Dehumidification
Dehumidification is the process of lowering the amount of moisture in the air (relative humidity) using equipment such as dehumidifiers. It helps prevent mould, protect buildings and contents, improve comfort and speed drying after water damage. In Australia, dehumidification is used in homes, basements, offices, water damage restoration, pools and industry. Thorair supplies dehumidifiers in 50L, 70L and 90L per day for home, restoration and commercial use. This guide explains how dehumidification works, which capacity to choose within the 50–90L range—including LGR and commercial dehumidifiers—and where to buy in Australia.
Why Dehumidification Matters
Mould prevention
Mould grows when relative humidity stays high (often above 60%). Dehumidification brings indoor humidity down to 45–55% or lower so mould struggles to grow. That helps in damp homes, basements and after floods or leaks.
Property and contents protection
Excess moisture warps timber, blisters paint, damages plasterboard and ruins stored goods. Controlling humidity protects structure, joinery, flooring and inventory in domestic, commercial and industrial settings.
Comfort and air quality
High humidity makes indoor air feel heavy and can worsen musty smells and condensation. Dehumidification improves comfort and supports better air quality, especially in humid coastal and subtropical parts of Australia.
Faster drying after water damage
After floods, burst pipes or leaks, dehumidification is central to water damage restoration. 50–90L dehumidifiers remove moisture from the air so wet materials can release water and dry quickly, limiting mould and structural damage.
How Dehumidification Works
Moisture in the air
Air holds water vapour. Relative humidity (RH) is how much moisture the air holds compared with the maximum it could hold at that temperature. When RH is high, surfaces can feel damp, windows steam up and mould can grow. Dehumidifiers reduce RH by removing water from the air and collecting or draining it.
Refrigerant (compressor) dehumidifiers
Most dehumidifiers cool the incoming air so water condenses on cold coils, then drips into a tank or drain. The dried air is warmed and returned to the room. They work best in warmer, humid conditions (often 18°C and above). Standard refrigerant units are less effective in cool, damp spaces.
LGR (low-grain refrigerant) dehumidification
LGR dehumidifiers use a refrigerant system that performs better in cool, damp conditions—typical after floods and in basements. They remove more moisture per hour at lower temperatures than standard refrigerant units, so LGR dehumidification is widely used in restoration, building drying and cool, humid climates. Thorair’s LGR range includes 50L, 70L and 90L per day.
Desiccant dehumidification
Desiccant units absorb moisture into a rotating wheel, then dry it with heat. They work in cold and very low-humidity conditions where refrigerant models are less effective—cold storage, unheated sheds, some industrial applications. Desiccant dehumidification can achieve very low RH in cold environments. For standard and LGR dehumidification in the 50–90L range, see Thorair’s dehumidifiers.
Capacity: 50L, 70L and 90L per day
Thorair’s dehumidifiers are rated at 50L, 70L and 90L of water removed per day. Choose 50L for smaller spaces and single-zone drying; 70L for medium homes, basements and restoration; 90L for large spaces, whole-house restoration and commercial use. For very large or complex jobs, use multiple units in the 50–90L range. Match capacity to room or building volume, how wet the space is and the temperature. Undersized equipment slows drying and raises mould risk.
Types of Dehumidification Systems (50–90L)
50L and 70L for home and smaller spaces
50L and 70L dehumidifiers suit homes, smaller basements, single-zone or 2–4 room drying, and light commercial use. Use a 50L for a single damp area or small basement; 70L for larger homes or when you need faster drying. LGR models in this range work well in cool, damp conditions. Tank or continuous drain.
- 50L: single zones, small basements, caravans, localised damp
- 70L: larger homes, medium basements, 2–4 room restoration
- LGR available for cool, damp conditions
- Check ASA/SAA for Australian use
70L and 90L for restoration and commercial
70L and 90L dehumidifiers suit restoration, large basements, whole-house drying, offices, pools and commercial buildings. Use 70L for medium restoration and commercial; 90L for larger spaces and heavy water damage. LGR models are standard in cool, damp restoration and basements. Continuous drain and 24/7 operation typical.
- 70L: medium restoration, large basements, small commercial
- 90L: whole-house restoration, pools, large commercial
- LGR for cool, damp; continuous drain standard
- Commercial dehumidifiers at Thorair
Multiple 50–90L units for large jobs
For whole buildings, heavy restoration or very large commercial spaces, use several dehumidifiers in the 50–90L range. Two 50L or 70L units, or a 90L plus a 50L or 70L, can cover more area and speed drying. Pair with air movers for system drying.
- Combine 50L, 70L and 90L to match the job
- Used with air movers in restoration
- Size total capacity to space and water load
Fixed and whole-building systems
Ducted or integrated systems for whole buildings, pools or large commercial spaces. Require design and installation. For portable 50–90L dehumidifiers for home, restoration and commercial use, see Thorair’s range.
- Whole-building or zone control
- Needs professional design and fit-out
- For pools, large commercial, some industrial
Dehumidification by Application (50–90L)
Home dehumidification
A 50L or 70L dehumidifier suits most homes for mould prevention, condensation and comfort. Use 50L for smaller homes or single problem areas; 70L for larger or very humid homes. In humid regions, run during wet seasons or year-round in damp spots. LGR models help in cooler, damper homes.
- 50L or 70L for most homes
- Target 45–55% RH for mould prevention
- Shop 50L and 70L dehumidifiers
Basement and underground dehumidification
Basements and subfloors are often cool and humid. Use 50L for smaller basements; 70L or 90L for larger ones. LGR models are better suited than standard refrigerant in cool, damp conditions. Use continuous drain and run consistently to keep humidity down and prevent mould.
- 50L for small; 70L or 90L for larger basements
- LGR preferred for cool, damp
- Drain hose and 24/7 running typical
Water damage restoration
Restoration after floods, leaks and burst pipes uses 50–90L dehumidifiers with air movers and often air scrubbers. Use 50L or 70L for smaller or single-zone jobs; 70L or 90L for whole-house or large commercial. LGR is standard for cool, damp conditions. Match capacity to water load and space; use multiple 50–90L units when needed.
- 50L, 70L and 90L for all restoration scales
- Used with air movers for system drying
- LGR for cool, damp and post-flood
Commercial and industrial dehumidification
Offices, warehouses, pools, strata common areas and larger buildings need 70L or 90L units, or multiple 50–90L dehumidifiers. Commercial and industrial models in the 50–90L range run 24/7 with continuous drain. LGR suits cool, damp commercial spaces.
- 70L or 90L for many commercial applications
- Multiple 50–90L units for very large buildings
- Thorair supplies 50L, 70L and 90L commercial options
Sizing Dehumidification: 50L, 70L or 90L?
Thorair’s dehumidifiers are 50L, 70L and 90L per day. Match the model to your space size, how wet it is and the temperature. For very large or heavy jobs, use multiple units in the 50–90L range.
For single rooms, smaller basements, caravans, localised damp and one-zone restoration. A 50L unit is often enough. Use multiple 50L units for several zones or larger areas. LGR available for cool, damp conditions.
For larger homes, basements, 2–4 room restoration, and small commercial. A 70L dehumidifier suits many homes and restoration jobs. Use with air movers in restoration. LGR preferred in cool, damp or post–water-damage. View 70L dehumidifiers.
For whole-house restoration, large basements, pools, warehouses and commercial buildings. A 90L unit or multiple 50–90L units for very large spaces. Continuous drain, 24/7 operation. Commercial and industrial 50–90L options at Thorair.
Benefits of Dehumidification
Mould and mildew control
Keeping RH at 45–55% or lower removes the conditions mould needs to grow. That helps prevent new mould and limits regrowth after remediation. 50–90L dehumidifiers deliver the capacity needed for most homes and commercial spaces.
Faster drying
In restoration and after leaks, 50–90L dehumidification shortens dry times, reduces disruption and helps meet insurance and project timelines. Match 50L, 70L or 90L to the job.
Asset and structure protection
Controlled humidity helps protect timber, flooring, joinery, stored goods and equipment from warping, rust and decay. 50–90L capacity suits domestic, commercial and industrial applications.
Comfort and odour reduction
Lower humidity can reduce musty smells, condensation and that "heavy" feeling in the air, especially in humid Australian climates. 50L and 70L models suit most homes.
Documentation for insurance
In restoration, dehumidification with 50–90L equipment supports moisture logs and drying reports that insurers and assessors expect. Thorair’s range is built for professional use.
LGR Dehumidification (50–90L)
What is LGR?
LGR (low-grain refrigerant) refers to a dehumidifier design that removes more moisture in cool, damp conditions than standard refrigerant units. At lower temperatures and in high humidity—common after floods, in basements and in southern Australia—LGR dehumidification delivers higher extraction per hour, so drying is faster and mould risk is reduced. Thorair’s LGR models are available in 50L, 70L and 90L per day.
When to use LGR dehumidification
Choose LGR when the space is cool (e.g. 10–18°C) and damp, or when you need reliable performance in variable conditions. That includes water damage restoration, basements, cool warehouses, and many commercial and strata applications. Thorair’s 50–90L LGR range suits these uses. In warm, humid rooms (18°C+), a well-sized standard refrigerant or LGR unit in the 50–90L range can both work; LGR adds a safety margin in marginal temperatures.
LGR at Thorair
Thorair’s dehumidifier range includes LGR models in 50L, 70L and 90L per day, plus commercial dehumidifiers for restoration and building drying. All suitable units are ASA/SAA approved for use in Australia.
Dehumidification vs Ventilation
Different roles
Ventilation (opening windows, exhaust fans, HVAC) exchanges indoor and outdoor air. It can lower humidity when outdoor air is drier, but in humid weather it can bring more moisture in. Dehumidification removes moisture from the air without relying on outdoor conditions. Use 50–90L dehumidifiers when you need to lower RH regardless of outside humidity, or in sealed or basement spaces where ventilation is limited. In restoration, dehumidification is essential; ventilation can support it when outdoor air is dry enough.
Dehumidification and Mould
Target humidity to prevent mould
For mould prevention, aim for 45–55% relative humidity indoors; under 50% is often recommended in previously affected or high-risk areas. Use the unit’s humidistat and a separate hygrometer to monitor. A 50L, 70L or 90L dehumidifier, correctly sized for the space, can hold these levels. Run until humidity is stable, then as needed to maintain the target.
During and after mould remediation
Dehumidification supports mould cleanup by keeping the air and surfaces drier, so spores are less likely to spread and regrowth is discouraged. It does not replace cleaning or removal of mould on surfaces. Pair 50–90L dehumidification with proper remediation; for spores in the air, add HEPA filtration (e.g. air scrubbers) where appropriate.
Maintenance and Running Dehumidifiers
Use continuous drain where possible
For restoration and commercial use, connect a hose to a drain or sump so the unit can run 24/7 without emptying a tank. 50–90L Thorair units support continuous drain. Ensure the hose is secure and the drain can handle the flow.
Clean filters and coils
Keep filters and coils free of dust so airflow and performance stay high. Follow the manufacturer’s schedule; in dusty or restoration environments, check more often.
Set and hold the right humidity
For mould prevention, set the humidistat to 45–50% or as advised. Use a hygrometer in problem rooms to confirm. A correctly sized 50L, 70L or 90L unit can maintain these levels in its coverage area.
Pair with air movers in restoration
Dehumidifiers dry the air; air movers increase evaporation from surfaces. Use both for system drying. Match 50–90L dehumidifier capacity and number of air movers to the job.
Position for airflow
Keep inlets and outlets clear. In large rooms, central placement or multiple 50–90L units improve coverage. For ducting, follow the manufacturer’s or designer’s instructions.
Australian Standards: ASA/SAA Dehumidifiers
Dehumidifiers used in Australian buildings must meet local electrical and safety standards. Thorair’s 50L, 70L and 90L dehumidifiers and commercial dehumidifiers include ASA/SAA-approved LGR and standard models for home, restoration and commercial use.
- Check for ASA or SAA compliance on the unit or product listing.
- Restoration and commercial work often require documented use of compliant equipment.
- Verify voltage and plug type (e.g. 240V) for Australian supply.
Where Dehumidification Is Used (50–90L)
Homes and apartments
50L or 70L for mould prevention, condensation and comfort. Target 45–55% RH. Run in damp rooms or for whole-home control in humid regions.
Basements and subfloors
50L for smaller basements; 70L or 90L for larger. LGR for cool, damp. Run 24/7 with continuous drain in many cases.
Water damage restoration
50–90L with air movers. Restoration uses 50L, 70L or 90L depending on space and water load. LGR standard in cool, damp. Use multiple 50–90L units for large jobs.
Offices and retail
70L or 90L for large areas, server rooms and under raised floors. Run during and after remediation. Multiple 50–90L units for bigger buildings.
Pools and aquatic facilities
70L or 90L for pool halls and change rooms. High moisture loads; commercial 50–90L units, often 24/7, to protect structure and control condensation.
Strata and common areas
50–90L commercial units with continuous drain. 70L or 90L for basements, plant rooms and laundries. LGR where spaces are cool and damp.
Warehouses and manufacturing
Industrial 50–90L dehumidifiers for product, equipment and inventory. 70L or 90L or multiple 50–90L units. LGR or standard depending on temperature.
Schools and healthcare
50–90L for classrooms, labs, storage and clinical areas. 70L or 90L for larger zones. Commercial-grade with documented performance.
Why Choose Thorair for Dehumidification in Australia
50L, 70L and 90L range
Thorair supplies dehumidifiers in 50L, 70L and 90L per day for home, commercial and industrial use. LGR and standard models for restoration, basements, pools and buildings. Shop the 50–90L range.
Restoration and moisture expertise
We supply 50–90L dehumidifiers, air movers, air scrubbers and restoration equipment. Our team can help you choose 50L, 70L or 90L and LGR vs standard for your application.
ASA/SAA and Australian use
50–90L dehumidifiers suited to Australian conditions and electrical standards. Contact 1300 263 551 or info@thorair.com.au for product details, sizing and orders.
Free delivery over $2,000
Free delivery on orders over $2,000. Shop 50L, 70L and 90L dehumidifiers or combine with air movers and restoration gear for larger jobs.
Related: Air Scrubbers and Restoration
For mould and water damage restoration, 50–90L dehumidification is used with air movers (to speed evaporation) and HEPA air scrubbers (to capture spores and fine dust). Thorair supplies 50L, 70L and 90L dehumidifiers, air movers, air scrubbers and restoration equipment for domestic and commercial use across Australia.
Dehumidification: Frequently Asked Questions
What is dehumidification?
Dehumidification is lowering the amount of moisture in the air (relative humidity) using equipment such as dehumidifiers. It helps prevent mould, protect property, improve comfort and dry buildings after water damage. Thorair’s dehumidifiers are 50L, 70L and 90L per day for home, restoration and commercial use.
What humidity level for mould prevention?
Aim for 45–55% relative humidity indoors; under 50% in damp or previously affected areas. Use a humidistat and a hygrometer to monitor. A correctly sized 50L, 70L or 90L dehumidifier can hold these levels. Run until stable, then as needed.
What is LGR dehumidification?
LGR (low-grain refrigerant) dehumidifiers remove more moisture in cool, damp conditions than standard refrigerant units. They are widely used in restoration, basements and commercial buildings. Thorair’s LGR models are available in 50L, 70L and 90L per day. View the range.
Dehumidification vs ventilation?
Ventilation exchanges indoor and outdoor air; it can raise or lower humidity depending on outside conditions. Dehumidification removes moisture from the air regardless of outside weather. Use 50–90L dehumidifiers when you need to control RH in sealed spaces, basements or humid climates; use ventilation when outdoor air helps.
How do I choose between 50L, 70L and 90L?
Use 50L for smaller spaces, single zones and small basements. Use 70L for larger homes, medium basements and 2–4 room restoration. Use 90L for whole-house restoration, large commercial spaces, pools and heavy water damage. For very large buildings, use multiple 50–90L units. Commercial and industrial 50–90L options at Thorair.
When to use desiccant dehumidification?
Desiccant units work in cold and very low-humidity, cold environments—cold storage, unheated sheds, some industrial uses. When refrigerant and LGR are less effective in cold conditions, desiccant is an option. For standard and LGR dehumidification in 50–90L, see Thorair’s dehumidifiers.
Where is dehumidification used in Australia?
Homes, basements, offices, water damage restoration, pools, strata, warehouses and manufacturing. 50L and 70L for most homes and small commercial; 70L and 90L for restoration and commercial. Thorair supplies 50–90L dehumidifiers across Australia.
Where can I buy 50–90L dehumidification equipment in Australia?
Thorair sells 50L, 70L and 90L dehumidifiers, commercial dehumidifiers and industrial options in the 50–90L range. Browse online or contact 1300 263 551 or info@thorair.com.au. Free delivery on orders over $2,000.
50–90L Dehumidification Equipment at Thorair
LGR and commercial dehumidifiers in 50L, 70L and 90L per day for restoration, basements and buildings. Shop 50–90L dehumidifiers or speak to our team on 1300 263 551 or info@thorair.com.au. Free delivery on orders over $2,000.
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