Hygienic facilities, often referred to as cleanrooms, are built around one primary objective: maintaining a tightly controlled environment that protects products, processes, and people from contamination. Cleanrooms have unique filtration and climate control requirements designed to minimize airborne particles and maintain precise environmental conditions. In many cases, the goal is to reduce airborne particulate levels to extremely low concentrations. Whether in pharmaceutical manufacturing, semiconductor fabrication, food and beverage processing, biotechnology, or healthcare applications, every material used within the facility must support cleanliness, reliability, and operational uptime.
Mechanical insulation is no exception
While insulation is commonly associated with energy efficiency and condensation control, it also plays an important role in supporting clean and hygienic environments. In critical spaces, insulation systems must maintain design temperatures while limiting airborne particulate contamination, withstand demanding operating conditions, maintenance procedures, and routine washdowns.
Understanding Hygienic and Cleanroom Environments
Many hygienic facilities and cleanrooms operate under strict environmental controls designed to minimize airborne particles and prevent cross-contamination. These facilities often regulate:
- Air filtration and airflow
- Humidity levels
- Pressure relationships
- Air changes per hour
- Surface cleanliness
- Washdown procedures
- Personnel protocols and gowning requirements
Cleanroom air cleanliness is commonly classified according to ISO 14644-1, an international standard that defines the allowable concentration of airborne particles per cubic meter of air. ISO classifications range from Class 1 to Class 9, with lower ISO numbers indicating fewer particles in a clean environment.
Because of these stringent requirements, building materials and mechanical system components are carefully evaluated for cleanability, durability, moisture resistance, and compatibility with hygienic operating conditions.
Why Insulation Selection Matters
Insulation systems used on piping, ductwork, and air handling equipment must do more than deliver thermal performance. In hygienic applications, insulation selection can directly impact condensation control, surface cleanliness, and the the harborage of contaminants.
Process Industry Practices (PIP) standards are often referenced when specifying insulation systems for hygienic and process applications. These standards guide insulation material selection, installation methods, and accessory requirements for controlled environments.
Factors such as operating temperature, substrate material, environmental exposure, and cleaning procedures all influence which insulation system is most appropriate for a given application.
Why Closed-Cell Insulation Performs Best in Hygienic HVAC and Process Piping Applications –
Closed-cell elastomeric insulation is often preferred in hygienic applications because of its low water vapor permeability and low water absorption characteristics. These properties help minimize the risk of vapor drive through the insulation system, often without requiring an additional vapor retarder.
This is especially important in chilled water, refrigerant, and cold process piping applications where condensation control is critical.
Although elastomeric insulation features an integral vapor-retarding smooth outer skin, protective jacketing is still required for systems that will be subject to washdown procedures. The most common insulation jacketing materials are PVC and metal (aluminum and stainless steel).
Closed-cell elastomeric insulation also offers several additional advantages for hygienic environments, including:
- Flexible construction that resists cracking and breakage when compared to rigid closed-cell insulations
- On-site field fabrication
- Fiber-free, non-particulating structure
- Thermal stability across a wide operating range
Reduction of both structure-borne and airborne sound transmission
AEROFLEX EPDM™ for Hygienic Facilities
AEROFLEX EPDM closed-cell elastomeric insulation is well-suited for hygienic facilities and controlled environments where reliability, low contamination risk, and cleanability are essential.
Its fiber-free, closed-cell, and non-particulating structure helps support cleaner HVAC and mechanical system installations in both manufacturing and R&D environments.
In addition to thermal and moisture-control performance, AEROFLEX® supports indoor air quality (IAQ) and occupant health through:
- GREENGUARD Gold Certification for low chemical emissions
- Compliance with EPA TSCA chemicals of concern
- Compliance with REACH substances of very high concern (SVHC)
- Compliance with RoHS (Restriction of Hazardous Substances)
- Naturally microbial-resistant: no biocides added (ASTM C1318, ASTM G21, UL 181 Section 13)
These characteristics make it a strong choice for facilities that prioritize cleanliness, indoor environmental quality, and long-term system performance.
AEROFLEX is available in pre-formed tubes, sheets, and rolls for a wide range of applications, including chilled water piping, VRF systems, HVAC, refrigeration piping, and duct liner & wrap.
To learn more, read our Technical Bulletin: AEROFLEX EPDM Closed-Cell Elastomeric Insulation for Hygienic Facilities
Sources:
Process Industry Practices – https://pip.org PIP INEG1000, Insulation Design Guide PIP INEG5000, Design Guide for Insulation in Hygienic Facilities
ISO 14644-1:2015 – https://www.iso.org/standard/53394.html Cleanrooms and Associated Controlled Environments
