulated abatement it belongs with licensed professionals.

Knowing which job you are in tells you what else to stage. A sealed, encapsulated crawl space with this unit holding humidity may need nothing more. An active leak or flood needs air movement and, if materials stay wet, a bigger machine and possibly an air scrubber if the drying stirs up dust or spores. And any job where you disturb existing mold needs respiratory protection matched to the task — our guides to the right cartridge for mold remediation and the Moldex 2200 vs. 2300 respirators help you pick. Controlling the moisture is what keeps a remediated space from re-growing mold; it is the maintenance half of the fight, not the cure.

Where It Fits and Where It Doesn't

This is the right unit for holding a crawl space or basement up to about 1,000 square feet at a safe humidity, and for the extraction stage of a modest water-damage drying job. It is the wrong unit if you needed a pump to lift water uphill, a large-loss flood machine, or a device that resolves an existing mold problem on its own. Match it to the load — a tight, encapsulated space or a modest dry-out — plan the gravity drain, put it on a GFCI circuit, and pair it with air movers and, where spores are in play, a HEPA scrubber and the right N95 or better respirator. Sized and drained correctly, it is a quiet, self-managing way to keep a space dry.

Specifications

Specifications reflect the manufacturer listing; ratings vary with temperature and humidity, so confirm current details on the product page before ordering.

Frequently Asked Questions

What is the ALORAIR 70-Pint Crawl Space Dehumidifier?

It is a compact, commercial-duty dehumidifier for controlling moisture in crawl spaces, basements, and other damp areas up to about 1,000 square feet. It runs on an automatic humidistat, drains continuously through a gravity hose, defrosts itself for cold-space operation, and is built for both everyday humidity control and water-damage drying. Its purpose is to keep a space dry enough to prevent mold and wood rot.

Does it really remove 70 pints of water a day?

The 70-pint figure is measured at saturation — 90 degrees Fahrenheit and 90 percent relative humidity — which is the industry's high-humidity test condition. Under the standard AHAM condition it removes about 35 pints per day, and that is the number to plan around for a typical crawl space or basement. It is honest to think of this as a 70-pint-at-saturation, roughly 35-pint-AHAM machine, not a unit that pulls 70 pints in ordinary conditions.

How is the water drained — is there a pump?

This version drains by gravity through a 6.5-foot hose, so it needs a drain path that sits lower than the unit — a floor drain, sump, or a spot where the hose can run downhill. It is not the pump-equipped model; a built-in condensate pump that can push water up and out is a separate ALORAIR SKU. If your drain point is above the dehumidifier or far away, plan for the pump version or add a condensate pump rather than assuming this one lifts water.

How much area does it cover?

ALORAIR rates it for spaces up to about 1,000 square feet, but that is a manufacturer figure under favorable conditions. Real coverage depends on ceiling height, how well the space is sealed and insulated, and how much moisture is coming in — an open, wet, or leaky crawl space asks more of any dehumidifier than a sealed, encapsulated one. Treat 1,000 square feet as an upper bound for a reasonably tight space, and size up if the load is heavy.

Will it get rid of existing mold?

No. A dehumidifier controls humidity to stop mold and wood rot from growing or spreading, but it does not kill or remove mold that is already there. Existing mold has to be remediated — that means containment, HEPA air scrubbing, physical removal, and the right respiratory PPE — and large or regulated jobs should go to licensed professionals. Use the dehumidifier to hold the moisture down so a remediated space stays clean, not as a substitute for the remediation itself.

Does it work in a cold crawl space?

Yes — it has an automatic defrost system that clears frost from the coils so it keeps extracting moisture in low-temperature spaces where a basic dehumidifier would ice up and stall. That is a big part of what makes it a crawl-space unit rather than a room appliance: crawl spaces run cold, and auto defrost is what lets a dehumidifier keep working there through cooler months.

Is it loud?

It runs at under 50 decibels, which is quiet enough to leave going without it being intrusive — roughly the level of a quiet conversation. In a crawl space or basement you will barely hear it upstairs, and even in a living area it is a low background hum rather than the roar of a shop fan or a restoration blower.

Can I leave it running unattended?

Yes, that is the intended use. Set the humidistat to your target humidity and it cycles itself to hold it; memory starting means it resumes at your setting after a power interruption rather than staying off; and the continuous gravity drain means no reservoir to empty, as long as the hose runs to a working drain. Check the hose and drain periodically, but the unit is designed to run maintenance-light for long stretches.

What do I need to safely enter a crawl space to install it?

Treat the crawl space itself as the hazard. Many crawl spaces meet the definition of a confined space — limited entry and egress, not designed for continuous occupancy — so assess the atmosphere and follow confined-space precautions before you go in, and never enter a space you suspect has a hazardous or low-oxygen atmosphere. Because it is a 115-volt appliance in a damp area, plug it into a GFCI-protected circuit, keep the cord and connections off wet ground, and route the drain hose so water goes to the drain, not across the floor.

When should I size up to a larger unit?

Move up when the job is bigger than steady crawl-space or basement humidity control — an active flood, a multi-room water loss, or a space well over 1,000 square feet or with a heavy ongoing moisture load. A larger LGR (low-grain refrigerant) restoration dehumidifier pulls far more water per day and is built for aggressive structural drying. Match the machine to the load: this unit for maintenance and modest drying, a bigger LGR for large-loss restoration.

Is this for water-damage restoration or everyday humidity control?

Both. It is commercial-duty enough for water-damage drying — pairing with air movers to move air across wet surfaces so the water evaporates and the dehumidifier can extract it — and it is equally at home holding a crawl space or basement at a safe humidity year-round to prevent mold and rot. That dual role is why it sits in the restoration category but also makes sense as a permanent crawl-space fixture.

Does it need any special power or setup?

It runs on a standard 115-volt outlet and does not need special wiring, but it should be on a GFCI-protected circuit given the damp environment. Setup is straightforward: place it level, run the 6.5-foot drain hose to a lower drain, set the humidistat, and let it run. In a crawl space, position it where the airflow can circulate and where you can reach the hose and controls without a full crawl each time.

What is the ALORAIR 70-Pint Crawl Space Dehumidifier not?

It is not a 70-pint-in-normal-conditions machine (that is the saturation rating; AHAM is about 35 pints), not a pump unit (it drains by gravity through a hose; the pump is a separate model), not a mold remover (it controls moisture to prevent mold — existing mold needs remediation and PPE), and not a large-loss flood machine (a bigger LGR handles those). It is a compact, quiet, auto-defrost crawl space and basement dehumidifier for controlling moisture up to about 1,000 square feet.

Reviewed by Steven Eaton, WC Safety. Specifications reflect the manufacturer listing and are provided to help you size and place the unit correctly; ratings vary with temperature and humidity, so confirm current details on the live product page before ordering.