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Upgrade your lab’s storage with the DHH4-20SDFMS Upright Refrigerator, boasting 20.0 cubic feet of space and advanced temperature control to keep your sensitive materials perfect condition. This eco-friendly, NFPA & OSHA-compliant powerhouse ensures safety and security with a keyed lock and robust alarm system. Designed for efficiency and reliability, it features user-friendly digital displays, forced air circulation, and a hermetic compressor. Trust the DHH4-20SDFMS to elevate your lab’s performance and protect your precious samples.
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Actual DHH4-20SDFMS exterior. Storage containers and optional monitoring equipment are not included.
DHH4-20SDFMS • FLAMMABLE MATERIAL STORAGE
The So-Low DHH4-20SDFMS gives your lab 20 cu. ft. (566 L) of refrigerated storage with five adjustable shelves, a keyed door and a published 1°C to 10°C range. Its digital display, min/max temperature recall and high/low alarm put day-to-day temperature checks at the cabinet.
So-Low identifies this FMS model for flammable-material storage in general laboratory work areas. Match the refrigerator to your material’s storage instructions and your facility’s safety assessment; FMS storage and hazardous-location equipment are different selections.
20 cu. ft.
566 L capacity
1°C to 10°C
Published temperature range
5 adjustable shelves
Plan container spacing
Digital + alarm
Standard controls
So-Low states that this model meets NFPA / OSHA Guidelines 45 & 70 for flammable-material storage in general laboratory work areas. This is the manufacturer’s stated application; it is not a blanket approval for every material, process or location.
Start with the material’s safety data sheet, required temperature and the facility’s storage plan. Use a refrigerator selected for the material rather than assuming an ordinary laboratory or household refrigerator is appropriate.
Do not treat the SDFMS model as an explosion-proof or hazardous-location refrigerator. If your installation requires a classified-location rating, obtain equipment with the exact documented classification your facility requires.
Equipment selection and installation remain subject to your facility’s environmental-health-and-safety review and applicable requirements.
The digital display shows cabinet temperature, while min/max display and reset help staff review readings between checks. The audible high/low temperature alarm adds a local warning when attention is needed.
Digital temperature display, min/max display/reset and an audible high/low alarm. Dry contacts provide a connection point for a suitable external alarm system.
An alarm relay is not a data logger, Wi-Fi connection or automatic text alert. No built-in USB export, cloud service or refrigeration battery backup is included in the verified standard configuration.
Cycle defrost and forced-air circulation distinguish this model from the larger 30-cu.-ft. manual-defrost unit. Keep the loading arrangement compatible with air movement and follow the applicable operating instructions.
30.75″ W × 29″ D × 74.5″ HMeasure the entire route, including doorways, turns, elevators and the final placement area.
24.75″ W × 20.75″ D × 65.25″ HCompare container sizes and required shelf spacing. Cubic capacity alone does not establish a usable bottle count.
115 V / 60 Hz / single phaseDedicated 15 A line, NEMA 5-15 connection and four leveling legs. Published running current: 3 A.
Cabinet dimensions are not shipping-crate dimensions or a door-open envelope. Allow the ventilation and service space required by the applicable installation instructions; confirm shelf loading before finalizing a storage layout.
Selection overview. The 30-cu.-ft. model is not simply a larger version of the 20-cu.-ft. control system.
Both models offer a 1°C to 10°C published range and five adjustable shelves, but their controls, defrost method and warranty differ. Choose the workflow you need, not just the larger capacity.
20 cu. ft. / 566 LDigital display with high/low alarm.Cycle defrost; forced-air circulation.Five adjustable shelves.Two-year parts-and-labor warranty.Consider it when included digital monitoring and the narrower cabinet matter.
30 cu. ft. / 849 LMechanical thermostat as standard.Manual defrost; gravity-flow circulation.Five adjustable shelves.One-year parts-and-labor warranty.Consider it when greater capacity matters and you can plan manual-defrost maintenance.View DHH4-30SDFMS
Tell us the destination ZIP or postal code, whether the facility has a loading dock, and whether liftgate or inside-delivery service is needed. Confirm the route from receiving to the final room, not just the space where the refrigerator will stand.
Manufacturer dispatch timing and transit time are different. Confirm current availability, freight scope and estimated timing before placing an order. Inspect the shipment on arrival, have the carrier record visible damage or shortages, retain packaging and photographs, and contact Blue Tiger promptly with any issue.
Alternative model: compare the DHH4-30SDFMS. Review its control and defrost differences before selecting it.
Receiving checklist illustration, not an installation drawing. Confirm required clearances and service access for your unit.
Group materials by your lab’s storage plan, arrange containers so labels can be read, and set shelf spacing to suit container height. Keep materials in suitable closed containers and follow the facility’s segregation and storage procedures.
Five adjustable shelves, a keyed insulated-steel door, painted-steel interior and exterior, four leveling legs and a ¾″ access porthole.
Containers, extra shelves, monitoring probes, recording devices and external notification systems are not included. Confirm exact fit and order codes before adding an accessory.
Related workflow: compare the verified alternative model linked above. No unverified accessory compatibility or bottle-count capacity is implied.
The DHH4-20SDFMS has a published 1°C to 10°C temperature range and 20 cu. ft. (566 L) capacity. Match that range to each material’s storage instructions and your facility’s procedures; a general FMS application label does not establish suitability for every chemical.
This listing is for the DHH4-20SDFMS flammable-material-storage refrigerator for general laboratory work areas. It is not presented as hazardous-location or explosion-proof equipment. If your room or process requires a classified-location rating, obtain the exact documented equipment classification your facility requires.
The DHH4-20SDFMS includes a digital display, min/max temperature display and reset, an audible high/low temperature alarm and a dry-contact alarm relay. The relay is a connection point for suitable external equipment, not an included remote-notification service.
The DHH4-20SDFMS uses cycle defrost and forced-air circulation. Follow the applicable operating and maintenance instructions and arrange storage so airflow is not obstructed. It differs from the DHH4-30SDFMS, which uses manual defrost and gravity-flow circulation.
The DHH4-20SDFMS includes five adjustable shelves. Published interior dimensions are 24.75″ W × 20.75″ D × 65.25″ H. Review container height, width, shelf spacing and permitted loading before ordering; this listing does not promise a specific bottle or rack count.
So-Low’s exact-model specifications list 115 V, 60 Hz, single-phase power, a dedicated 15 A line and NEMA 5-15 configuration for the DHH4-20SDFMS. Published running current is 3 A. Confirm the installation instructions for your actual unit and prepare the outlet and service access before delivery.
The DHH4-20SDFMS offers 20 cu. ft., digital controls with high/low alarm, cycle defrost and a two-year parts-and-labor warranty. The 30-cu.-ft. DHH4-30SDFMS has standard mechanical control, manual defrost and a one-year parts-and-labor warranty. Both have five adjustable shelves and a published 1°C to 10°C range.
Provide the DHH4-20SDFMS delivery destination, receiving hours, loading-dock access and any liftgate or inside-delivery needs. Confirm freight and current timing before shipment. So-Low lists a two-year parts-and-labor manufacturer warranty for this model. Contact Blue Tiger for order assistance, return authorization and coordination of manufacturer service.
Extra shelves, containers and optional monitoring equipment are sold separately. Confirm exact installation and accessory requirements before ordering.
Orders are fulfilled through Blue Tiger Scientific’s suppliers. Confirm availability, freight arrangements and any liftgate or inside-delivery requirements before ordering; extra service charges may apply. Transit estimates do not include processing or manufacturer lead times. Shipping is FOB origin unless otherwise agreed. Inspect the shipment, have the carrier record visible damage or shortages on the delivery receipt, retain packaging and photographs, and promptly contact Blue Tiger with order details.
Return eligibility is subject to the product’s stated conditions, applicable manufacturer requirements and Blue Tiger Scientific’s refund policy. Contact info@bluetigerscientific.com before returning equipment. An approved RMA and designated return address are required; do not send returns to Blue Tiger’s business address. Authorized non-defective returns may incur restocking fees of up to 30%, shipping deductions and prepaid, insured return-shipping costs. International returns are not permitted.
So-Low lists two years parts and labor for the DHH4-20SDFMS manufacturer warranty. Warranty service is separate from return authorization. Contact Blue Tiger for order assistance and coordination with So-Low service. Have the model, serial number and problem description available and obtain manufacturer instructions before attempting repairs or replacing parts while under warranty.
General literature covers more than one configuration. Use the instructions supplied with your actual unit for operation and service. Contact us for help obtaining a manual matched to your model and controller; general literature does not override the exact-model specifications.
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