Super simple and easy to install! I have two, I have 12 Lion's mane blocks in my tent and two of these running on a timer together. I installed one on the top back shelf blowing in and one on the bottom left shelf blowing out. I only have to run these on the lowest speed setting for 30 mins. My Lion's mane blocks love the added airflow. I have been running this for 30 mins about 4 times a day. This is a MUST buy if you are doing 5 or 10 lb blocks in these tents.

Good quality, will last. Running 30m every 3.5hrs in Monsoon, during Fruiting phase only, on high.

this is a nicer fan than i thought

Works great. Only need to run fan on low setting to push or pull air. Fan is very quiet on the lower settings.

Great add on, very universal and customizable. I would pick up an extra timer to run this but otherwise its very clever and simple solution to moving fresh air, if you need to!