335 High Efficiency Overhead Dehumidifier by Quest - 208/230V

The Quest 335 removes up to 345 pints of moisture per day at 900 CFM and 21,800 BTU, sitting between the 225 and 506 in Quest's overhead commercial dehumidifier lineup. It uses the patented M-CoRR multi-coil refrigeration design, recycling heat pulled from the air during dehumidification to improve energy efficiency and limit added heat load in the grow room.

This 208/230V configuration is sized for facilities running standard commercial three-phase or split-phase electrical service at that voltage.

Key Features & Benefits

• 345 pints/day capacity — at 900 CFM and 21,800 BTU, a high-capacity step above Quest's 225 model.
• Patented M-CoRR multi-coil refrigeration — recycles heat pulled from the air during dehumidification, cutting energy use and limiting the added heat load in the grow room.
• MERV 13 filtration — blocks up to 95% of dust, mold spores, bacteria, and smoke passing through the filter.
• Overhead-mount design — keeps floor space clear in large commercial grow rooms.
• Voltage-matched electrical service — available in the voltage configuration that matches your facility's existing electrical infrastructure.

Who Should Use This

The Quest 335 fits large commercial cultivation operations needing high-capacity overhead dehumidification with M-CoRR energy efficiency, sized between Quest's mid-range 225 and its largest 506 and 746 units.

About Quest

Quest is a Therma-Stor brand. It focuses on commercial dehumidification. Therma-Stor is headquartered in Madison, Wisconsin. It's the same parent company behind the Anden brand. Therma-Stor has built dehumidifiers and environmental-control equipment for decades. Quest specifically targets commercial and industrial moisture control. Think indoor cultivation, food production, and commercial buildings. That's a different focus than residential basement units. Many overhead models use the company's patented M-CoRR design. M-CoRR stands for multi-coil refrigeration. The design recycles heat pulled from the air. That happens during dehumidification itself. It improves energy efficiency as a result. It also cuts heat sent back into the room.

Frequently Asked Questions

How does the 335 compare to the Quest 225 and 506?

The 335 removes up to 345 pints/day, above the 225's 225 pints/day but below the 506's 500 pints/day, positioning it as a mid-to-large capacity choice. Match your selection to your room's actual moisture load rather than choosing based on model number alone.

What does the MERV 13 filter on the 335 capture?

It removes up to 95% of dust, mold spores, bacteria, and smoke as air passes through the 335. Replace it on the manufacturer's recommended schedule to maintain the unit's rated airflow and filtration performance.

Does M-CoRR technology work the same way on the 335 as on smaller Quest units?

Yes, the patented multi-coil refrigeration design recycles heat from the dehumidification process at this unit's capacity the same way it does across Quest's other M-CoRR-equipped models, improving energy efficiency and reducing added room heat load. The mechanism is consistent across the lineup regardless of unit size.

What electrical service does the 208/230V version require?

It's built for standard 208/230V commercial electrical service. Confirm this matches your facility's existing infrastructure before ordering, since Quest also offers this same 335 model in a 277V configuration for facilities wired differently.