Desiccant vs Compressor Dehumidifier
Written by the Dehumidifier for Basement editorial team and reviewed for source accuracy. — last updated July 2026. Editorial policy · Report an error
Quick answer
Compressor dehumidifiers remove far more water per day (up to 50+ pints under the 2019 DOE standard) and suit basements 65°F and up. Desiccant units remove less water but work below 41°F, run quieter per manufacturer claims, and don't use a compressor that can freeze.
This is a spec-based comparison — we have not lab-tested these units; specs are from manufacturers and Energy Star.
What's the difference between desiccant and compressor dehumidifiers?
Compressor (refrigerant) dehumidifiers cool air across coils to condense moisture, similar to an air conditioner. Desiccant dehumidifiers pull air across a moisture-absorbing material (like silica gel) that is then dried out by a heater. This is a mechanical difference stated in manufacturer literature, not a performance claim from testing.
How do capacity and wattage compare?
| Type | Model | Capacity | Watts | Noise | Min. operating temp |
|---|---|---|---|---|---|
| Compressor | Frigidaire FFAD5033W1 | 50 pint (2019 DOE) | 480W | 50 dBA | ~65°F per manual |
| Compressor | Honeywell TP70WKN | 70 pint (2019 DOE) | 745W | 53 dBA | ~65°F per manual |
| Desiccant | EcoSeer Compact Desiccant | ~10–16 oz/day (mfr claim) | 180W | 38 dBA (mfr claim) | Below 41°F rated |
Source: Manufacturer spec sheets and manuals
Frigidaire FFAD5033W1
- Manufacturer
- Frigidaire
- Model number
- FFAD5033W1
- Rated capacity
- 50 pint (current DOE test procedure)
- ENERGY STAR
- Listed as ENERGY STAR certified on the ENERGY STAR product finder
- Integrated Energy Factor
- Not published by the manufacturer.
- Power draw
- 480 W (manufacturer specification)
- Operating temperature
- 41°F–95°F (manufacturer specification)
- Drainage methods
- Bucket or gravity hose
- Built-in pump
- No
- Dimensions
- Not published by the manufacturer.
- Weight
- Not published by the manufacturer.
- Warranty
- Not published by the manufacturer.
- Manufacturer-stated coverage
- Up to 4,500 sq ft (manufacturer claim)
- Noise
- 50 dBA (manufacturer claim)
- Price range
- $220–$250 (subject to change)
- Availability
- Widely available
Strengths (from published specs)
- Energy Star certified
- Full-tank alert and auto shutoff per spec sheet
- Lower listed price than the pump model
Limitations (from published specs)
- No built-in condensate pump — gravity drain only
- Manual bucket empties every 12+ hours in high humidity
Affiliate link — we may earn a commission at no extra cost to you. Price subject to change. Specification source: Frigidaire. Last verified 2026-07-29.
Honeywell TP70WKN
- Manufacturer
- Honeywell (JMATEK/AirTek licensee)
- Model number
- TP70WKN
- Rated capacity
- 70 pint (current DOE test procedure)
- ENERGY STAR
- Listed as ENERGY STAR certified on the ENERGY STAR product finder
- Integrated Energy Factor
- Not published by the manufacturer.
- Power draw
- 745 W (manufacturer specification)
- Operating temperature
- 41°F–95°F (manufacturer specification)
- Drainage methods
- Bucket, gravity hose, or built-in pump
- Built-in pump
- Yes — built-in pump
- Dimensions
- Not published by the manufacturer.
- Weight
- Not published by the manufacturer.
- Warranty
- Not published by the manufacturer.
- Manufacturer-stated coverage
- Up to 4,000 sq ft in higher-moisture spaces (manufacturer claim)
- Noise
- 53 dBA (manufacturer claim)
- Price range
- $300–$340 (subject to change)
- Availability
- Widely available
Strengths (from published specs)
- Energy Star certified at the higher 70-pint tier
- Built-in pump per manufacturer listing
- Larger rated capacity for extremely damp basements
Limitations (from published specs)
- 745W draw raises monthly running cost versus 50-pint units
- 53 dBA is on the louder end of Energy Star listings
Affiliate link — we may earn a commission at no extra cost to you. Price subject to change. Specification source: Honeywell (JMATEK/AirTek licensee). Last verified 2026-07-29.
EcoSeer Compact Desiccant Dehumidifier
- Manufacturer
- EcoSeer
- Model number
- Not published by the manufacturer.
- Rated capacity
- Manufacturer states a daily removal figure in ounces, not AHAM/DOE pints
- ENERGY STAR
- Not found on the ENERGY STAR product finder at last check
- Integrated Energy Factor
- Not published by the manufacturer.
- Power draw
- 180 W (manufacturer claim)
- Operating temperature
- Rated for operation below 41°F (manufacturer claim)
- Drainage methods
- Internal tank; continuous drain on some variants
- Built-in pump
- No
- Dimensions
- Not published by the manufacturer.
- Weight
- Not published by the manufacturer.
- Warranty
- Not published by the manufacturer.
- Manufacturer-stated coverage
- Up to 1,100 sq ft (manufacturer claim)
- Noise
- 38 dBA (manufacturer claim)
- Price range
- $100–$140 (subject to change)
- Availability
- Unverified
Strengths (from published specs)
- Rated to operate below 41°F, unlike most compressor units per spec sheet
- 38 dBA manufacturer noise claim is far below compressor units
- No compressor to freeze in cold basements
Limitations (from published specs)
- Very low daily moisture removal versus compressor 50-pint units
- Not Energy Star certified
- Higher energy cost per pint of water removed based on wattage-to-capacity ratio
Affiliate link — we may earn a commission at no extra cost to you. Price subject to change. Specification source: EcoSeer. Last verified 2026-07-29.
Why does a compressor dehumidifier freeze up in cold basements?
Compressor units cool coils below the surrounding air temperature; in cold basements this can drop the coil below freezing and form frost. Desiccant units have no cold coil, so they don't have this failure mode. See dehumidifier freezing up.
Which type costs more to run per pint of water removed?
Based on wattage-to-capacity ratios in manufacturer specs, desiccant units generally use more energy per pint of water removed than compressor units, since they draw meaningful wattage (180W) while removing far less water daily than a 480–745W compressor unit removing tens of pints.
When should I choose desiccant over compressor?
- Choose desiccant if your basement regularly runs below 41–65°F, per compressor manuals' minimum operating temperature
- Choose desiccant for small spaces where its lower listed capacity is sufficient
- Choose compressor for standard basements above 65°F needing 30+ pints/day
- Choose compressor if you need Energy Star certification, since desiccant units are less commonly listed
Buying checklist: desiccant vs compressor
- Check your basement's typical winter temperature
- Estimate square footage and dampness level using AHAM guidance
- Compare rated water removal per day between types — units are not the same in the same price range
- Check noise rating if the space is used as a living area
- Confirm Energy Star status if efficiency verification matters to you
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Frequently asked questions
Can a desiccant dehumidifier replace a compressor unit in a basement?+
Only for small spaces or cold basements below the compressor's minimum operating temperature; desiccant units generally remove far less water per day per manufacturer specs.
Do desiccant dehumidifiers use a lot of electricity?+
The EcoSeer Compact lists 180W, lower in absolute terms than a 480W compressor unit, but per pint of water removed it's typically less efficient based on the wattage-to-capacity ratio.
Are desiccant dehumidifiers Energy Star certified?+
Fewer desiccant models appear on the Energy Star product finder compared to compressor units; always check the current EPA listing.
Why don't desiccant dehumidifiers freeze up?+
They don't use a cold refrigerant coil, so there's no cold surface for frost to form on, per how the technology works.
Which is quieter, desiccant or compressor?+
Manufacturer claims put desiccant units around 38 dBA versus 50–53 dBA for compressor units in this comparison, partly due to the lack of a compressor motor.
Keep reading
Sources and methodology
Guidance on this page is drawn from federal agencies and industry standards bodies rather than our own laboratory testing. We do not test appliances in a laboratory and we do not publish product measurements we did not obtain from the manufacturer or a government listing.
- U.S. Environmental Protection Agency — Mold Course & moisture control guidance (keep indoor relative humidity 30–50%)Used for: Target indoor relative humidity range and mold-growth conditions. Last verified 2026-07-29.
- U.S. Department of Energy — Energy Conservation Standards and Test Procedure for DehumidifiersUsed for: Why capacity ratings changed: the current federal test procedure and its rating conditions. Last verified 2026-07-29.
- ENERGY STAR (EPA) — ENERGY STAR Certified Dehumidifiers product finderUsed for: Certification status, Integrated Energy Factor (IEF) values, and sizing guidance for dehumidifiers. Last verified 2026-07-29.
- Association of Home Appliance Manufacturers (AHAM) — Dehumidifier certification program and sizing guidanceUsed for: Capacity-by-condition sizing ranges and certified capacity verification. Last verified 2026-07-29.
- U.S. Energy Information Administration — Electric Power Monthly — average retail price of electricity, residential sectorUsed for: Default electricity rate used in operating-cost estimates. Last verified 2026-07-29.
Written by the Dehumidifier for Basement editorial team and reviewed for source accuracy. Last updated July 2026. Found an error? Report it through our corrections policy.