Enjoy a silent stove thanks to the Sûti SILENT MODE !
Apart from its inaudible Brushless auger motor, SÛTI presents a fan that can be disengaged in powers 1, 2 and 3.
You therefore benefit from complete silence 95 % of the time!
Sûti, your silent stove
All our models have an average sound level of 34dB.
Where are Sûti stoves on the decibel scale?
Sûti offers you a synthesis of the sound levels of different stoves tested by independent organisations. In order to make the readings more meaningful, we will use the noise scale on the left and compare them with noises that can be heard in everyday life. The observations mentioned in front of the noise level are obviously subjective, as acoustic comfort is specific to each person. They correspond to the feelings of a person who is rather sensitive to noises.
Important note about dB
Sound is the result of an acoustic vibration, a rapid variation in air pressure picked up by the eardrums and transmitted to the brain, which interprets it. Sound is characterized by its intensity, or sound level, which is measured in decibels; its pitch, or frequency, which is measured in Hertz; its timbre, or colour of sound; and finally its duration.
Adding 3 dB is equivalent to multiplying the sound intensity by two, while removing 3 dB divides the sound intensity by two. So an addition of 10 dB is equivalent to multiplying the sound intensity by ten.
Noise from a pellet stove: 3 determining factors
Before comparing the noise level of pellet stoves, here is a summary of the main factors that influence acoustic comfort. They are listed in order of importance.
First of all, the blowing noise. This noise is directly proportional to the fan speed of the motor that propels the heat and can be tiring if listened to for long periods of time. Stoves with natural convection (without a blower) are therefore at a great advantage from this point of view. Conversely, ducted stoves with one or two fans are noisier.
Sûti has found a solution and developed a heating body that can work without a fan, i.e. the fan can be switched off on powers P1, P2 and P3 , which corresponds to 96% of the stove's operating time. In P4 and P5, the very quiet fan will run to heat the room faster. Thanks to this system, Sûti is both very quiet and is able to heat quickly when needed.
Moreover, Sûti has a 100 mm diameter smoke outlet, which makes the draught of our stoves 50% more efficient than the 80 mm diameter. This results in a 50% reduction in the speed of the extraction motor and therefore increases the lifespan of the part, but also greatly reduces the noise! In addition, our extraction motor is located on a cast aluminum smoke snail, which greatly reduces the noise of the smoke snail.
Then the sound of the auger/screw. The auger moves the pellets from the tank down to the hearth. Its rotation is more or less silent.
Sûti has opted for a Brushless auger motor, so that there is no motor noise.
Then, the sound of the pellets as they fall into the crucible (from the auger to the hearth). This sound is more or less resonant.
The last factor to consider is the sound of the pellets falling into the crucible.
There are 2 possibilities directly related to the crucible material (burner):
- Sûti opted for a cast iron crucible: This material attenuates the noise of the fall, which causes a dull sound without resonance ("tac, tac, tac").
- Unlike steel crucibles: This material causes a crystalline sound that resonates when in contact with the pellets, which results in a rather metallic sound ("Gling, Gling, Gling").
In addition, there are also expansion noises (due to temperature changes), flame noises or whistling noises that are normal and difficult to quantify. Finally, it is important to install your pellet stove properly: the air intake and an insulated chimney are essential for good results.