Thougts about ISQ-F? See if you can find your answer here. If not, please contact our support.

  • What sensors are available and what are they for?
    Sensors ISQ-F:
    • Standard: Room temperature, Duct temperature, Presence (PIR), Air flow, Duct pressure (calculated), Opening degree of the valve, Engine power
    • Options in a plug-in module: Carbon dioxide, Relative humidity, Dew point
    • External via the I2C bus: Sound level meter for placement in suspended ceilings, Particle meter (PM1.0, PM2.5, PM4.0 and PM10). 
    Most sensors are used for their obvious purpose but also for calculationg valuable facts:
    • cooling effect (heat effect in case of overheated air) in the room
    • Heating effect in the room via radiator - calculated using the estimated effect on the radiator multiplied by output signal in%.
    • Number of people in the room - calculated using built-in sensors (+/- 15%) in accuracy with about 15 min delay
    • The room's occupancy rate and usage pattern - with a presence detector and people tracker, data together with communication with the room's booking system can be compiled to get a complete analysis of how many people usually use the room and how it is booked. This is an important basis for decision-making for continuous evaluation of how the premises are used in the best way.
  • Do all sensors function as well in the diffuser as when wall mounted?

    The placement of sensors in the diffuser eliminates the installation cost and increases the flexibility of the room. It is also the best placement of the donors for several reasons. When the air flows in along the suspended ceiling, an upward air flow is created with room air under the device, which creates a relevant measuring point for the built-in sensors.

    • Temperature sensor - measuring temperature on the wall requires long time constants because it shows correctly only when the wall has the same temperature as the room. It is not uncommon for time constants up to 30 minutes to do this. The measurement in the device has a time constant of about 5 min. The temperature gradient from 1.2 m to 2.4 m in height is about 0.3 degrees, which is significantly less than the difference between the person and the normal position of a room sensor on the wall by the door, especially if the door is open.
    • Presence sensor - has an advantageous location compared to the wall as it registers everything from above and is not blocked by furniture, plants or the like.
    • Carbon dioxide and moisture - measures the room air through one of the larger grooves in the plate. The sensor is placed under a hermetic cover so that it is not affected by the fresh air in the box.
  • Why Bluetooth and why/how to use it?

    Bluetooth® is only used for communication between our devices and selected devices, so-called "peer to peer". Thus, we do not interfere with other functions on 2.4 GHz, such as wifi. Examples of selected devices are:

    • Commissioning with the app LINDINSIDE. 
    • Beacons for indoor positioning with 3rd party app. These can also be used for "People & Asset tracking". The advantage of using our beacons is that they have a power supply. We can very easily activate or deactivate the Beacon functionality. 
    • Controlled electrical outlets - Bluetooth® electrical outlets that are connected to the presence detector in the room to minimize electricity consumption when the room is empty. (Coming soon)
    • Window contact - Bluetooth® magnetic contact that sends a message to the device that the window is open, the device then stops cooling / heating the room. Can also be used for alarm function. (Coming soon)

    Bluetooth® functions can be deactived after commissioning if desired.

  • Does Bluetooth interfere with Wi-Fi?

    Our products are silent and only listen and answers to calls from the app LINDINSIDE. This does not interfere with Wi-Fi at all. There are some upcoming applications that have a different communication principle but these are optimized to not interfere with Wi-Fi

  • Which diffuser should I chose, ISQ-F or ISQ-FM?
    • With all built-in sensors and room control, ISQ-F has a built-in flexibility in case you want to change the room division without changing the ventilation system.
    • ISQ-FM are intended for larger areas without a greater need for flexibility requirements.
    • If you only compare product prices, it will be cheaper with ISQ-FM and dampers instead of ISQ-F when 3 ballasts or more are needed. In terms of flexibility, simpler duct routing and fewer ducts, it's basically just school halls and larger meeting rooms where ISQ-FM is a better alternative.


  • Is it possible to paint ISQ-F to match the interior design?

    Absolutely! BUT let US do it! We make sure that you get the color you want so that the devices are painted in a safe way that does not destroy them. If you do this on your own, the function is destroyed and the guarantee does not apply.

ISQ-F - Exposed active supply air diffuser

ISQ-F is an exposed active supply air diffuser intended for demand-controlled ventilation. The device is designed to individually or in collaboration with several devices deliver air volumes that vary with the activity level or other climatic factors in individual rooms. Demand-controlled ventilation minimizes energy use and creates an optimal indoor climate where it is needed.

The device is available in a raw industrial look or lacquered in the desired color. ISQ-F is part of Lindinvent's product range INSQAIR, a generation of supply air diffusers with accessories that are launched with Bluetooth® functionality and a range of technical solutions that further increase the usability and performance of Lindinvent's climate control system.

The product is developed with a focus on simplicity at all levels but also maximum flexibility and digitization. All necessary sensors and Bluetooth® makes ISQ-F a smart and quiet supply air diffuser that equips the property for future requirements in all respects. 

Quick facts ISQ-F:
  • Complete & flexible climate control in offices, healthcare and schools.
  • Ballast with built-in room regulator and motor-controlled air flow valve.
  • Built-in sensors for room & duct temperature, air flow, static pressure, presence, brightness and degree of opening.
  • Options: CO2, VOC, RH and sound level.
  • Exceptional flow and sound performance. Up to 120 l / s with sound level <30 dB (A), up to 1.2 kW cooling power with 8 K sub-tempering.
  • Adjustable self-acting variable gap opening for maintained outlet speed even at low air flows.
  • Connected via network to parent system with the web tool LINDINSPECT.
  • Bluetooth® for communication with peripheral products and smartphone with the app LINDINSIDE.
  • Inspect and adjust temperature etc. with qr code and app.
  • A quiet device even at high flows.
  • Swift and easy installation.

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