PMV/PPD

A person's sense of well-being in a room (level of comfort) depends on a series of particular external influencing factors. For example, people are extremely sensitive towards thermal radiation caused by cold walls or windows. We also respond to draughts in a room with thermal discomfort. Thermal comfort is defined by the following main influencing factors: indoor air temperature and radiation temperature, air velocity, relative humidity of the indoor air.In turn, the effect of these main influencing factors on a person's sense of comfort depends on his or her (level of) activity and clothing.

The international standard ISO 7730 combines all of the parameters in the PMV/PPD measurement (Predicted Mean Vote/Predicted Percentage Dissatisfied). The PMV is an index which predicts the average climate assessment value of a large group of people. The PPD Index provides a quantitative prediction of the number of people that will be dissatisfied with a certain ambient atmosphere.

3 products or recommendations for PMV/PPD
  • testo 400 - Universal IAQ instrument

    Order-Nr. 0560 0400

    The testo 400 is the universal measuring instrument for all IAQ professionals. Measure, analyze and document all IAQ and comfort level parameters using just one instrument – simply, conveniently and in compliance with the standards. High-quality measuring technology, intuitive measurement assistants, versatile documentation options and a comprehensive selection of IAQ probes make the testo 400 the perfect partner for your day-to-day work.
    • Smart, intuitive measurement programs including HVAC grid measurement as per EN ISO 12599 and ASHRAE 111, PMV/PPD and turbulence as per EN ISO 7730 and ASHRAE 55

    • High-precision, location-independent and integrated differential pressure sensor

    • Measure all IAQ-related parameters – with our wide range of probes for all IAQ measurements

    • Document measuring values directly on the customer's site and send them by e-mail, or further analyze them using the testo DataControl PC software

    Price on Request
  • testo 400 IAQ and comfort kit with tripod

    Order-Nr. 0563 0401

    Ideal kit for IAQ professionals, with a focus on indoor air quality and comfort level. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one CO₂ probe (with Bluetooth® handle), one turbulence probe and one globe thermometer Ø 150 mm (both with fixed cable). Use the measuring tripod to ensure standard-compliant positioning of the probes. In combination with the IAQ data logger, which is available to order separately, long-term measurements up to 2 weeks can be recorded, even without the IAQ measuring instrument.
    • Standard-compliant determination of the comfort level: PMV and PPD as well as draught and turbulence as per EN ISO 7730 and ASHRAE 55

    • Monitor the indoor air quality: Determination of CO2 concentration, humidity, air temperature and turbulence in workplaces, including long-term measurements

    • Smart, intuitive measurement programs, complete your measurement with full documentation on site at the customer’s premises or carry out further analysis using the testo DataControl measurement data management and analysis software

    • In the kit: testo 400 universal IAQ instrument, CO2 probe (with Bluetooth® handle), turbulence probe with cable, globe thermometer (Ø 150 mm) with cable, measuring tripod with bag, case

  • IAQ data logger for long-term measurements

    Order-Nr. 0577 0400

    For long-term monitoring of the indoor air quality: Use the IAQ data logger as a stand-alone measuring unit for carrying out long-term measurements with the testo 400 IAQ measuring instrument. While the stand-alone data logger is carrying out the IAQ measurement, you can use the IAQ measuring instrument for measurements elsewhere.
    • Data logger configurable via testo 400 universal IAQ instrument

    • Compatible with probes for measuring the comfort level, turbulence, radiant heat, CO2, CO, illuminance, air flow velocity, humidity and temperature

    • Stand-alone data logger for long-term measurements up to 2 weeks

    • Connect up to six fixed cable probes at the same time

    $1 581.00
    incl. GST  $1 739.10
3 Products found