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.
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
- Completed airtightness layer, all window and door frames installed
- For the final test: installation of appliances that affect airtightness (heat exchanger, fireplace, kitchen hood, etc.)
- More information in section 6.3 of the Methodological instructions
Where we perform the test
We also perform tests in apartment buildings or industrial facilities, where more measuring units are needed.
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.
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.
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The pricing may be outdated, so take it more as an indicative and for the exact pricing contact us.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
