# What is the most energy-efficient dehumidifier available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the most energy-efficient dehumidifier available?

## Products

### Midea MAD50PS1Q (Midea Cube 50-Pint)
```yaml
product: midea-mad50ps1q-midea-cube-50-pint
brand: Midea
price_gbp: 194.38
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
size: 14.45 in x 14.76 in x 14.57 in
capacity: 50
humidity_range: 35-85%
continuous_drain: Yes (built-in pump and gravity drain option)
water_tank_capacity: 4.2
energy_efficiency_rating: ENERGY STAR certified; IEF ~1.95 L/kWh
```

- **Price:** £194.38 [^1]
- **Summary:** The Midea Cube MAD50PS1Q is a 50-pint, ENERGY STAR certified dehumidifier with a unique nested cube design, a large 4.2-gallon water tank, and a built-in pump for continuous drainage. It's compact (about 14.45 in x 14.76 in x 14.57 in), quiet, smart-enabled, and designed for large spaces up to ~4,500 sq ft. Ideal for basements, large rooms, or anyone wanting less frequent emptying and flexible drainage options.
- **Ideal For:** Suitable for the most energy-efficient choice because it is ENERGY STAR certified with a high Integrated Energy Factor (~1.95 L/kWh) while removing 50 pints/day and using lower power than many competitors.

### Aprilaire E100
```yaml
product: aprilaire-e100
brand: Aprilaire
price_gbp: 1671.69
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
size: 15H x 14W x 26D in
capacity: 100
humidity_range: 40-80
continuous_drain: true
energy_efficiency_rating: ENERGY STAR Most Efficient (2025)
```

- **Price:** £1671.69 [^2]
- **Summary:** The Aprilaire E100 is a professional-grade whole-house dehumidifier that removes up to 100 pints (12.5 gallons) per day, is ENERGY STAR Most Efficient, and offers ducting options, a washable MERV 8 filter, and built-in digital control. It is built for durability with corrosion-resistant aluminum coils and is designed for basements, crawl spaces, or whole-home use up to about 5,500 sq. ft. It supports continuous drain installation to avoid emptying a water bucket.
- **Ideal For:** Ideal for the most energy-efficient dehumidifier search because it is recognized as ENERGY STAR Most Efficient and provides 100 pints/day removal with high energy factor ratings (e.g., 2.35-2.6 L/kWh).

### Black+Decker BDT50PWTB (50-Pint Smart)
```yaml
product: black-decker-bdt50pwtb-50-pint-smart
brand: Black+Decker
price_gbp: null
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
size: 15.75 W x 11.61 D x 24.80 H in
capacity: 50
humidity_range: 35-80%
continuous_drain: true
water_tank_capacity: 1.79
energy_efficiency_rating: ENERGY STAR certified
```

- **Price:** £None [^3]
- **Summary:** Wi‑Fi enabled 50‑pint dehumidifier with built‑in pump and caster wheels; removes up to 50 pints per 24 hours, has a 14.3‑pint (1.79 gallon) tank, continuous drain options and adjustable humidistat (35-80%). Suited for large rooms/basements up to ~4,500 sq ft that need automated or remote control and continuous drainage.
- **Ideal For:** Best for energy‑efficient needs because it is ENERGY STAR certified while providing 50 pints/day removal and a 14.3‑pint tank with built‑in pump for continuous drain.

### Frigidaire FHDD2234 (22-Pint with Wi-Fi)
```yaml
product: frigidaire-fhdd2234-22-pint-with-wi-fi
brand: Frigidaire
price_gbp: 163.73
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
size: Width 15.9 in, Height 19.8 in, Depth 11.1 in
capacity: 22
humidity_range: 35 - 85
continuous_drain: true
water_tank_capacity: 1.7
energy_efficiency_rating: Integrated Energy Factor 1.7 L/kWh, ENERGY STAR Certified
```

- **Price:** £163.73 [^4]
- **Summary:** The Frigidaire FHDD2234W1 is a 22-pint Energy Star certified portable dehumidifier with built-in Wi‑Fi, three fan speeds, and continuous drain capability. It includes a 1.7-gallon bucket, digital humidity readout, low-temperature operation to 41°F, and app/Alexa/Google Home control, suited for small to medium rooms needing remote monitoring.
- **Ideal For:** Ideal for energy-efficient small-room dehumidification because it is ENERGY STAR certified and has an Integrated Energy Factor of 1.7 L/kWh while removing 22 pints/day.

### Midea MAD35S1QWT (35-Pint Cube)
```yaml
product: midea-mad35s1qwt-35-pint-cube
brand: Midea
price_gbp: 194.35
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
size: 14.57 in x 14.76 in x 14.45 in
capacity: 35
continuous_drain: true
energy_efficiency_rating: ENERGY STAR® Most Efficient
```

- **Price:** £194.35 [^5]
- **Summary:** Compact 35‑pint cube dehumidifier for spaces up to ~3,500 sq ft with Wi‑Fi smart control, lift‑and‑twist nested/extended tank design, caster wheels, and continuous‑drain option. ENERGY STAR certified and marketed for quieter operation and larger water capacity versus traditional designs, suitable for basements and large rooms.
- **Ideal For:** Ideal for energy‑efficient dehumidification because it is ENERGY STAR® Most Efficient and removes 35 pints/day while supporting continuous drain and smart control features, lowering operating energy per pint.

### TCL 50-Pint Dehumidifier (model varies)
```yaml
product: tcl-50-pint-dehumidifier-model-varies
brand: TCL
price_gbp: 193.64
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
size: null
capacity: 50
humidity_range: 30-80
continuous_drain: true
water_tank_capacity: 0.94
energy_efficiency_rating: ENERGY STAR; Integrated energy factor 2.01 liters/kWh
```

- **Price:** £193.64 [^6]
- **Summary:** A smart 50-pint portable dehumidifier with Wi‑Fi, optional internal pump, continuous drain and Energy Star certified efficiency (integrated energy factor 2.01 L/kWh). Designed for large spaces and basements, it includes a 15‑pint internal tank, washable filter, auto‑defrost and app/voice control for remote operation. Suits users who need high-capacity, energy-efficient moisture control with smart features.
- **Ideal For:** Ideal for energy-efficiency seekers because it is ENERGY STAR certified with an integrated energy factor of 2.01 liters/kWh and ENERGY STAR Most Efficient recognition.

---
## References & Sources
[^1]: Lowe's, accessed 2026-06-12. https://www.lowes.com/pd/Midea-Midea-Cube-50-Pint-Dehumidifier-with-Pump/5013221025
[^2]: National Allergy, accessed 2026-06-12. https://www.natlallergy.com/aprilaire-e100-100-pint-energy-star-whole-house-dehumidifier.html
[^3]: BLACK+DECKER Product Help (spec page), accessed 2026-06-12. https://bdachelp.zendesk.com/hc/en-us/articles/4409015792155-BDT50WTB-50-Pint-Portable-Dehumidifier
[^4]: Total Home Supply, accessed 2026-06-12. https://www.totalhomesupply.com/p/frigidaire-fhdd2234w1-22-pint-dehumidifier-with-built-in-wifi-energy-star-r32
[^5]: Sylvane, accessed 2026-06-12. https://www.sylvane.com/products/midea-mad35s1qwt-35-pint-cube-dehumidifier
[^6]: Walmart, accessed 2026-06-12. https://www.walmart.com/ip/TCL-50-pt-4-500-sq-ft-Smart-Dehumidifier-Black-Energy-Star-2024-Works-with-Alexa-Google-Assistant-with-Pump/11953368246