Eppendorf Innova® U535

Category Upright Lab Freezers
Manufacturer Eppendorf
Country of manufacture Germany

When it comes to maximizing sample storage capacity, Eppendorf Innova ULT freezers set the standard. These lab freezers like the Innova U535 take advantage of ultra-efficient, ultra-compact vacuum insulation panels which are used in combination with traditional insulation to slim down the freezer wall thickness from 130 mm to 80 mm. These models are ideal for labs short on space.


  • Vacuum insulation panels allow for increased internal capacity with the same footprint as traditionally foamed freezers
  • Inner doors are gasketed as well as insulated creating 3 separate compartments minimizing cold air loss while you access your samples
  • Easy-to-read, eye level, flush mounted LED control panel and alarm status
  • Each shelf is adjustable in height for additional storage flexibility
  • Special vacuum vent with plunger ergonomically located at waist level to gain immediate access to your freezer
  • Inner doors can be quickly removed without the need for tools for easier and faster defrosting
  • Full stainless steel interior for easy cleaning during maintenance and defrost cycles; powder-coated steel exterior
  • Special low-temperature outer door seals allow gaskets to remain flexible at –86 °C and prevent ice buildup for easy access to samples
  • Password protection of alarm and temperature setpoints to prevent unauthorized setting changes


ULT freezers are suitable for storage and preservation of all types of biological materials/samples:

  • Bacteria
  • Cells
  • Spores
  • Pollens
  • Protozoa
  • Blood components
  • DNA
  • Tissue used in research only
  • Preservation of chemicals or material testing components for a longer period of time
Key attributes
Min. Temperature -50°C to -86°C
Cubic Feet 18.9
Alarms Yes
Controls Digital
Defrost Manual
Electrical 115V, 60 Hz (or 208-230V)
Warranty (years) 5
Weight (lb) N/A
Width (in) 31.5
Depth (in) 34.1
Height (in) N/A

      Manufacturer Specifications
        Model Innova® U535 Innova® U535
        Cooling liquid R404A / R508B R404A / R508B
        Cooling type air-cooled air-cooled
        Heat output 720 W 720 W
        Insulation Vacuum insulation paneling / polyurethane foam Vacuum insulation paneling / polyurethane foam
        Capacity 535 L 535 L
        Capacity (ft3) 18.9 ft³ 18.9 ft³
        No. of internal doors 3 3
        No. of compartments 3 3
        Max. racks per freezer 12 12
        Noise level 56 dBA 56 dB
        High-Efficiency no no
        Power supply 115 V, 60 Hz 208 – 230 V, 60 Hz
        Max. power consumption 13,200 W 13,200 W
        Footprint (WxD) 80 x 86.7 cm 80 x 86.7 cm
        Temperature range -50 °C to -86 °C -50 °C to -86 °C
        Pull-down time to -80 °C 4 h1 4 h1
        Box capacity per freezer    
        53 mm (2 in) tall boxes 336 336
        64 mm (2.5 in) tall boxes 288 288
        76 mm (3 in) tall boxes 240 240
        102 mm (4 in) tall boxes 144 144
        127 mm (5 in) tall boxes 144 144
        DWP per freezer    
        10 cm (4 in) tall boxes 504 504
        Box capacity per rack    
        53 mm (2 in) tall boxes 28 28
        64 mm (2.5 in) tall boxes 24 24
        76 mm (3 in) tall boxes 20 20
        102 mm (4 in) tall boxes 12 12
        127 mm (5 in) tall boxes 12 12
        DWP 42 42

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        Eppendorf Innova® U535 Accessories