The Haier DW-86L579BPT is a −86°C upright ultra-low freezer driven by two variable-speed (frequency-conversion) compressors whose control algorithm holds cabinet temperature to a tight ±3°C stability while cutting energy consumption. In a 579 L (20.4 cu ft) Energy Star, UL-certified cabinet with an LCD touchscreen, it is Haier's energy-optimized single-system ULT for core biobanking, reagent, and sample-archive duty.
Key Specifications
| Model | DW-86L579BPT |
| Cabinet type | Upright |
| Cooling performance | −86°C |
| Temperature range | −40°C to −86°C |
| Temperature stability | ±3°C |
| Refrigeration | Two variable-speed frequency-conversion compressors, HC |
| Capacity | 579 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 | 43.5 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
For a lab standardizing on −80°C storage for cell lines, nucleic acids, proteins, and clinical specimens, the operating cost and heat rejection of the freezer matter as much as the setpoint. The DW-86L579BPT uses frequency-conversion refrigeration — the compressors modulate speed to match the actual cooling load instead of slamming on and off — which lowers energy draw, reduces waste heat into the lab, and keeps the sound level down to 43.5 dB(A). The same modulation is what delivers the ±3°C cabinet stability that protects temperature-sensitive samples from thermal cycling.
Hydrocarbon refrigerant and LBA foam give the system an extremely low global-warming potential. Four insulated inner doors compartmentalize the cabinet, so retrieving from one section barely warms the others — a meaningful protection in a shared, frequently opened freezer.
Design Architecture
The LCD touchscreen surfaces live status and drives the full alarm set: high/low temperature, power failure, high/low voltage, sensor error, low battery, high ambient temperature, door ajar, and start-up delay, with USB, remote alarm contact, 5V port, and standard RS-485 for facility monitoring. Sixteen racks on 3 adjustable stainless shelves hold up to 400 two-inch boxes, and optional CO₂ or LN₂ backup adds power-loss protection.
Frequently Asked Questions
What temperature does the DW-86L579BPT hold? −40°C to −86°C, with a −86°C cooling performance and ±3°C cabinet stability.
How is it different from the DW-86L578BPST? The 579BPT is a single frequency-conversion refrigeration system; the 578BPST adds a second fully independent circuit for redundancy. Both are the same ~578/579 L class — choose BPST for failure tolerance, 579BPT for efficiency at lower cost.
How much does it hold? 579 L across 16 racks — up to 400 two-inch boxes on 3 adjustable shelves behind 4 inner doors.
Is it energy efficient? Yes. Variable-speed frequency-conversion compressors plus HC refrigeration make it ENERGY STAR certified.
What power input does it use? Universal 100–230 V, 50/60 Hz, up to 1100 W.
Ordering & Configuration
The DW-86L579BPT is a capital purchase: request a quote for pricing, freight, and installation planning. It ships palletized and benefits from a documented siting and validation plan. Backed by Haier Biomedical's manufacturer warranty — confirm current terms and lead time with your quote.
Pick the DW-86L579BPT when you want the lowest energy cost and quietest operation in a 578 L-class −86°C upright and a single refrigeration system is acceptable. Step up to the DW-86L578BPST for dual-circuit redundancy; step to the JA-series if you want a simpler fixed-speed unit at a lower entry price.
