I recommend HRM Fan from myself. I'm a zwift man, I ride a lot, ultimately an ultra-cyclist, and good ventilation is essential. The fan does not need to be set up and changed every time. I have a really strong fan and it blows like crazy, so an external control by heart rate is otherwordly.

HRM FAN !!!
The fan control system for less than a million coins. Plug the device to a wall socket, plug the fan to the device,  connect through the app on the phone and set the intensity of blowing at your Heart Rate!!
It couldn't be easier !!
I recommend it big time!!

For "blowing too strong or too weak" I recommend HRM Fan. The perfect device for solving problems with improper cooling.

About HRM Fan: "It works very cool, very useful thing on Zwift. I was thinking of buying a Headwind, but it  works fine."

https://www.youtube.com/watch?v=yN7NJYQzIi4

Hrm Fan is great. I still have a test version from last season. It's a device like "how could I live without it".

The solution is brilliant. So far my approach to indoor training has been difficult and bumpy, and every reason not to do it was good. Since owning HRM Fan, I liked not only easy rides but also intervals. The simplicity of operation and intuitive configuration definitely encourage the use of this solution. I recommend.

What I love the most about cycling is the space, views and a breeze. Can it be done at home? Yes! Zwift, spare room in the basement, projector and…. HRM Fan. I can't imagine training without it. A gentle breeze when I'm riding light and a strong wind when pushing hard during  intervals. I just recommend it.

Polish “Pimp My Ride” for the smelting cave, this gadget frees up your head from the control of the fan and provides thermal comfort from A to Z. I checked compatibility on two Android phones, three heart rate monitors working on Ant+ and Bluetooth - no unpleasant surprises. A solid case and a flawlessly written application. Lots of flavours in the choice of the operating mode of the fan. My favourite is the one divided into Warmup | Training | Cooldown. Does the job. Equipment for everyone who would like to get more comfort while working out on a trainer. Respect for the creator! I recommend with all my heart. ***** 5of5 Stars

HRM Fan - a sensational device thanks to which hard workouts are definitely more pleasant and exciting. HRM Fan after being connected to a fan interacts with your heart rate monitor. The fan speed adjusts to the current heart rate level. In order to make the training more attractive and visualize the current effort, the application allows you to connect to external RGB LEDs without the need for adjustments or additional settings. The color of the LEDs indicates in which heart rate zone you are currently training, and the speed of the fan cools the body down depending on the needs! Training with HRM fan is a great thing and pure pleasure - money well invested 🙂 and definitely less sweat!