Quest vs Anden Dehumidifiers: The Definitive Grow Room Comparison
Both brands dominate the commercial grow room market — here is how to choose the right one for your setup
Commercial & Home2026 ModelsBTU EfficiencySize Guide
Quest and Anden are the two brands that grow consultants recommend when price is secondary to performance. Both are designed specifically for horticultural environments (high humidity, high transpiration loads, continuous operation), and both are dramatically more efficient than consumer dehumidifiers. The differences come down to size range, form factor, and integration with grow room automation systems.
Side-by-Side: Quest 335 vs Anden A210
| Feature | Quest 335 | Anden A210 |
|---|
| Capacity | 335 pints/day | 210 pints/day |
| Power Draw | 2.6 kW | 1.8 kW |
| Efficiency | 4.0 pints/kWh | 4.3 pints/kWh |
| Best Room Size | 10×20 and up | 10×10 to 15×15 |
| Ducting | Optional (6" inlet/outlet) | Optional (6" inlet/outlet) |
| Controls | Integrated RH controller | Integrated RH controller |
| Warranty | 5 years | 5 years |
| Price | ~$2,200 | ~$1,700 |
Quest: The Industry Workhorse
Quest has been the default recommendation for commercial grows for over a decade. The 335 is their most popular large-room unit — 335 pints/day handles flowering rooms up to 600+ sq ft with heavy transpiration loads. Quest also makes the CDG series (ceiling-ducted) for rooms where floor space is at a premium. Integration with most major grow room controllers (Priva, TrolMaster, Argus) is well-supported.
⭐ BEST LARGE ROOMQuest 335 Dehumidifier
- ✓ 335 pints/day capacity
- ✓ Continuous drain or collection tank
- ✓ 5-year warranty
- ✓ Industry standard for 10×20+ rooms
~$2,200
Shop Quest →
⭐ BEST EFFICIENCYAnden A210 Dehumidifier
- ✓ 210 pints/day capacity
- ✓ 4.3 pints/kWh (best in class)
- ✓ Compact footprint
- ✓ Perfect for 10×10–15×15 rooms
~$1,700
Shop Anden → Our Verdict
Large commercial rooms (20×20+): Quest 335 or Quest 550. The brand's track record, dealer network, and high-capacity units are unmatched for big rooms.
Mid-size rooms and home grows (up to 15×15): Anden A210. Better efficiency, competitive pricing, and Anden's focus on the mid-size market makes the A210 a smarter buy if you do not need 335+ pints per day.
Frequently Asked Questions
What size dehumidifier do I need for my grow room?
A rough rule is 1 pint per day per pound of fresh plant matter at harvest. A 4×4 tent with 4 plants needs roughly 30–50 pints/day in flower. A 10×10 room with heavy plant load needs 100–150 pints/day. Always oversize by 25% — it is better to run a larger unit at lower duty cycle than a small unit running 24/7.
Is Quest or Anden better for a home grow tent?
For a typical home grow tent (4×4 or 5×5), both Quest and Anden are overkill in their commercial sizes. Quest makes the Quest 70 and Quest 105 for home growers. Anden's A55 or A70 are excellent for home tent grows. Both brands offer dramatically better reliability than consumer-grade dehumidifiers from big-box stores.
Can I duct a grow room dehumidifier outside?
Yes — both Quest and Anden units have 6" ducting ports for intake and exhaust. Ducting the warm exhaust air out of your grow room prevents the dehumidifier from heating your space. This is highly recommended in warm climates or during summer months when temperature control is critical.
How long do Quest and Anden dehumidifiers last?
Both brands are engineered for 24/7/365 commercial operation. Quest and Anden units routinely last 8–12+ years with basic maintenance (coil cleaning every 6 months). Their 5-year warranties reflect this confidence. Consumer dehumidifiers running 24/7 in humid grow environments typically fail within 2–3 years.
