Example of realization

Blower Door test

Test of airtightness of the envelope

We perform the airtightness test of the envelope of buildings and apartments using the so-called Blower Door test. We perform the measurement in accordance with the standard ČSN EN ISO 9972. We are registered in the list of professional suppliers of the project Nová zelená úsporám.

Logo of the project Nová zelená úsporám
Example of the technology used for the measurement in a door

When is the test performed

The Blower Door test is primarily required for passive and low-energy houses. The test is recommended to be performed during the construction of the house, after the windows and external doors have been installed, when it is relatively easy to fix the detected leaks.

What the Blower Door test includes

  • preparation of the building
  • possible sealing of air leakage points, waste, etc.
  • own test performed under a negative pressure of 20 to 75Pa
  • the output of the measurement is a protocol containing the determination of the n50 value for the measured object (example of the measurement protocol for download HERE)

What will we need from you

Documents for determining the internal volume and floor area of the building, e.g. project documentation, protocol from a previous test, etc. If there is neither, we will measure the volume on site.

Information about accessibility of the intake and exhaust ventilation, whether we need to bring a ladder and how long it should be. The ventilation duct must be sealed during the test.

Readiness of the building

Where we perform the test

We also perform tests in apartment buildings or industrial facilities, where more measuring units are needed.

Showcase of blower door test realizationShowcase of blower door test realizationShowcase of blower door test realizationShowcase of blower door test realizationShowcase of blower door test realization

Detection of air leaks

We also offer detection of air leaks. Air leaks can be detected using various tools. In addition to the initial detection using the hand, we use detection using an anemometer, smoke generator and thermal imaging.

Measurement using a smoke generatorControl of airtightness of ventilation ductsMeasurement using an anemometerMeasurement using thermal imaging
Icon of success

For the correct operation of the ventilation system, it is important to install it correctly. The measurement performed by the specially designed Minneapolis DuctBlaster device will check the quality of the installation of your ventilation ducts.

Icon of tools

We will advise you how to fix and seal the air leaks.

Pricing

The pricing may be outdated, so take it more as an indicative and for the exact pricing contact us.

Item

Price

Blower Door test including the protocol for NZÚ

4400 Kč/object

Blower Door test without the protocol

2900 Kč/object

Blower Door test for larger objects and apartment buildings

individual price depending on the scope of the measurement

Control of ventilation ducts

5000 Kč/family house, larger objects individually depending on the scope of the ventilation system

Detection of air leaks over the foundation 2 hours

400 Kč/h

Consultation on the project, fixing air leaks etc.

400 Kč/h

Transport

7 Kč/km, minimum 400Kč

Zelené stavění logo

Copyright © 2010-2025 Zelené stavění | All rights reserved.

Privacy policy