746 High Efficiency Overhead Dehumidifier by Quest, M-CoRR

The Quest 746 removes up to 730 pints of moisture per day at 1,650 CFM and 45,700 BTU on 480V power, positioned just below the 876 as one of Quest's largest overhead units for high-capacity commercial cultivation.

It shares the same patented M-CoRR multi-coil refrigeration design used across Quest's efficiency-focused lineup, recycling heat pulled from the air to reduce both energy use and the added cooling load in the room, and filters air through a MERV 13 filter rated for up to 95% particle capture.

Key Features & Benefits

• 730 pints/day capacity — at 1,650 CFM and 45,700 BTU on 480V power, one of the highest-capacity units in Quest's overhead lineup.
• Patented M-CoRR multi-coil refrigeration — reclaims heat drawn from the air during dehumidification, improving efficiency and holding down the added heat load at this unit's higher capacity.
• MERV 13 filtration — traps up to 95% of dust, mold spores, bacteria, and smoke circulating through the unit.
• 480V electrical service — matched to larger commercial facilities already running higher-voltage service.
• Overhead-mount design — built for ceiling installation in large commercial grow spaces.

Who Should Use This

The Quest 746 fits large commercial cultivation operations that need near-industrial capacity but on 480V service rather than the hard-wired 220-240V configuration of the largest 876 model.

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 746 compare to the Quest 876?

The 746 removes up to 730 pints/day at 1,650 CFM on 480V power, while the 876 removes up to 876 pints/day at 1,850 CFM on hard-wired 220-240V. Choose based on your facility's electrical service and actual moisture load rather than defaulting to the higher-numbered model.

What electrical service does the Quest 746 require?

It runs on 480V power, which is standard for larger commercial and industrial facilities. Confirm your electrical infrastructure supports 480V service before ordering, since this differs from the 208/230V or 110-120V service used by Quest's smaller overhead units.

Does M-CoRR technology scale to this unit's higher capacity?

Yes, the patented multi-coil refrigeration design recycles heat from the dehumidification process at this unit's scale the same way it does on Quest's smaller M-CoRR-equipped models, reducing both energy use and the heat load added to the room. The underlying mechanism doesn't change with unit size.

What kind of facility is the Quest 746 designed for?

It's built for large commercial cultivation operations that need near-industrial dehumidification capacity, one tier below the 876. Facilities without 480V service already available should factor in the electrical work required before choosing this unit.