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NuAire NU-8700 Dual-Stack CO₂ Incubator
Laboratories with growing cell culture programs often face a common challenge: increasing incubation capacity without sacrificing valuable floor space. The NuAire NU-8700 Dual-Stack CO₂ Incubator addresses this need by combining two fully independent incubation chambers into a single vertical system, effectively doubling culture capacity while maintaining the footprint of a single incubator. Designed for research environments where multiple projects, investigators, or cell lines must be maintained simultaneously, the NU-8700 delivers dependable environmental control, contamination protection, and operational flexibility in one space-saving platform.
Each chamber operates independently, allowing researchers to maintain different temperatures, CO₂ concentrations, or experimental conditions without affecting the other incubator. Continuous closed-loop HEPA filtration, precise temperature regulation, controlled humidity, and a corrosion-resistant stainless steel interior help provide the stable environment required for sensitive mammalian cell culture. For busy biotechnology laboratories, pharmaceutical research facilities, university core laboratories, and hospital research centers, the NU-8700 offers the productivity of two incubators while simplifying laboratory layout and infrastructure. Purchasing a refurbished NuAire NU-8700 from American Instrument Exchange provides laboratories with premium dual-incubator capacity at substantial savings compared with purchasing two new standalone incubators.
Key Features
Dual independently controlled incubation chambers
Approximately 6.6 cu. ft. total capacity (3.3 cu. ft. per chamber)
Independent temperature and CO₂ control for each chamber
The defining advantage of the NuAire NU-8700 is not simply its incubation performance—it's its ability to support multiple research programs simultaneously. Rather than placing all cultures into one large chamber, researchers gain two completely independent incubation environments that can operate under different conditions.
One chamber may be dedicated to routine mammalian cell culture while the second supports stem cells, primary cultures, quality control samples, or long-term experiments. Separate chambers also reduce unnecessary door openings, minimizing environmental disturbances for cultures that do not require access throughout the day.
Because each chamber functions independently, laboratories gain additional operational flexibility. One chamber can remain in service while maintenance or cleaning is performed on the other, helping reduce downtime in laboratories where incubators operate continuously.
The stacked design also makes the NU-8700 particularly attractive for facilities where laboratory floor space is limited but incubation demand continues to grow. Rather than purchasing additional floor-standing incubators, researchers can effectively double capacity within the footprint of a single instrument.
Common Applications
The NuAire NU-8700 is commonly used for:
Mammalian cell culture
Stem cell research
Primary cell culture
Cancer biology
Tissue engineering
Regenerative medicine
Hybridoma production
Protein expression
Pharmaceutical research
Biotechnology research
Vaccine development
Clinical laboratory research
Cell banking
Long-term maintenance of valuable cell lines
The dual independent chambers make the incubator particularly valuable for laboratories managing multiple concurrent research projects or requiring physical separation between different culture programs.
Ideal Laboratory Environments
The NuAire NU-8700 is well suited for biotechnology companies, pharmaceutical manufacturers, university research laboratories, hospital research facilities, government laboratories, and contract research organizations requiring increased incubation capacity without expanding laboratory space.
Its dual-stack configuration is especially beneficial for shared laboratory environments where multiple investigators require dedicated incubation space. Individual chambers can be assigned by project, department, or researcher while maintaining independent environmental settings and minimizing cross-traffic between experiments.
Temperature Recovery and Environmental Stability
Each chamber of the NU-8700 is independently controlled using a microprocessor-based environmental management system designed to maintain stable incubation conditions throughout routine laboratory operation. Temperature control from 5°C above ambient to 55°C supports a wide variety of mammalian cell culture applications, while independent CO₂ regulation from 0% to 20% allows each chamber to be optimized for specific experimental requirements.
Because the chambers operate independently, opening one incubator does not disturb the environmental conditions within the second chamber. This isolation improves temperature stability for long-term cultures while reducing recovery time compared with repeatedly accessing a single large incubator throughout the day.
Continuous Contamination Protection
NuAire designed the NU-8700 to simplify contamination prevention through continuous air purification and an interior optimized for routine cleaning. Each chamber utilizes a closed-loop HEPA filtration system that continuously filters recirculated chamber air, helping reduce airborne particulates and maintain a cleaner incubation environment during normal operation.
The polished stainless steel chamber features rounded interior corners that eliminate difficult-to-clean crevices where contaminants can accumulate. Removable shelving and interior components simplify routine maintenance, while the natural humidity reservoir supports healthy cell growth by reducing evaporation of culture media during extended incubation.
By combining continuous HEPA filtration with independently controlled chambers, the NU-8700 helps laboratories reduce contamination risk while providing greater flexibility for managing multiple culture programs simultaneously.
Sample Storage Recommendations
The NuAire NU-8700 dual-stack configuration provides approximately 13.2 cubic feet (374 liters) of total incubation capacity, with each independently controlled chamber offering approximately 6.6 cubic feet (187 liters) of usable space. This generous capacity allows laboratories to significantly increase throughput while maintaining complete separation between research projects, investigators, or cell lines.
Each chamber easily accommodates large quantities of T-flasks, culture dishes, multiwell plates, roller bottles, spinner flasks, cell culture bags, and other vessels commonly used for mammalian cell culture. Adjustable stainless steel shelving allows researchers to customize the chamber layout for different vessel sizes while maximizing available incubation space.
For optimal environmental performance, culture vessels should be evenly distributed throughout each chamber to allow unrestricted airflow and uniform circulation of temperature, humidity, and CO₂. Many laboratories dedicate one chamber to routine production cultures while reserving the second for primary cells, stem cell research, long-term experiments, or sensitive projects requiring minimal disturbance. Because each chamber operates independently, researchers can access one incubator without affecting the environmental stability of cultures housed in the other.
Energy Efficiency and Operating Costs
One of the greatest advantages of the NuAire NU-8700 is its ability to provide the capacity of two full-size CO₂ incubators while occupying substantially less laboratory floor space than two separate units. For growing research facilities, this efficient vertical configuration maximizes incubation capacity without requiring additional laboratory renovations or bench space.
Independent environmental controls allow each chamber to operate separately, giving laboratories the flexibility to dedicate chambers to different research groups or experimental protocols. This reduces unnecessary door openings, minimizes environmental fluctuations, and improves overall laboratory workflow.
The continuous closed-loop HEPA filtration system helps maintain cleaner chamber air during routine operation, while the stainless steel interior and removable shelving simplify routine cleaning and maintenance. Together, these features contribute to dependable long-term operation while helping laboratories maximize productivity from a single dual-stack incubator system.
Key Specifications
Specification
Details
Manufacturer
NuAire
Model
NU-8700
Configuration
Dual-Stack CO₂ Incubator
Chamber Capacity
Approximately 6.6 cu. ft. (187 L) per chamber
Total Capacity
Approximately 13.2 cu. ft. (374 L)
Temperature Range
Ambient +5°C to 55°C
CO₂ Range
0% to 20%
CO₂ Sensor
Thermal Conductivity (TC)
Air Filtration
Closed-Loop HEPA Filtration
Humidity Control
Natural Water Reservoir
Chamber Material
Stainless Steel
Interior Corners
Rounded for Simplified Cleaning
Shelving
Adjustable Stainless Steel Shelves
Controller
Independent Digital Microprocessor Controls
Alarm System
Audible and Visual
Interior Dimensions (Each Chamber)
Approximately 21.5" W × 22.5" D × 24.0" H
Exterior Dimensions
Approximately 27.5" W × 34.0" D × 76.0" H
Electrical Requirements
120 V
Approximate Weight
Approximately 650 lb
Specifications are believed to be accurate but may vary depending on factory-installed options. Please verify all specifications prior to purchase.
Frequently Asked Questions
What is the primary advantage of the NuAire NU-8700 compared with a standard CO₂ incubator?
The NU-8700 combines two full-size 6.6 cubic foot incubators into a single stacked system, providing over 13 cubic feet of total incubation capacity while maintaining the footprint of one piece of equipment. This makes it an excellent solution for laboratories that need additional capacity but have limited floor space.
Can each chamber operate independently?
Yes. Each chamber has its own temperature control, CO₂ regulation, alarms, and environmental management system. Researchers can maintain different incubation conditions or dedicate chambers to separate projects without affecting one another.
Why choose a dual-stack incubator instead of two separate incubators?
A stacked system saves valuable laboratory floor space, simplifies laboratory layout, and centralizes incubation capacity while still providing the operational flexibility of two independent incubators.
How does the closed-loop HEPA filtration system benefit cell culture?
Each chamber continuously circulates air through a HEPA filter to remove airborne particulates during normal operation. Cleaner chamber air helps reduce contamination risk and supports healthier long-term cell cultures.
What applications is the NU-8700 best suited for?
The incubator is ideal for mammalian cell culture, stem cell research, regenerative medicine, cancer biology, vaccine development, pharmaceutical research, biotechnology, protein expression, tissue engineering, and other life science applications requiring large incubation capacity.
Is the NU-8700 appropriate for shared laboratories?
Absolutely. The independent chambers allow multiple investigators or research groups to operate simultaneously while maintaining separate environmental conditions and minimizing disruptions caused by routine chamber access.
How much culture capacity does the NU-8700 provide?
Each chamber offers approximately 6.6 cubic feet (187 liters) of usable incubation space, for a combined total of approximately 13.2 cubic feet (374 liters), making it an excellent choice for high-throughput cell culture laboratories.
Why purchase a refurbished NuAire NU-8700 from American Instrument Exchange?
Purchasing a refurbished NuAire NU-8700 from American Instrument Exchange provides laboratories with the productivity of two independently controlled full-size CO₂ incubators in one space-saving system at substantial savings compared with purchasing new equipment. Every incubator is inspected and tested prior to shipment and includes a 90-day warranty, providing confidence that it is ready to support demanding cell culture applications.
Click here to see the Nuaire NU-8700 on the American Instrument Exchange YouTube channel.
Testing Procedures for Used and Refurbished CO₂ Laboratory Incubators Ensure Atmosphere Control, Temperature Accuracy, and Regulatory Compliance
At American Instrument Exchange, all used and refurbished CO₂ incubators undergo a multi-step testing and calibration process. These procedures are designed to ensure precise environmental control, microbial safety, and long-term reliability—critical for cell culture, IVF, tissue engineering, and pharmaceutical R&D applications.
Why Testing Used CO₂ Incubators Is Essential
Before a CO₂ incubator is redeployed into a laboratory, it must be thoroughly tested for:
• CO₂ sensor accuracy and gas concentration control
• Temperature uniformity and stability
• Humidity system function
• HEPA filtration and contamination control
• Electrical and safety compliance
Proper testing ensures viable growth environments for sensitive cultures and prevents costly contamination or culture loss in high-stakes lab environments.
Our standardized refurbishment protocol ensures used CO₂ incubators deliver laboratory grade performance at a fraction of the cost of comparable new units.
Key Testing Procedures for Refurbished and Used CO₂ Incubators
1. Initial Visual Inspection
• Inspect the exterior for corrosion, dents, or door alignment issues
• Check door gasket integrity and hinge function
• Verify presence and condition of internal shelves, water pans, and humidity trays
• Examine power cords, gas connectors, and display interfaces for signs of wear
2. Functional Startup Test
• Power on the unit and check for successful system boot
• Verify touchscreen or keypad response, and test all user-programmable settings
• Check door alarms and temperature/CO₂ alerts
3. Temperature Control and Uniformity Testing
• Use temperature probes to verify internal temperature accuracy
• Monitor temperature uniformity across multiple chamber zones
• Ensure fast recovery times after door openings
4. CO₂ Sensor Testing and Gas Delivery System Test
• Test accuracy of infrared (IR) or thermal conductivity (TC) CO₂ sensors using certified reference gas and probes/Fyrite analyzers
• Test inlet pressure regulators and gas flow control systems
• Confirm stable CO₂ levels at multiple setpoints (e.g., 5%, 10%)
• Check for proper mixing and diffusion throughout the chamber
5. Humidity and Contamination Control Testing
• Test humidity generation (via water pan or active system) and verify chamber RH levels
• Inspect HEPA filters (if equipped) and airflow systems for particulate control
• Sanitize interior and confirm antimicrobial coatings or copper components are intact
6. Electrical Safety and Compliance Check
• Ensure proper grounding and insulation of all electrical components
• Perform leak and continuity testing
• Verify the unit meets electrical safety standards for laboratory environments
7. Final Quality Assurance and Performance Validation
• Run a 24-hour performance cycle with monitored CO₂, temperature, and RH
• Document data and final readings
• Complete service report
All refurbished CO₂ incubators sold by American Instrument Exchange are tested to meet the performance demands of today's advanced laboratory workflows—ensuring safety, precision, and peace of mind with every unit.
Repair and Refurbishment Protocol for Used Laboratory Incubators Performance and Quality from American Instrument Exchange
At American Instrument Exchange, every used laboratory incubator we sell goes through a repair and refurbishment protocol. Whether it’s a standard, CO₂, or refrigerated incubator, our goal is to restore each unit to laboratory-level performance—ensuring temperature accuracy, environmental stability, and long-term reliability in your lab.
Why Choose a Refurbished Laboratory Incubator from American Instrument Exchange?
• Fully tested for performance and safety
• Backed by a warranty
• Cost-effective alternative to new equipment
• Environmentally sustainable through reuse and restoration
• Refurbished by expert technicians with decades of lab equipment experience
Step-by-Step Refurbishment Protocol
Every incubator at American Instrument Exchange follows this comprehensive, multi-stage process:
1. Initial Intake & Inspection
• Visual inspection for cosmetic wear, corrosion, dents, or broken components
• Mechanical assessment of door hinges, gaskets, seals, and chamber components
• Document any missing parts or issues requiring repair or replacement
2. Cleaning and Decontamination
• Thorough internal and external cleaning using non-abrasive solutions
• Decontamination/cleaning of surfaces to remove biological, chemical, or particulate residue
• Cleaning of removable parts (e.g., shelves, trays, etc.)
3. Mechanical and Electrical Repair
• Repair or replacement of worn mechanical components such as door latches, fans, hinges, and seals
• Evaluation and repair of control panels, switches, thermostats, and displays
• Inspection and testing of wiring, fuses, relays, and power supplies
4. Environmental Control System Assessment
• For CO₂ incubators: CO₂ sensors, regulators, and gas delivery systems are tested
• For refrigerated incubators: compressors, condensers, and cooling systems are evaluated for performance and leaks
• Fan motors and airflow systems are tested to ensure uniform environmental conditions
5. Temperature and Sensor Testing
• All temperature sensors and controllers are tested using thermometers/probes
• Uniformity and accuracy tested at multiple chamber locations
• For humidified or CO₂ incubators, humidity and CO₂ stability are verified
6. Safety System Testing
• Test of over-temperature protection systems and alarms
• Evaluation of door sensors, safety interlocks, and power failure recovery
7. Final Quality Control and Documentation
• Full performance test run over 24 hours
• Validation of setpoints for temperature, CO₂ (if applicable), and humidity (if applicable)
• Final inspection and cleaning before packaging
• Complete service report
Trust the Experts at American Instrument Exchange
With over 50 years in the lab equipment industry, American Instrument Exchange is a trusted source for high-quality refurbished laboratory incubators. Our proven refurbishment protocol ensures every unit is reliable, accurate, and ready to meet the demands of your lab from day one.
Warranty Information
All used equipment sold by American Instrument Exchange is refurbished/reconditioned, tested to meet specifications, cleaned, and comes with a 90-day warranty from the date of shipment unless otherwise specified. New products include a warranty from the manufacturer. Your warranty is only valid if you have paid your invoice. If your invoice is over 30 days old, warranty work will not be performed until your invoice is paid in full. American Instrument Exchange is not liable for any special or consequential damages that result from the use of, or the inability to use, the materials on this site or the performance of the products,
Exceptions include international sales and items that are agreed to be sold with a lesser warranty or items that are agreed to be sold “as is.”
Should there be visible shipping damage to packaging or concealed shipping damage to item(s) supplied, buyer must communicate such damage to the delivering entity or carrier upon receipt first and to American Instrument the same day item is accepted / signed for. Failure to do so voids warranty. Customer decision to involve / procure third party or OEM service other than American Instrument or AIE assigned vendors to resolve in-warranty instrument failure or defect without first placing a service call to American Instrument voids warranty.
Return & Cancellation Policy
American Instrument Exchange will authorize the return of and issue a full refund for any equipment that is not working as represented and could not be replaced or repaired to the customer’s satisfaction by AIE or a representative of AIE during the warranty period. Returns without prior authorization and an RMA number will not be accepted.
Customers are responsible for proper packaging of the equipment and all included accessories. American Instrument will pay for insurance and shipping costs. Non-inventory items bought specifically to fill customer orders may possibly be returned, but on a case by case basis.
Customers who cancel orders after refurbishing has begun or after delivery where there are no equipment performance issues may be subject to a Restocking/Cancellation Fee of 20% or more and responsible for shipping costs for both the delivery and return.
Ongoing and Extended Support Options
American Instrument Exchange is able to provide additional repair and support services outside the warranty terms for most products that sell.
For biosafety cabinets, clean benches, chemical fume hoods, and other clean air products our team at AIE Laboratory Services can provide certifications, repairs, decontaminations, and other services for customers throughout New England, and guidance and limited technical assistance for any customers in the US and Canada for new or refurbished biosafety cabinets purchased from American Instrument Exchange.
For all other products, the repair service team at American Instrument Exchange can provide both field and depot repair evaluations. We can easily schedule and coordinate the pick-up and transportation of your malfunctioning equipment. By offering hourly rates lower than most OEM service providers and eliminating travel time for technicians, we help reduce repair costs. Furthermore, our lab depot repair service minimizes or eliminates scheduling delays. Our experienced service technicians are qualified to restore your equipment to factory specifications.
Yes, all equipment from American Instrument Exchange comes with a warranty. Used/reconditioned/refurbished equipment is tested to make sure it operates to the manufacturer's specifications and comes with a 90-day warranty (unless otherwise noted). New equipment comes with a warranty from the manufacturer.
How do you test and recondition the equipment?
Testing requirements vary across all the equipment categories we sell. Temperature controlled units are tested with NIST traceable probes and data loggers. Gaskets, external housing, glass, handles, controls and control screens are all thoroughly inspected for integrity and functionality. We test all equipment using the manufacturer's parameters and specifications to confirm that the unit operates properly.
How do products ship from American Instrument Exchange?
We can ship products both nationally and internationally using a well-established network of transporters. Smaller items will ship via UPS. Larger equipment will be palletized and shipped either LTL or air-ride, depending on the specific equipment and/or delivery requirements.
Return and order cancellation policy
American Instrument Exchange will accept the return of any product that is not working as represented and could not be replaced or repaired to the customer's satisfaction during the warranty period. Customers who cancel orders after refurbishing has begun will be subject to a cancellation and restocking fee of between 20% and 40%.
Are discounts available for educational or non-profit institutions, or for bulk purchases?
Yes – call or email us today with a list of equipment you're looking for and we can potentially put together a quote that includes a discount.
How does your price matching policy work?
We strive to keep our pricing competitive and reasonable. If you find comparable items for sale at a lower price from other vendors please send us a link and or quote for the item and we'll do our best to match or beat the price.
Can I see the equipment in person before committing to a purchase?
Customers are welcome to make an appointment to view equipment in our warehouse. Given our workload we may not be able to test or clean the equipment prior to your arrival if you have not committed to an order.
1023 Western Avenue is a working warehouse, not a showroom, and customers should dress appropriately and wear closed toe shoes.
Can I ship products that I purchased elsewhere to American Instrument for repair?
Yes – please see our repair services page for more information.
