C1D1 Labs

C1D1 Classification: What is It and Why Do You Need It? 

C1D1 classification is a term used to describe an industrial space which handles flammable or combustible liquid materials. Such spaces must meet strict safety requirements in order to reduce the risk of fires, explosions, or other hazardous incidents. In order to ensure that these requirements are met, C1D1 certification is required for all such spaces. Let’s take a look at what this certification means and why it’s so important.

What Does C1D1 Stand For?

C1D1 stands for Class 1 Division 1, which refers to the Division of the National Fire Protection Association (NFPA) 70 Standard that outlines the safety requirements that apply to industrial spaces containing flammable and combustible vapors, liquids, gases, or combustible dusts or fibers. This standard applies to any space where there is a potential for hazardous conditions, including fire, explosions, or toxic gases. The standard also includes specific requirements for lighting, ventilation, fire suppression systems, and other safety measures that must be in place in order to protect workers and property from harm.

OSHA also defines the requirements for “electric equipment and wiring in locations that are classified depending on the properties of the flammable vapors, liquids or gases, or combustible dusts or fibers that may be present therein and the likelihood that a flammable or combustible concentration or quantity is present.”

Why Is C1D1 Certification Necessary?

C1D1 certification comes down to safety. To ensure that flammable vapors, liquids, gases, or dust are confined to a specific work area. C1D1’s provide a safeguard in the event of a fire or explosion, ensuring the incident is contained to a room. This not only protects operating personal, but the buildings and businesses surrounding the work area.

In order to ensure that industrial spaces with flammable and combustible solvents meet all applicable safety regulations, the NFPA requires that they be inspected by qualified personnel prior to being used. This inspection process will evaluate the space according to the NFPA 70 standard and certify that it meets all applicable safety regulations. Once certified, the space can then be used safely and legally for its intended purpose.

Furthermore, having a C1D1-certified space demonstrates that your company takes workplace safety seriously and has taken steps to proactively protect your workers from hazards posed by potentially dangerous materials. Additionally, having a C1D1-certified space may make your business more attractive to potential investors or customers who care about safety as much as you do.

What Does a C1D1 Include?

  • Enclosure structure – The C1D1 room / C1D1 lab / C1D1 booth is constructed of steel panels. C1D1’s can be constructed out single wall paneling, or two 20 gauge pieces of steel with insulation in between. The panels are interlocking with gloss white powder coat. Includes:
  • 3ft wide exit door
  • Explosion proof lighting
  • Gas monitoring system
  • Intake and exhaust ventilation system (additional ducting available for client specific needs)
  • PLC control panel w/ HMI
  • Audio and Visual alarms
  • Exit sign
  • Explosion proof electrical recepticals
  • ANSI rated eye wash station
C1D1 Visual Alarm
C1D1 Visual Alarm
C1D1 Audio Alarm
C1D1 Audio Alarm

H&H Extraction Solutions’ C1D1’s are professionally engineered and are delivered with EPR Documentation (Engineer Peer Reviewed).


C1D1 classification refers to an industrial space containing flammable or combustible liquids which requires certification according to the National Fire Protection Association (NFPA) 70 Standard in order to demonstrate compliance with applicable safety regulations. By obtaining this certification prior to using such a space for its intended purpose, businesses can not only ensure the protection of their workers but also demonstrate their commitment to responsible practices and workplace safety standards.

Ultimately, obtaining C1D1 certification is an essential part of protecting your business from potential liability associated with hazardous conditions posed by flammable liquids in your workspace. If you’re interested in more information on C1D1 or want to talk to our professionals about a C1D1 for your business, reach out to us today!

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