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The ndd Medical EasyOne Filter FT (#2091-422) is specially designed for use with the FlowTube mouthpiece only. It helps ensure highly accurate test measurements and keeps the ambient environment clean while the ndd mouthpiece protects from cross-contamination.


ndd Medical EasyOne Filter FT Features

  • Helps keep the environment clean for both patients and healthcare professionals.
  • Meets the 2019 ATS/ERS spirometry standards for accuracy.
  • Provides an optimal fit which leads to minimal resistance and high-quality results.
  • Enjoy optimal filter efficiency and accuracy.
  • Utilizes unique and innovative technology (patent pending).


ndd Medical EasyOne Filter FT Specifications


  • Dead Space: ≤ 60 mL. 
  • Resistance: ≤ .5 cm H2O.
  • Waveform Test: Passes ISO 26782 waveform testing required by ATS/ERS (2019).
  • Filter Properties (Tested at Nelson Labs US):
    • Bacterial Filtration Efficiency (BFE): 99.99%.
    • Viral Filtration Efficiency (VFE): 99.99%.
  • Weight: ≤ 28 g.
  • Dimensions: 8 cm x 8 cm.

Filter Pad

  • Material: Electrostatic fibres.

Filter Materials and Additives

  • Compliant With: REACH regulations.

Filter Types

  • Compatible With: EOA firmware V1.18.x or higher. EOC software V3.9.3.x or higher.

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