PureFlow 200 EPP Filter Box for General Indoor Ventilation and Controlled Indoor Farming Systems

PureFlow 200- EPP Filter Box -  Built for Challenging Climates

EPP Filter Box for Ventilation Systems – Advanced Air Filtration for Every Space.  Upgrade your air quality with the PureFlow 200 EPP Filter Box, designed for use in ventilation systems with or without heat recovery. And yes duct connection adapters DN200/DN160, 8'’/6” are included.

Your air is a choice. What will you choose?

This filter box accommodates up to three filters, allowing for flexible combinations to achieve optimal filtration of incoming outdoor air. Use a pre-filter (ISO Coarse 75% / MERV 8) for large particles, an F7 ePM1 60% (MERV 13) filter for fine dust and allergens, and a Carbon 250g F7 (ePM2.5 65%) filter to effectively remove odors, VOCs, and harmful gases.
Manufactured from expanded polypropylene (EPP), the filter box provides outstanding thermal and sound insulation, requiring no additional insulation and minimizing installation costs. Its lightweight, durable construction makes it perfect for residential, commercial, healthcare, industrial, and transportation applications.
Key Features:
  • Compatible with DN200 and DN160 (8”/6”) duct connections
  • Holds up to three filters: ISO Coarse 75% / MERV 8, F7 (ePM1 60%), carbon (ePM2.5 65%)  for indoor farming application
  • Excellent thermal and sound insulation with EPP material
  • Minimal air leakage and pressure drop
  • Easy and quick filter replacement (recommended every 3–6 months)
  • Suitable for apartments, offices, healthcare facilities, industrial kitchens, and more

  • Optimized for Diverse Climates:

    • Coastal & Tropical (e.g., USA, Southern Europe): Prevents humidity buildup during high AC usage.

    • Moderate & Cold (e.g., Northern & Central Europe): Eliminates condensation when warm indoor air meets cold outdoor intake in winter.


  • Complies with ISO 16890 standards

  • Condensation Resistance: Fully insulated EPP housing prevents dew point formation in R.H. up to 90%.

  • Hygienic Material: Non-porous, anti-microbial surface that does not support fungal growth (DIN EN ISO 846 compliant).

Advanced Moisture & Mold Control

Stop Mold Before It Starts

Whether it’s the humid summers of New York and Florida or the damp winters of Northern Europe, moisture is the enemy of any ventilation system. Traditional metal filter boxes are prone to 'sweating' (condensation) due to thermal bridging.

The PureFlow 200 is built from high-density EPP (Expanded Polypropylene), providing seamless thermal insulation. This eliminates the temperature difference that causes condensation inside the box, keeping your filters dry and preventing mold spores from developing. It’s not just a filter box—it’s a safeguard for your indoor air quality.

Comprehensive Filtration for Every Need:
  • Removes large particles (dust, sand, hair, ash)
  • Captures pollen, mold spores, and fine dust (PM1, PM2.5)
  • Adsorbs odors, VOCs, formaldehyde, and smoke
  • Provides protection against bacteria and some viruses
Perfect Pairing with GHT Geothermal Preconditioning Units:
For maximum energy efficiency and air quality, combine the GHT EPP Filter Box with GHT Geothermal Preconditioning Units. This integrated solution not only filters but also pre-heats or pre-cools incoming air, reducing energy consumption by up to 64% and ensuring a healthy indoor environment all year round.
Choose PureFlow 200 EPP Filter Box – the smart solution for clean, energy-efficient, and comfortable indoor air.

Technical information

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Installation manual