For almost three years I have been using a homemade home ventilation unit (https://ammo1.livejournal.com/1023738.html). I came to the idea that I want to do the second. :)
I choose a fan.
My installation of the second version drives air from the street into two rooms at once. I wanted to make controlled dampers so that air only goes into the room where someone is (even I bought servos on Ali), but came to the conclusion that it is better to make a separate installation for each rooms.
When the first version of my ventilation only supplied air to one room, it was practically silent. Now, when air is supplied to two rooms, the noise is clearly audible (the fan speed had to be increased so that there was enough air for two rooms).
The two units will be quieter and easier to automatically control.
In my installation there is a Lissant VK125B duct fan (now it seems that this manufacturer does not exist either). This fan has a capacity of 320 m3 / h and hums like an airplane. I use it at a reduced voltage (still lowering the voltage with a LATR). At a voltage of 100 volts, it gives 60-80 cubic meters per hour and is almost silent.
A similar fan now costs about 4,000 rubles, and I thought maybe using an initially quieter fan. Soler & Palau (S&P) has a series of Silent duct fans (quiet types). The cheapest TD-160/100 SILENT costs about 6,700 rubles.
For S&P, the first figure is the air flow per hour (in this case, 160 m3 / h), the second figure is the diameter of the duct. The next model TD-250 / 100-125 SILENT costs about 9800 rubles and differs not only in high consumption air and the presence in the set of branch pipes for air ducts 100 and 125 mm, but also an advanced system noise suppression.
All fans have two speeds (power is connected to one or the other pin). Most likely, it is possible to fully smoothly regulate the speed only by changing the voltage, that is, with the same LATR.
TD-160/100 gives 180/150 m3 / h and makes 24/22 dBa noise at a distance of 3 meters. TD-250 / 100-125 gives 250/200 and 25/20 dBa.
So I think which of them will be quieter when slowing down to 60-80 m3 / hour? Or maybe take exactly the same-looking Ukrainian Vents at half the price?
© 2020, Alexey Nadezhin
The main topic of my blog is technology in human life. I write reviews, share experiences, talk about all sorts of interesting things. My second project - lamptest.ru. I test LED bulbs and help figure out which ones are good and which are not so good.