Which Type of Dehumidifier Is Better for Water Damage Restoration?

In the past, high indoor humidity could cause mold on walls and ceilings, raised wooden floors, and a pervasive moldy smell, causing various adverse reactions to the human body. With the widespread use of dehumidifiers in both household and commercial settings, people's quality of life and work experience have been greatly improved. Dehumidifiers can be classified into various types based on their working principles, usage scenarios, and installation methods. The following are common classifications of dehumidifiers:

 

Dehumidifiers are classified according to their working principles

Refrigerant dehumidifier

A refrigerant dehumidifier uses a compressor to cool the air, causing water vapor in the air to condense into water droplets on the condenser, thereby reducing the relative humidity in the air.

Advantages: The refrigerant dehumidifier has high dehumidification efficiency and is suitable for environments with high humidity.

Disadvantages: Refrigerant dehumidifiers have relatively high noise levels and are sensitive to environmental temperature, especially at low temperatures, where work efficiency decreases.

Application: The refrigerant dehumidifier is suitable for households, offices, warehouses, basements, etc.

Dessicant dehumidifier

Principle: The dessicant dehumidifier absorbs moisture from the air through a honeycomb-shaped moisture-absorbing wheel, without using any refrigerant.

Advantages: Dessicant dehumidifiers are more suitable for working in low-temperature environments and operate quietly.

Disadvantages: Dessicant dehumidifiers have high energy consumption and limited applicability.

Application: The dessicant dehumidifier is suitable for places with high humidity requirements, such as precision electronic equipment rooms, laboratories, and food storage.

Peltier dehumidifier

Principle: The Peltier dehumidifier utilizes semiconductor cooling fins (Peltier effect) for condensation dehumidification.

Advantages: The Peltier dehumidifier has a small size and low noise.

Disadvantage: The Peltier dehumidifier has weak dehumidification capacity and is only suitable for small spaces.

Application: The Peltier dehumidifier is suitable for wardrobes, bookcases, and small storage rooms.

 

Dehumidifiers classified by usage scenarios

Household dehumidifier

Features: The household dehumidifier has a moderate volume, low noise, and simple operation.  

Usage: Household dehumidifiers are generally used in daily living spaces such as bedrooms, living rooms, kitchens, bathrooms, etc.

Industrial dehumidifier

Features: Industrial-grade dehumidifiers have a large dehumidification capacity and are suitable for large spaces.

Usage: Industrial dehumidifiers are generally used in warehouses, factories, underground garages, breeding farms, etc.

Commercial dehumidifier

Features: The dehumidification capacity of commercial dehumidifiers is between household and industrial, with more comprehensive functions.

Usage: Commercial dehumidifiers are commonly used in office buildings, hotels, shopping malls, libraries, etc.

Special dehumidifier

As the name suggests, a special dehumidifier is a dehumidifier used in specific industries or extreme environments, such as marine dehumidifiers, explosion-proof dehumidifiers, and anti-corrosion dehumidifiers.

 

LGR dehumidifier for water damage restoration

The dehumidifier specifically used for Water Damage Restoration is the LGR dehumidifier (Low Grain Refrigerator Dehumidifier). LGR dehumidifier is an upgraded version of a condensing dehumidifier, which adds DEEP-SUPERCOOLING technology and a two-stage condensing system on the basis of conventional compressor dehumidification, and can continuously and effectively dehumidify in environments with lower humidity.

LGR = Low Grain Refrigerant

Grain refers to the moisture content in the air (in grains/lb of air)

LGR means that even if the humidity is already very low, it can continue to "squeeze out" the moisture in the air

Preair, one of the most reliable dehumidifier manufacturers, specializes in developing LGR dehumidifiers to continuously provide finished products for restoration companies and OEM machines for B2B merchants.

 

Key features of a specialized dehumidifier for flood repair:

Characteristic：	Describe：
High dehumidification capacity	It can dehumidify 70~150+liters per day, suitable for rapid drying after severe water seepage and flooding.
Large applicable area	Suitable for various room sizes, including homes, shops, basements, warehouses, etc.
Low humidity working ability	Even if the environmental humidity drops below 40%, it still works stably.
Durable and sturdy design	Most of them are industrial-grade structures with characteristics such as impact resistance, corrosion resistance, and dust prevention.
Cooperate with other devices for use	Often paired with air purifiers, fans, and air movers to improve drying speed.
Convenient drainage	Support continuous drainage or automatic pumping, suitable for long-term unmanned operation.

 

Common application scenarios of LGR dehumidifiers

Basement water ingress;

The house is submerged in water (such as floods, pipe bursts, or  toilet backflow);

Floor, wall, and gypsum board absorb water;

Dry building structure (wood, concrete);

Accelerate drying before and after decoration;

 

Recommended configuration combination for flood damage

Equipment:	Purpose：
LGR dehumidifier	Absorb a large amount of water vapor from the air to accelerate the overall drying process.
Air Mover	Promote air circulation and accelerate the evaporation of moisture from floors and walls.
Air Scrubber	Remove mold spores, odors, and dust from the air.
Infrared/ Needle Hygrometer	Monitor the moisture content inside the wall and on the ground, and evaluate the drying progress.

 

Preair water damage restoration equipment