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    Measurement solutions for air conditioning and ventilation technology

    For an optimum indoor climate and better energy efficiency.

    Ventilation and air conditioning systems consume 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.

    Reliable indoor air quality and thermal comfort measurement

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    Additional climatic factors for an optimal indoor climate

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    Every flow measurement under control - in ducts or at outlets

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    Ventilation and air conditioning systems

    Flow measurement with Testo:

    convenient, precise, reliable.

    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.

    Discover the suitable measurement solution for your individual requirements.

    Professional, standard-compliant, and convenient determination of the volume flow

    With the testo 400 universal IAQ instrument.

    The testo 400 is a multifunctional air velocity & IAQ measuring instrument that allows you to measure volume flows in ducts and outlets efficiently, intuitively and in compliance with EN ISO 12599 and ASHRAE 11:

    • Intuitive measurement programs, incl. HVAC grid measurement

    • Convenient measurement

    • Efficient data management

    • Intelligent calibration concept

    Overview of our product recommendations for you

    Compact

    testo 440

    Multifunctional testo 440

    Measure 7 parameters with one device - testo 440

    Professional

    testo 400

    The universal air velocity & IAQ measuring instrument testo 400

    One measuring instrument for all climate-related parameters

    Light:

    testo 420

    testo 420 volume flow hood

    Uniquely light and ideal for measurements at large outlets

    Choose your application

    Measurements in the ventilation duct

    Maintaining the air flows in the ventilation duct is crucial for the function of the ventilation and air conditioning system. If the air flows are lower than planned, the removal of room loads (heating, cooling and material loads) may not be guaranteed under certain circumstances. Therefore, it is particularly important to ensure the most accurate possible measurement of air flows.

    Testo offers you numerous measuring instruments that are particularly suitable for measuring in ducts and air conditioning systems.

    Practical guide

    Air flow measurements in ducts according to DIN EN 12599

    Download the exclusive practical guide for free now.

    Go to download

    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

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    testo Smart App

    One App for all applications

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

    New feature:

    Professional measuring programs for increasing the efficiency of your applications

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    Multifunctional

    Compatible with all Bluetooth-enabled Testo measuring instruments

    Efficient

    Direct report dispatch by e-mail

    Fast

    All measurement values at a glance

    Easy

    Intuitive measurement menus

    Clever

    Free download, free use

    NEW

    Professional measuring programs

    Our services

    Contact

    Do you have any questions or would you like a personal consultation?
    We would be more than happy to help you.

    Customer services

    In case of malfunctions, send in your meter with a short description of the error. Please also include your telephone number for any queries. Normally you will receive your meter back within one week.

    Calibration

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