Best Dehumidifier Australia 2026: Buyer's Guide, Sizing & Where to Buy
Choosing the best dehumidifier Australia has to offer can feel overwhelming—whether you’re fighting mould, drying out after a flood, or protecting a commercial site. This guide walks you through capacity, technology, and what to look for in an Australian dehumidifier, plus how to pick a unit that’s fit for our climate and local standards.
What Makes a Dehumidifier “Best” in Australia?
The best dehumidifier for Australian conditions needs to handle coastal humidity, work in unheated spaces, and meet local electrical and safety rules. Key factors: extraction rate (L/day), low-temperature performance, LGR (Low Grain Refrigerant) technology where relevant, and ASA/SAA certification so it’s legal and safe to use in Australia. Whether you need a dehumidifier for mould, water damage restoration, or a warehouse, getting these right matters more than brand name alone.
Why Australians Invest in Quality Dehumidifiers
Mould & Health
High humidity fuels mould and dust mites. A reliable dehumidifier helps keep RH in the 30–50% range, supporting respiratory health and reducing musty odours and allergens.
Water Damage & Floods
After leaks or floods, fast drying limits damage and mould. Industrial and commercial dehumidifiers are built for large volumes and 24/7 running in restoration jobs.
Comfort & Building Care
Excess moisture damages timber, plaster, and fittings. In homes, offices, and storage, a well-sized unit improves comfort and helps protect the building.
Compliance & Longevity
ASA/SAA certified units are approved for Australian supply. Choosing certified, quality builds means fewer failures and better support over the life of the unit.
Features That Define the Best Dehumidifiers in Australia
LGR (Low Grain Refrigerant) Technology
LGR dehumidifiers can extract more moisture at lower temperatures and in damper air than standard refrigerant units. That makes them a strong choice for cool, humid spots like basements, garages, and restoration sites—and a common feature in the best dehumidifier Australia recommendations for serious moisture control.
Capacity: 50L, 70L, 90L and Beyond
Capacity (L/day) should match room size and how wet things are. Small rooms and light damp: 20–30L. Medium homes and offices: 50–70L. Large areas, restoration, or commercial: 70L, 90L or higher. Sizing too low wastes time and power; too high can over-dry. Our dehumidifier range includes 50L, 70L, and 90L models to scale to your project.
Portability, Drainage & Runtime
Wheels, handles, and optional continuous drainage make placement and 24/7 use easier. For water damage and restoration, look for robust construction, simple controls, and the ability to run unattended.
ASA / SAA Certification
Units sold in Australia should be ASA or SAA approved. This confirms they meet local electrical and safety standards. When comparing the best dehumidifier Australia options, certification is non‑negotiable for both safety and warranty.
Types of Dehumidifiers Available in Australia
Refrigerant (Compressor) Dehumidifiers
Ideal for warmer, above‑10°C spaces. Most common for homes and offices. Good balance of cost, capacity, and energy use when conditions suit.
- Widely used across Australia
- Strong performance in moderate to warm, humid conditions
- Available from 50L to 90L+ per day
LGR (Low Grain Refrigerant) Dehumidifiers
Advanced refrigerant tech for better performance in cooler and very humid environments. Suits basements, restoration, and commercial jobs where standard units struggle.
- Better extraction at low temps and high RH
- Common in pro restoration and commercial use
- Often found in 50L and 70L professional units
Commercial & Industrial Dehumidifiers
Built for large areas, 24/7 operation, and tough sites. Higher capacity, durability, and sometimes ducting options. Used in restoration, warehouses, pools, and construction. Explore our commercial dehumidifier solutions for heavy‑duty applications.
- 70L–90L+ daily extraction
- Rugged build for job sites
- Ideal for water damage and industrial use
How to Size Your Dehumidifier: 50L, 70L, 90L
Picking the right capacity is one of the most important steps when buying the best dehumidifier Australia has available. Use this as a starting point:
50L Per day
Medium rooms, single-level homes, light flooding, and smaller restoration or commercial jobs. A 50L dehumidifier for mould or general damp is often enough when space and moisture levels are moderate.
70L Per day
Larger homes, multi-room drying, serious water damage, and many commercial and restoration projects. A popular choice for anyone wanting strong performance without stepping up to 90L.
90L Per day
Large areas, severe flooding, big commercial and industrial spaces, and 24/7 drying. The right option when you need maximum extraction and faster dry‑out times.
For flood and restoration work, see our water damage restoration equipment page to match dehumidifiers with air movers, air scrubbers, and thermal imaging.
Benefits of Choosing a Quality Australian Dehumidifier
Faster Drying
Correct capacity and technology cut dry-out time, which matters for both property damage and business turnaround.
Lower Mould Risk
Keeping humidity down during and after water events reduces the chance of mould taking hold.
Energy Efficiency
Well-sized, efficient units do the job without unnecessary running or oversized motors.
Durability & Support
Quality builds and local support (like Thorair’s) mean fewer breakdowns and faster help when you need it.
Where Dehumidifiers Are Used in Australia
From homes to hospitals and from flood restoration to industry, the right dehumidifier supports health, assets, and compliance.
Homes & Units
Bedrooms, bathrooms, laundries, and living areas. Helps with dehumidifier for mould and general comfort in humid regions.
Water Damage & Restoration
Floods, burst pipes, storm damage. Used with air movers and air scrubbers for structured drying and odour control.
Commercial & Industrial
Offices, warehouses, pools, gyms, cold rooms, and construction. Commercial dehumidifier and industrial units are built for larger volumes and tougher conditions.
Basements, Crawl Spaces & Storage
Cool, often unventilated areas where LGR and low‑temp performance really pay off.
Maintenance Tips for Your Dehumidifier
Clean Filters Regularly
Follow the manual. Clean or replace filters so airflow and efficiency stay high.
Empty or Drain the Tank
Use the tank for portability or plumb continuous drainage for long, unattended runs.
Place for Best Airflow
Keep the unit away from walls and furniture so air can enter and leave freely.
Service When Needed
For commercial and restoration use, plan periodic checks to keep performance and warranty valid.
Standards & Compliance: ASA, SAA, LGR
When you buy a best dehumidifier Australia option, it should meet local requirements and good practice:
- ASA (Approved for Supply in Australia) – Confirms the unit meets Australian electrical and safety standards for sale and use.
- SAA – Another mark of compliance with Australian (and often NZ) electrical standards.
- LGR – Indicates Low Grain Refrigerant technology for better low‑temperature and high‑humidity performance; not a safety mark but a useful feature for the right applications.
Best Dehumidifier Australia: Frequently Asked Questions
What is the best dehumidifier for mould in Australia?
Choose a unit with enough capacity for the room (often 50L for a medium room, 70L for larger or damper spaces), good low‑humidity performance, and optional continuous drain for 24/7 running. LGR helps in cooler areas. Ensure it is ASA/SAA certified.
How do I choose between 50L, 70L, and 90L dehumidifiers?
50L: medium rooms and light damp. 70L: larger homes, multi-room drying, and most restoration jobs. 90L: large or very wet areas, big commercial and industrial spaces. When in doubt, slightly larger is usually better for speed and flexibility.
Do I need an LGR dehumidifier?
LGR is especially useful in cooler (e.g. under 15–20°C) or very humid conditions: basements, garages, restoration, and some commercial sites. In consistently warm, moderately humid rooms, a solid refrigerant unit can be enough.
Are Thorair dehumidifiers ASA/SAA certified?
Thorair dehumidifiers are designed to meet Australian standards. Check each product page or contact us to confirm the latest certification for the model you’re interested in.
Where can I buy commercial dehumidifiers in Australia?
Thorair supplies dehumidifiers from 50L to 90L, including LGR and commercial‑grade models. We offer free delivery on orders over $2,000. For sizing and site-specific advice, call 1300 263 551 or email info@thorair.com.au.
Find the Best Dehumidifier for Your Project
Browse our range of 50L, 70L, and 90L dehumidifiers—including LGR and commercial models—all suited to Australian conditions. Free delivery on orders over $2,000. Need help choosing? Call 1300 263 551 or email info@thorair.com.au.
