,steer clear of any non variac ones if you have a fan bigger than 100mm as they hum like crazy and damage motors so worth the extra expense imo,good luck
not all. im running 5 areas with non variac ones, running 4 inch to 6 inch extraction fans, all black orchid, no hum, been running these also for over 5 years, from way back as far as 2014.
You can even use the box the fan comes in as a muffler box as they have put cut outs in the end.
The variacs are the real deal tho, compatible with all fans, got a pal looking into making some as the money they charge is a insult for what they actually are.
Edited by NemesisOne, 21 October 2020 - 12:26 AM.