Bry-Air MiniPAC MP-175 Desiccant Dehumidifier – 175 CFM, 5.8 lbs/hr, 208–240V

The Bry-Air MiniPAC MP-175 is a 175 CFM desiccant dehumidifier for low-humidity control below the operating limits of refrigerant and LGR equipment — removes 5.8 lbs of moisture per hour at 70°F and continues operating below freezing where refrigerant compressors fail. 208–240V single-phase. Specified for cold storage staging, pharmaceutical processing, laboratories, and post-flood structural drying in cold climates.

MP-175 MiniPAC Desiccant Dehumidifier — 175 CFM Low-Humidity Control Below Refrigerant Operating Limits

The Bry-Air MiniPAC MP-175 is a 175 CFM desiccant dehumidifier built for environments where refrigerant or LGR equipment fails to deliver: cold storage staging areas, pharmaceutical processing rooms, laboratories holding relative humidity below 30% RH, and any space where continuous moisture removal at low ambient temperatures is required. At 5.8 lbs/hr moisture removal and 158 lbs, the MP-175 bridges the gap between the entry-level MP-100 and larger three-phase desiccant units — providing meaningful capacity uplift while remaining on single-phase 208–240V power that most facilities already have available.

MP-175 Desiccant Wheel Technology and Safety Systems

The MP-175 uses a rotating desiccant wheel rather than a compressor and refrigerant circuit. Process air (175 CFM) passes through the desiccant rotor where moisture is adsorbed into the hygroscopic matrix. The rotor continuously rotates into the reactivation sector where heated reactivation air (58 CFM) drives absorbed moisture out and exhausts it away from the process airstream. No compressor, no evaporator coil, no icing threshold — the unit delivers consistent moisture removal at temperatures where LGR equipment shuts down or enters continuous defrost.

• 175 CFM process airflow at 0.60" wc external static — sized for medium laboratories, pharmaceutical packaging rooms, and cold storage ante-areas
• 5.8 lbs/hr moisture removal — consistent extraction rate independent of ambient temperature, unlike refrigerant units whose capacity degrades as temperature drops
• Water-washable desiccant rotor with stainless steel flange — rotor can be rinsed in the field without chemical cleaning agents; stainless flange resists corrosion in high-humidity intake conditions
• Insulated airflow sectors — physically separate process and reactivation airstreams, preventing humid exhaust from re-entering the dry process air path
• Differential air pressure switch — monitors airflow continuously; triggers alarm or controlled shutdown if filter blockage or fan failure reduces flow below operating threshold
• Safety thermostat — protects the reactivation heater element from overtemperature during continuous-duty operation
• Reactivation cooldown sequence — cools the heater before full shutdown, extending heater element life in 24/7 installations
• Auto/manual operating modes — auto mode for humidistat-controlled cycling; manual for scheduled or fixed-rate drying operations
• Multiple mounting configurations — floor-standing, wall-mounted, or duct-inline installation for space-constrained mechanical rooms

MP-175 Applications and Environments

Pharmaceutical manufacturers use the MP-175 in tablet coating and packaging areas where moisture above 30% RH causes active ingredient degradation, coating defects, and shortened shelf life. Analytical chemistry laboratories and materials testing facilities deploy it to maintain stable low-humidity conditions for hygroscopic samples and precision calibration equipment that cannot tolerate humidity fluctuations. Cold storage operators use the MP-175 in staging areas and ante-chambers adjacent to freezer vaults, where low ambient temperatures render refrigerant dehumidifiers ineffective. Electronics assembly cells and military depot storage facilities specify desiccant units in component storage areas to prevent corrosion on circuit boards, connectors, and optical assemblies. Archival document storage, museum collections, and seed banks use the MP-175 for continuous moisture control where a refrigerant unit cannot reach or sustain the required humidity floor.

Desiccant vs. Refrigerant: Technology Selection Criteria

Refrigerant dehumidifiers — including LGR units — remove moisture by cooling process air below its dew point onto evaporator coils. As ambient temperature drops, those coils must cool further, and below approximately 45–50°F they ice over, blocking airflow and triggering defrost cycles that interrupt dehumidification. Below 35°F, most refrigerant units cease effective operation entirely. The MP-175's desiccant rotor adsorbs moisture through a chemical process with no such temperature limitation — it operates from sub-freezing temperatures through 140°F and can achieve grain depressions well below what LGR equipment can sustain. The MP-175 operates on 208–240V single-phase 60Hz power and the reactivation exhaust — warm and moisture-laden — must be ducted to the building exterior. Returning that exhaust to the conditioned space negates the dehumidification effect.

Documents

MiniPAC MP-175 Overview