Some people prefer to have a stove more silent, which can be a desire in general or in specific situations. Optimus does not provide silencer for it's stoves by itself, neither recommend using it.
If you like to add a silencer to your either Polaris or Nova(+) stove, you can checkout manufacturer as follow:
We recommend to checkout some videos on YouTube before purchasing and to make sure that fuel type is used in line with recommendations of Optimus & the third-party manufacturer.
Optimus does not partner with the above mentioned manufacturer and does not give warranty on their products nor take responsibility for any damage resulted in use with Optimus products. Optimus does not recommend the use of a silencer & only provides information for those interested.