The Bry-Air MiniPAC MP-100 is a 100 CFM desiccant dehumidifier designed for environments where refrigerant-based LGR units cannot operate effectively: cold storage ante-rooms, pharmaceutical production areas, laboratories requiring relative humidity below 30% RH, server rooms with low temperature setpoints, and any application where continuous moisture removal without defrost interruption is required. At 3.3 lbs/hr moisture removal and 139 lbs, the MP-100 is sized for spaces where a large industrial desiccant unit would be over-specified, while delivering desiccant technology's core advantage — consistent performance across a temperature range that extends well below freezing.
MP-100 Desiccant Wheel Technology and Safety Systems
The MP-100 uses a rotating desiccant wheel rather than a compressor and refrigerant circuit. Process air (100 CFM) passes through the desiccant rotor where moisture is adsorbed into the hygroscopic desiccant matrix. The rotor continuously rotates into the reactivation sector where heated reactivation air (34 CFM) drives absorbed moisture out and exhausts it away from the process airstream. Because there is no compressor or evaporator coil, the unit has no icing threshold and no defrost cycle — it removes moisture continuously at temperatures where LGR units would shut down.
100 CFM process airflow at 0.70" wc external static — sized for laboratories, server rooms, small cold storage areas, and pharmaceutical rooms
3.3 lbs/hr moisture removal — consistent extraction rate independent of ambient temperature, unlike refrigerant units whose capacity falls 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 — separate the process and reactivation airstreams, preventing humid reactivation exhaust from re-entering dry process air
Differential air pressure switch — monitors airflow and triggers alarm or controlled shutdown if filter blockage or fan failure reduces airflow below operating threshold
Safety thermostat — protects the reactivation heater from overtemperature conditions during continuous-duty operation
Reactivation cooldown sequence — cools the heater element after shutdown before full stop, extending component life
Auto/manual operating modes — auto 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 applications
MP-100 Applications and Environments
Pharmaceutical manufacturers use the MP-100 in tablet coating rooms and packaging areas where moisture above 30% RH causes product clumping, coating defects, and shelf-life degradation. Analytical chemistry and materials testing laboratories deploy it to maintain controlled-humidity environments for hygroscopic samples and precision instrumentation that require stable, low-humidity conditions year-round. Cold storage operators use it in staging areas and ante-chambers adjacent to freezer vaults, where the low ambient temperature disables refrigerant dehumidifiers entirely. Electronics manufacturers and military depot maintenance facilities specify desiccant units in component storage areas to prevent corrosion on circuit boards, connectors, and precision assemblies. Seed banks, agricultural storage facilities, and archival document storage rooms use it for continuous moisture control in spaces where refrigerant equipment cannot sustain the required humidity floor.
Desiccant vs. Refrigerant: Technology Selection Criteria
Refrigerant dehumidifiers — including LGR units used in restoration — remove moisture by cooling process air below its dew point onto evaporator coils. As ambient temperature drops, the coils must cool to increasingly lower temperatures, and below approximately 45–50°F the coils ice over, blocking airflow and triggering defrost cycles that interrupt dehumidification. Below 35°F, most refrigerant units cease effective operation. The MP-100'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-100 requires 208–240V single-phase 60Hz power and the reactivation exhaust must be ducted to the building exterior; returning warm, moist reactivation air to the conditioned space negates the dehumidification effect.
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How to place a tax-exempt order:
Write to us through our Contact Us page or email info@uscleaningtools.com and attach your valid tax exemption certificate (state resale or exemption certificate).
We verify your certificate and mark your account tax-exempt — usually within one business day.
Place your order and sales tax will not be charged.
For volume pricing or purchase orders, call +1 (978) 295-7538.
Shipping & Returns
Free shipping on most brands for orders over $300, delivered to the lower 48 states. Any brand-specific freight rate is shown at checkout before you pay.
Processing & delivery: in-stock orders are processed within 1–2 business days and typically deliver in 5–7 business days. Tracking is emailed within 24 hours of shipment. Built-to-order and backordered equipment shows its lead time on this page.
Freight deliveries: inspect your equipment on arrival and note any damage on the delivery receipt. Items damaged in transit or defective on arrival are fully covered at no cost to you.
Cancellations: cancel any time before your order ships for a full 100% refund.
30-day returns: return unused equipment in its original packaging within 30 days of delivery. Change-of-mind returns are subject to a restocking fee. To start a return, email info@uscleaningtools.com or call +1 (978) 295-7538.
How does a desiccant dehumidifier differ from a refrigerant or LGR unit?
Refrigerant and LGR dehumidifiers remove moisture by cooling process air below its dew point onto evaporator coils. They lose efficiency below approximately 60°F and cease effective operation below 35°F due to coil icing and defrost cycling. The MP-100's desiccant rotor adsorbs moisture through a chemical process — no compressor, no evaporator, no icing. It delivers consistent 3.3 lbs/hr moisture removal at sub-freezing temperatures where LGR units cannot operate, and can achieve relative humidity levels below 30% RH that refrigerant units cannot sustain.
What is the minimum relative humidity the MP-100 can achieve?
Desiccant units can achieve significantly lower grain depressions than refrigerant equipment and are capable of reducing relative humidity below 10% RH under the right inlet conditions. The MP-100's achievable minimum depends on inlet temperature and humidity, process airflow rate, and reactivation heat input. For specific performance curves at your target conditions, request engineering data from Bry-Air for the MP-100.
What temperature range can the MP-100 operate in?
Desiccant dehumidifiers operate across a much wider temperature range than refrigerant units. The MP-100 is effective from approximately -4°F (-20°C) to 140°F (60°C), making it suitable for cold storage ante-rooms, freezer staging areas, and outdoor-adjacent installations in cold climates where refrigerant dehumidifiers would shut down or cycle through continuous defrost.
Does the reactivation exhaust need to be ducted outside?
Yes. The MP-100's reactivation air stream carries the moisture extracted from the process air and exits as warm, humid exhaust. This exhaust must be ducted to the building exterior. Dumping the reactivation exhaust back into the conditioned space returns the extracted moisture and eliminates the dehumidification effect entirely.
What does the differential air pressure switch do?
The differential air pressure switch monitors the pressure drop across the MP-100's air path. If a filter becomes blocked, a fan fails, or airflow drops below the operating threshold for any reason, the switch triggers an alarm or initiates a controlled shutdown. This protects the reactivation heater from overtemperature and alerts facility staff to a maintenance condition — a filter blockage in an unattended installation would otherwise go undetected until equipment damage occurred.
Can the desiccant rotor be serviced in the field?
Yes. The MP-100's desiccant rotor is water-washable and can be rinsed on-site to clear accumulated dust and particulate without chemical cleaning agents. The stainless steel flange resists corrosion during the wash process. Follow Bry-Air's rotor maintenance procedure to avoid damaging the desiccant matrix during washing.
What power supply does the MP-100 require?
The MP-100 requires 208–240V / 1-phase / 60Hz power. It is not compatible with standard 115V or 120V outlets. A dedicated 240V circuit — typically 20 or 30 amps depending on total connected load — is required. Verify available panel capacity and circuit sizing with a licensed electrician before installation.
Frequently Asked Questions
1. What payment methods can I use?
We accept Visa, MasterCard, American Express, Diners Club, Discover, major debit cards, and digital wallets like PayPal, Google Pay, Meta Pay, and Apple Pay.
2. When will my payment be processed?
Your credit/debit card or PayPal account will be charged when you place your order. Secure payment processing protects your information.
3. Will I receive an order confirmation?
Yes, a confirmation email will be sent to the provided email address once the order is placed.
4. How long does it take to process an order?
Orders are processed within 1-2 business days and then prepared for shipment.
5. How long does it take for my order to arrive?
Estimated arrival time (ETA) is 5-7 business days for all orders.
6. Do you offer warranty?
All our products come with a manufacturer warranty of at least 1 year, depending on the brand.
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