Practical guide

    Air flow measurements in ducts according to DIN EN 12599

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    Significance of air velocity

    Measurement of the right air velocity

    The right measurement location

    The measurement method

    Analysis of the measurement values

    The measurement report

    Ventilation and air conditioning systems

    Balanced ventilation systems

    Increasingly better insulated buildings with ever tighter shells mean that moisture and odours can no longer escape through joints. In addition, fresh air can no longer easily enter the house. This is where a balanced ventilation system (BVS) comes in: These ventilation-supported systems ensure an air exchange by introducing fresh air into the rooms and transporting used air, pollutants and odours away. This increases well-being and prevents moisture damage and mould:

    Indoor ventilation maintenance – here’s how it’s done

    Indoor climate measuring instruments and probes from Testo support you in all phases of a BVS: From the planning phase through the optimum adjustment up to regular monitoring of the performance – intuitively, precisely and taking legal conformity into consideration. Indoor climate measurement technology from Testo can of course be used not only for centralised, but also for decentralised indoor ventilation.

    Compact

    testo 440

    Determining volume flow and air quantity in a ventilation duct

    With the testo 440 and the suitable hot-wire or vane probe, you determine volume flow in a duct quickly and precisely.

    • Professionally commissioning and maintaining ventilation

    • Ensure efficient operation

    • Save measurement data and export for commissioning report

    testo 440 100 mm Vane Kit

    To the kit

    Testing air exchange rate at vents

    With the testo 440, a vane probe (Ø 100 mm) and the corresponding testovent 417 flow straightener set, you determine the volume flow at supply or output air vents simply and without error.

    • Ensuring the dissipation of room loads

    • Ensure sufficient fresh air supply and ventilation

    • Avoid draughts and noise formation

    testo 440 CO2 Kit

    To the kit

    Measuring humidity and temperature in rooms

    You record the air humidity and the air temperature in rooms in no time using the testo 440 and the suitable humidity/temperature probe.

    • Ensure a healthy indoor climate

    • Avoid mould damage

    • Protect building substance

    Adjusting balanced ventilation systems (BVS) – with Testo technology

    Choose your application

    Ventilation and air conditioning systems

    Ventilation and air conditioning systems use a lot of energy. However, they are indispensable for a pleasant room climate. Measuring instruments from Testo help you to control the systems efficiently in order to quickly achieve significant savings and ensure a comfortable climate in all rooms.

    For flow measurement in the duct and at the outlet, Testo offers you various measurement solutions - from small Testo Smart Probes to digital anemometers to multifunctional climate measuring instruments.

    To the overview
    Practical guide

    Measuring tasks on domestic ventilation systems

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    The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems.

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    In the event of malfunctions, send in your measuring device with a brief description of the fault. Please also include your telephone number in case of any questions. You will normally receive your measuring device back within one week.

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    Calibration

    Our subsidiary Testo Industrial Services supports you every day in ensuring quality and always complying with the relevant standards and guidelines. You will receive all the services required for this from a single source.

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