@BenN I made a wall adapter for my M9+ and that improved airflow and cooling, see https://community.tp-link.com/en/home/forum/topic/206960?replyId=468658

@Monsterfj I have been using the M9+ with 3 units for 6 weeks using the 1.2.11 firmware. I have a 500/500 fibernet connection and using the Deco as router. Everything is rock solid, I have not...

@MarkoJ Yes I believe the same, the main Deco gets hottest, but I have not done extensive testing. One other unit that is heavily used is connected with a 20m CAT6 cable. It gets warm, but not...

@SrDarkWarrior The airflow around the unit is much improved if the Deco is wall mounted. Improved airflow means improved cooling. I also found it was more convenient to mount the main Deco on the...

@TP-Link_Deco Thank you, this is welcome news. My Deco M9+ mesh is using the same channels as my neighbours, even though Androids "network analyzer" shows many other channels unused (rural area)....

@TP-Link_Deco Will it be a requirement to first install the current 1.4.0 firmware using the released upgrade tool in order to be able to upgrade via Deco app later in the future?