Retrotec Blower Door for residential building testing

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EU300X-E Passive-House System

Brand: Retrotec
Product Code: EU300X-E

Most accurate Passive-House system

Nothing has ever been built with so much flow measurement innovation. More power, less weight, and the ability to run for hours on batteries.

Who uses it?

  • Energy Auditors, HVAC Contractors, Building Contractors & Remodelers, Home Inspectors

Why Buy This Model?

  • Ideal for small, tight houses and apartments or ducts.
  • Engineered square corners on the door panel make this system 75% tighter than any other, making this the perfect Passive House system.
  • Aluminum Frame has quick connect injection molded corners that decrease set up time with our snap together, snap apart frame while reducing leakage by 75%.
  • The flow nozzle and centrifugal fan measure extremely accurately from 3 to 0.03 Air-changes per Hour at 50 Pa.

Fan Model #



Flow Into:


Maximum Flow

Free Air


25 Pa


Minimum Flow

Range 102 - Standard


Range 74 - Standard


Range 47 - Standard


Range 29 - Standard


Range 18 - Optional



Range 11 – Optional



35.5 x 32 x 37 cm


5.5 kg

Flow Accuracy

+/-3% ISO 17025 accredited certificate available

Power Supply

Input: 240V/50Hz

Output: 48V DC/ 3.31A

Power Output

0.213 hp, 159 Watts

Maximum Fan Calibration Interval

Every 5 years or sooner depending on standard

Digital Gauge Model


* The max flow of the fan will vary depending on the following factors: barometric pressure, back pressure, blade pitch, air temperature, bearing tightness, inlet air turbulence, length of flex duct 


* 5000/6000 series blower doors DO NOT work with the DM-2 digital gauge