Desiccant dehumidifier
for crawl space

Our sorption dehumidifiers are developed to protect crawl spaces from moisture, mold, and poor air circulation. With technology adapted for Nordic conditions, a stable and long-term protection for the house's structure is created.

Desiccant dehumidification adapted for crawl spaces

A desiccant dehumidifier in a crawl space is the most reliable solution for low temperatures, high humidity, and limited ventilation. Unlike traditional dehumidifiers, desiccant technology works efficiently year-round and helps reduce both mold risk and unpleasant odors.

Which dehumidifier suits your needs?

Discover our three models of desiccant dehumidifiers for crawl spaces, tailored for various needs and requirements. All models combine powerful dehumidification with OxyPlasma® air purification, which helps to reduce mold spores, odors, and airborne particles.

Guard Base

Guard Base
12 990 kr
12 990 kr
0 kr

Basic dehumidification and air purification with effective OxyPlasma® technology.

Defogging
Up to 23 L/day

OxyPlasma® Air Purification
Yes

AI-optimized operations
No

Mold program
No

Control panel
No

Installation kit
No

Läs mer
Guard Plus

Guard Plus
15 990 kr
15 990 kr
0 kr

Includes AI-optimized operation, mold programs, and control panel for better control.

Defogging
Up to 23 L/day

OxyPlasma® Air Purification
Yes

AI-optimized operation
Yes

Mold program
Yes

Control panel
Yes

Installation kit
No

Läs mer
Guard Pro

Guard Pro
18 990 kr
18 990 kr

All features from Plus as well as an installation kit for easy and quick installation.

Dehumidification
Up to 23 L/day

OxyPlasma® Air Purification
Yes

AI-optimized operation
Yes

Mold program
Yes

Control panel
Yes

Installation kit
Yes

Läs mer
Guard Base

Basic dehumidification and air purification with effective OxyPlasma® technology.

Defogging Up to 23 L/day
OxyPlasma® Air Purification Yes
AI-optimized operations No
Mold program No
Control panel No
Installation kit No
Läs mer
Guard Plus

Includes AI-optimized operation, mold programs, and control panel for better control.

Defogging Up to 23 L/day
OxyPlasma® Air Purification Yes
AI-optimized operation Yes
Mold program Yes
Control panel Yes
Installation kit No
Läs mer
Guard Pro

All features from Plus as well as an installation kit for easy and quick installation.

Dehumidification Up to 23 L/day
OxyPlasma® Air Purification Yes
AI-optimized operation Yes
Mold program Yes
Control panel Yes
Installation kit Yes
Läs mer

Desiccant dehumidifier in crawl space

Moisture in the crawl space is one of the most common problems in Swedish houses. Up to 40% of all crawl spaces have elevated moisture levels, which increases the risk of mold, rot, and odors that can spread to the living area.

A desiccant dehumidifier lowers and stabilizes humidity – and prevents problems before they arise.

How does moisture occur in the crawl space?

The most common causes of moisture problems in crawl spaces are:

  • Condensation of warm outdoor air that cools down in the crawl space
  • Evaporation from the ground surface
  • Penetration through foundation walls and leaks
  • Groundwater pressing against the structure

Important moisture levels in crawl spaces

< 60% RH – safe level

  • Minimal risk of mold
  • Materials remain dry
  • Recommended level in crawl space

60–70% RH – risk zone

  • Increased risk of mold growth
  • Requires active monitoring
  • Should be remedied with dehumidifiers

> 70% RH – high risk

  • Ideal environment for mold and rot
  • Risk of structural damage
  • Can affect indoor air and health

Consequences of high humidity in a crawl space

  • Mold and microbial growth on wood, insulation, and concrete
  • Musty odor spreading into the living space
  • Health problems such as allergies and asthma
  • Weakened construction and increased renovation costs

Install desiccant dehumidifier in crawl space

Prepare the crawl space

Remove organic material and debris. Clear away rubbish that can trap moisture. Ensure free air circulation

Choose the right location

Place the dehumidifier centrally in the crawl space. Ensure that air can circulate around the unit

Install humidifier hose

Drill a hole through the edge of the sole plate. Install the included panel. Guide moist air out of the structure

Install exhaust hose

Pull the hose to the opposite corner of the crawl space. Ensures effective air circulation. Prevents recirculation of humid air

Frequently Asked Questions

Moisture in the crawl space usually occurs when warm outdoor air cools down and condenses on cold surfaces. Ground moisture, leaks in the foundation wall, and inadequate ventilation also contribute to high moisture levels in the crawl space.

A crawl space should be below 60% relative humidity (RH). At higher levels, the risk of mold, rot, and bad odors in the crawl space increases.

A sorption dehumidifier is needed when the crawl space has recurring moisture problems, odor, or mold growth – especially in cold or poorly ventilated crawl spaces.

Desiccant dehumidifiers work effectively in low temperatures and are therefore particularly suitable for crawl spaces. They provide stable dehumidification year-round and protect the crawl space from moisture damage and mold.

A desiccant dehumidifier does not remove existing mold, but it stops mold growth by lowering the humidity in the crawl space to safe levels.

Yes. By lowering the humidity level and reducing microbial growth, the musty odor common in damp crawl spaces often disappears.

Moisture and mold in the crawl space can spread up into the living area via air leaks, causing poor indoor air quality, allergy symptoms, and odors in the house.

A dry and odourless crawl space reduces the risk of hidden moisture damage, mould, and rot – factors that can otherwise lower the value of the property upon sale.

Guaranteed dehumidification for a drier home

We offer a 30-day healthier home guarantee. If you are not satisfied with how Ozoneair Guard improves air quality and lowers humidity levels, simply return it for a full refund.

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