The Haier DW-86L578BPST is a −86°C upright ultra-low freezer built around a dual independent hydrocarbon refrigeration system — two complete circuits, each able to hold −80°C on its own, so a single compressor failure never means a lost sample load. This TwinCool design pairs that redundancy with intelligent frequency-conversion (variable-speed) compressors that cut energy use roughly 50% versus traditional HFC ULT freezers, in a 578 L (20.4 cu ft) Energy Star, UL-certified cabinet.
Key Specifications
| Model | DW-86L578BPST |
| Cabinet type | Upright |
| Cooling performance | −86°C |
| Temperature range | −40°C to −86°C |
| Refrigeration | Dual independent HC circuits, frequency conversion |
| Capacity | 578 L / 20.4 cu ft |
| Rack capacity | 16 racks / 400 two-inch boxes |
| Inner doors / shelves | 4 inner doors / 3 stainless adjustable shelves |
| Controller / display | Microprocessor, LCD touchscreen |
| Sound level | 42 dB(A) |
| Power supply | 100–230 V / 50/60 Hz |
| Max power | 1100 W |
| Backup | CO₂ / LN₂ backup optional |
| Certification | UL, ENERGY STAR |
Application Profile
A ULT freezer holding an entire lab's biobank is a single point of failure, and the conventional mitigation — a second backup freezer or a CO₂ bottle — is expensive and reactive. The DW-86L578BPST answers that at the hardware level: two fully independent refrigeration circuits, either of which can sustain −80°C alone. If one system faults, the other carries the load while service is arranged, so the samples inside never leave the safe band. That redundancy is the reason to specify a BPST over a single-system JA-series freezer of the same volume.
The frequency-conversion compressors vary speed to match demand rather than cycling hard on and off, which is what delivers both the energy savings and a very low 42 dB(A) sound level — quiet enough for occupied lab space. Hydrocarbon refrigerant and LBA foam keep global-warming potential minimal. Four insulated inner doors divide the cabinet so opening one compartment barely disturbs the other three, protecting temperature during routine access.
Design Architecture
The LCD touchscreen controller gives at-a-glance status and drives a full alarm suite: high/low temperature, power failure, high/low voltage, sensor error, low battery, high ambient temperature, door ajar, and start-up delay, with a USB interface, remote alarm contact, 5V port, and standard RS-485. Three stainless adjustable shelves across 16 racks organize up to 400 two-inch boxes. Both CO₂ and LN₂ backup systems are available as options for facilities that want a third layer of power-loss protection on top of the dual-circuit redundancy.
Frequently Asked Questions
What makes the BPST different from a standard −86°C freezer? It has two completely independent refrigeration circuits. Each can hold −80°C by itself, so a single-system failure does not put the stored samples at risk.
What temperature range does it cover? −40°C to −86°C, with a −86°C cooling performance.
How many boxes does it hold? 578 L across 16 racks — up to 400 two-inch cryo boxes on 3 adjustable shelves behind 4 inner doors.
Is it energy efficient? Yes. Variable-speed frequency-conversion compressors and HC refrigeration cut energy use about 50% versus traditional HFC systems, and it is ENERGY STAR certified.
What power does it need? Universal 100–230 V, 50/60 Hz input, up to 1100 W.
Ordering & Configuration
The DW-86L578BPST is a capital freezer: request a quote for pricing, freight, and siting. It ships palletized and benefits from a documented placement and validation plan. Covered by Haier Biomedical's manufacturer warranty — confirm current warranty length and lead time with your quote.
Specify the DW-86L578BPST when sample security is non-negotiable and you want built-in redundancy rather than a separate backup freezer. If a single refrigeration system is acceptable and budget is tighter, the frequency-conversion single-circuit DW-86L579BPT (same 578/579 L class) is the step down; the JA-series is the value single-system option.
