Why is Expanded Polypropylene (EPP) a good choice for Insulation in Ventilation Systems?

Expanded Polypropylene, or EPP, is a synthetic material with various applications. It’s worth noting its insulating properties, both in terms of thermal and acoustic insulation. This makes EPP suitable for use in ventilation systems.

EPP in insulation and ventilation system

Basic Information and Key Advantages of Using EPP in Ventilation and Air Conditioning Systems 


EPP (Expanded Polypropylene) is an expanded material that has been gaining popularity in various industrial sectors for many years. The material is created by subjecting propylene to high temperatures, resulting in a flexible form. This provides extensive shaping possibilities for EPP, making it suitable for creating various components for many industrial sectors.

EPP finds its applications in HVAC (Heating, Ventilation, and Air Conditioning) systems, automotive industry, furniture manufacturing, sports accessories production, and many more. 

What drives the widespread use of EPP in such diverse industries? Primarily, it’s attributed to numerous beneficial technical properties, especially its resistance to external factors. Notably, EPP is an exceptionally durable material that doesn’t undergo permanent deformations even under heavy loads. Simultaneously, it has a very low weight, which translates into advantages concerning transportation, storage, and energy consumption during the production process.

Other advantages of Expanded Polypropylene include its chemical neutrality, which helps prevent the growth of fungi and microorganisms. This is particularly significant in the HVACR (Heating, Ventilation, Air Conditioning, and Refrigeration) systems field, where EPP is also valued for its acoustic and thermal insulation properties. 


Thermal and Acoustic Insulation in Ventilation 


Insulating ventilation systems is one of the many applications of expanded polypropylene. EPP performs well in this task primarily due to its very low thermal conductivity coefficient (0.039 W/mK). This prevents warm air from escaping rooms, resulting in higher efficiency of ventilation systems and heat recovery units.

Combined with its low weight and 100% recyclability, EPP is an optimal choice that aligns with the trend of thermal omodernization and modern construction, focusing largely on reducing the environmental impact of structures. However, this is not the only advantage of EPP in the context of HVACR (Heating, Ventilation, Air Conditioning, and Refrigeration) systems. Attention should also be drawn to the potential that expanded polypropylene exhibits as acoustic insulation for ventilation. This material effectively dampens noise, significantly increasing the comfort of using various devices. This aspect is one of the crucial challenges for HVAC system manufacturers who need to comply with strict regulations as well as end-consumer expectations.  


Health Benefits of Ventilation with EPP Duct Systems 


In the context of ventilation insulation, it’s worth mentioning other advantages of expanded polypropylene. This material is corrosion-resistant, making it a favorable alternative to traditional materials used in HVAC equipment construction, primarily steel.

The operation of such systems involves the presence of humid air and the formation of condensation, which can threaten the components of devices, creating the risk of microbial growth. EPP addresses both issues; it is resistant to moisture and biologically neutral, maintaining optimal conditions in ventilated spaces. Components made from EPP used in mechanical ventilation systems (heat recovery) include enclosures, piping, and distribution boxes. It’s important to emphasize that this is a highly moldable material, allowing for the preparation of elements of nearly any shape and purpose. 

Alnor's EPP duct system


Expanded Polypropylene in HVACR Systems 


EPP finds application not only in ventilation but also in other components of HVACR (Heating, Ventilation, Air Conditioning, and Refrigeration) systems, including devices responsible for cooling, air conditioning, and heat recovery. In each of these industrial sectors, the high thermal and acoustic insulation properties of expanded polypropylene, as well as the material’s durability and very low weight, can be greatly beneficial.

Importantly, EPP consists of approximately 95% air, resulting in its low weight. This allows for the efficient and eco-friendly operation of HVACR devices without unnecessary burden. The material’s lightweight nature also leads to more cost-effective transportation, both for delivering components to the manufacturer’s headquarters and when passing devices to end customers. The relatively low weight of the equipment contributes to its ergonomics and ease of installation by installers, making it an additional argument in favor of EPP’s choice by HVAC industry equipment manufacturers. 


Insulation of Ventilation Ducts and Heat Recovery Insulation with Knauf Industries 


Knauf Industries’ offerings meet the requirements of numerous industrial sectors, including HVACR equipment manufacturers. Our proposals include solutions for insulation components made from expanded polypropylene. The primary production method employed by Knauf Industries is foam shape molding, allowing us to prepare components precisely tailored to specific applications. We prioritize high-quality craftsmanship and efficient production, carried out in our facilities using advanced, modern machinery. 

EPP recuperator from Alnor


Custom EPP Insulation Solutions for HVAC Projects: Expert Design Support by Knauf Industries 


In addition to the remarkable properties of Expanded Polypropylene in HVACR systems, a significant aspect of our offering at Knauf Industries lies in our dedicated design support capacity. We understand that each HVAC project comes with its unique set of challenges and requirements. That’s why we are committed to working closely with our customers, providing tailored insulation solutions that align perfectly with their specific needs.

HVAC solutions

Our team of experts leverages their deep knowledge and experience in EPP applications to develop innovative, efficient, and custom-fit solutions for every project. Whether it’s optimizing thermal and acoustic insulation or addressing unique spatial constraints, we ensure that our EPP-based solutions enhance the overall efficiency and performance of HVAC systems. Our approach is not just about supplying a product; it’s about partnering with our clients to co-create solutions that push the boundaries of what’s possible in HVAC technology, delivering results that are as sustainable as they are effective. 

Get in touch with our team!


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