In our search, we identified four models of large ultralow (-86 C) temperature freezers that are above the basic laboratory standards, but not of pharmaceutical grade. We compared the characteristics available from the manufacturers' websites and/or communicated to us by the companies' representatives.

Innova New Brunswick Scientific model U725 Premium New Brunswick Scientific modele U700 Thermo Forma; Fisher FOR990 Thermo Forma; Fisher FOR956
Capacity litre 725 l (25.6 pi cu) 700 l (25 pi cu) 651.3L (23 pi cu) 651.3L (23 pi cu)
Insulation “Ultra-thin (3.15”“ 88mm thick) vacuum insulation panel encapsulated between a metallic polymer film barrier bonded to polyurethane foam” polyurethane foam 130 mm thick non-CFC foamed-in-place polyurethane insulation in the cabinet; 12.7 cm thick in cabinet; 11.4 cm in the door. non-CFC foamed-in-place polyurethane insulation in the cabinet; 12.7 cm thick in cabinet; 11.4 cm in the door.
Temperature control Microprocessor Temperature Control System Microprocessor Temperature Control System Patented refrigerated system improves temperature control for more consistent temperature cycling Patented refrigerated system improves temperature control for more consistent temperature cycling
Air filter Air filter front-mounted easily accessed Air filter front-mounted easily accessed Convenient hinged air filter grill allows easy access for inspection cleaning and/or changing. Convenient hinged air filter grill allows easy access for inspection cleaning and/or changing.
Access port Two pass-through ports 3/4 20mm diameter Two access ports; pass-through ports 3/4 20mm diameter Unknown Unknown
Battery back up Battery back-up system activate alarms and displays temperature Battery back-up system activate alarms and displays temperature Battery back-up system is standard Battery back-up system is standard
Refrigerant Non-CFC Non-HCFC Non-CFC Non-HCFC non-CFC refrigerants non-CFC refrigerants
Refrigeration cascade refrigeration: Hermetically-sealed two-stage casdace system cascade refrigeration: Hermetically-sealed two-stage casdace system cascade refrigeration: cascade refrigeration:
Temperature range From +32 down to -86 in 1C increment From +32 down to -86 in 1C increment range -50 to -86 range -50 to -86
Handle Molded handle with removable lock. One handed operation easy to open. Can be reopened as frequent as desired due to vent Molded handle with removable lock. One handed operation easy to open. Can be reopened as frequent as desired due to vent New ergonomically designed door latch/handle New ergonomically designed door latch/handle
Lock Removable keyed lock Removable keyed lock Locakble Locakble
Air circulation Requires just one fan. Requires just one fan. front-to-back air circulation system front-to-back air circulation system
Voltage stabilizer or compensator Internal voltage stabilizer optional optional Automatic Voltage Compensator Automatic Voltage Compensator
Compressor Low-noise heavy duty commercially available Low-noise heavy duty commercially available Embraco Leading compressors 1 HP (horse power) by Copland. Leading compressors 1 HP (horse power) by Copland.
Exterior 18 gauge steel 1.2 mm thick. Powder coated scratch and rust resistant. 18 gauge steel 1.2 mm thick. Powder coated scratch and rust resistant. Heavy gauge cold-rolled steel cabinets with powder coat paint finish. Uniform exterior surface resists chipping and rust Heavy gauge cold-rolled steel cabinets with powder coat paint finish. Uniform exterior surface resists chipping and rust
Outer door One outer door One outer door Two outer doors (double doors model) One outer door
Outer door sealing Insulated with high-efficiency silicone seals. Insulated with high-efficiency silicone seals. Triplepoint silicone gasket with one bulb and two feathered edges Triplepoint silicone gasket with one bulb and two feathered edges
Outer door hinges Heavy-duty Epoxy coated steel door hinges ensure proper alignment. Heavy-duty Epoxy coated steel door hinges ensure proper alignment. Heavy-duty stainless steel door hinges ensure proper alignment Heavy-duty stainless steel door hinges ensure proper alignment
Outer door latch Molded handle with removable lock. One handed operation easy to open. Can be reopened as frequent as desired due to vent cam-action reverse cam-action for easy one-handed opening new latch/handle design ensure a snug door seal new latch/handle design ensure a snug door seal
Pressure release Heated Vent with spring-assisted plunger to break icing prevents vacuum formation allows to re-open door quickly Heated Vent with spring-assisted plunger to break icing prevents vacuum formation allows to re-open door quickly Vacuum relief port allows pressure to equalize quickly Vacuum relief port allows pressure to equalize quickly
Compartment Three compartments with two adjustable-height stainless-steel shelves Five compartments with four adjustable-height stainless-steel shelves Four interior compartments doors complete with sliding latches; three fully adjustable solid stainless steel shelves Four interior compartments doors complete with sliding latches; three fully adjustable solid stainless steel shelves
Inner doors Three inner doors insulated and gasketed with high quality seals. Push-oull latch. Five inner doors insulated and gasketed with high quality seals. Push-oull latch. four inner doors four inner doors
Interior Stainless-steel interior polished 304L Stainless-steel interior polished 304L Stainless steel Stainless steel
Noise level (Decibel) 59 db 61.8 db Acoustical mufflers designed into the base and sound absorbing foam reduce noise level 58 db Acoustical mufflers designed into the base and sound absorbing foam reduce noise level 58 db
Casters Heavy-duty lockable casters with leveling feet Heavy-duty lockable casters with leveling feet lockable casters lockable casters
“Max vial (2 inches boxes) capacity” 50400 48000 38000 44000
Racks per freezer 18 30 10+10 10+10
Electrical requirement 208/230V 60 Hz 120V ou 208/230V 60hz 120V 50/60 Hz 16/20 (P2) 120V 50/60Hz 1P
Exterior size 195mm H X 102.5mm W X 86.7mm D 1958 mm H X 1125 mm W X 871 mm D 1976 x 1036 x 940 1976 x 1036 x 940 ; 5-20P
Internal size 1355mm H x 865mmW x 615mm D 1355mm H x 865 mmW x 615mm D 1308 x 777 x 643 1308 x 777 x 643
Shipping weight 315 kg 315 kg 408.2 kg 408.2 kg
Heat release 2559.10 Btu/hr 750 Watts or 2560 Btu/h Unknown Unknown
Power consumption kilowatts per 24 hours 16.4 (a t208V) 15.8 (at 220V) 14.9 probably 18 probably 18
Pull down time (from 20 C to -80) Unknown 5.3 hours Unknown Unknown
Warm up time (from -80 to -50) Unknown Unknown approx 200 hours approx 200 hours
BTU absorption per hour Unknown Unknown 450 par heure 450 par heure
Warranty 5 year on all componants parts and labour 5 year on all componants parts and labour 1 year warranty on all componants parts and labour 1 year warranty on all componants parts and labour
Backup system Optional CO2 and LN2 safety back-up systems Optional CO2 and LN2 safety back-up systems Optional CO2 and LN2 safety back-up systems Optional CO2 and LN2 safety back-up systems
Data logger remote Accense data logger optionnal remote Accense data logger optionnal Optional digital datalogger or Sensaphone Optional digital datalogger or Sensaphone
Listing and certifications CE listed cUL listed meets WEEE directives cUL also meets CSA CE listed cUL listed meets WEEE directives cUL also meets CSA CSA approved; cUL CSA approved; cUL

Note: The access ports can be used to insert an external liquid N2 or CO2 backup system.