Review on 🔄 Tjernlund PS1503 Airstat Pressure Switch for Improved SEO by Avery Sharma

I didn't even read the instructions as other Revain reviews said they were terrible. So you turn this thing upside down (so all the text is upside down) and the sensor goes through an 11/32 inch hole that you drill at the top. The foam pad will cover this hole so make sure it surrounds this edge like mine did. loosens up a little. You drill 2 holes on each side that match the holes in the bracket that the 2 mounting screws (flat head for some unknown reason) attach to. I used a permanent marker for the holes and started with a much smaller drill After installation I checked 2 clamps to ensure fan continuity and found the flow wasn't high enough. So I drilled a larger 11/32" hole through more channels. After that the unit had continuity with the fan on. There is no continuity with the fan off. Here's how it works. This is the 110V hot wire (black) on the "common". " bottom pin. This is a 110v switch on the center "open" terminal for your auxiliary fan. You connect the neutral wire (white) to the fan as usual and hot to the "open" terminal on this switch. The is everything. It opens the switch when there is adequate airflow and closes it when it stops. I hooked it up to an auxiliary fan in a flexible duct and it's still running when the AC or heat is turned on, so it's running 9 months now with no problems Works with no complicated wiring - a very useful switch for extra fans when the airflow into the room isn't strong enough And you don't need those programmable fans it seems logical to turn it on when the system is running, it's the only thing I know intended for that purpose. I had to fix my contractor's wiring (follow my instructions, it's not difficult). Obviously he couldn't figure it out from the labels on the device which I told him to ignore. For some reason neither contractors nor AC technicians had ever seen them before. They'd rather redo all your plumbing, add a bigger fan, and charge you a few thousand dollars. No thank you. Works perfectly!