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.
