$20 DIY Shop Fan & Air Filter 

This the cleanest looking HVAC blower to shop fan conversion . Good job 👍

Best HVAC air handler to shop fan conversion I’ve ever seen. Thanks for sharing!

Nice project for sure. For those wanting to build this, make sure you don't pull a 3 phase motor commonly found in commercial units unless you have 3 phase power available, also for those not familiar with HVAC motors, these motors are 240 volt, and usually a minimum of 2 speeds, usually 3 in residential, and 4 if it came from a commercial unit, one leg is common which you would wire directly to one side of the cord, and then connect the wire for the speed you desire to the other leg of the cord, each motor is different, but typically red is low speed, blue is medium, on a 4 speed, you'll have a yellow which is another "middle range" speed, and black is high, it doesn't usually matter which of the power leads on the cord goes to common and which goes to the desired speed wire(s) since both are hot wires on 240v. On the motor shell (and on the unit the fan came out of should have a wiring diagram with each speed color, you'll also have 2 wires going to the run capacitor, usually both are brown or grey, again refer to the wiring diagram to be certain. I mounted a simple "handy box with a clamp for the cord and a blank cover I drilled a hole in to mount the rotaty switch in the links below on one of my blower fans, this gave me the option to use all of the speeds and turn it off as well. I highly recommend installing breakers or fuses as well, 5 amp is usually plenty, but again check the amp rating on the motor to be sure, the one in the links below will work, you'll need 2 since it's 240 volt, be sure to install them inline between the cord leads and the blower (before the switch if you install one, lastly DO NOT forget to connect the ground lead from the cord to the blower housing AND the motor casing, there are rubber grommets between the motor brackets and the blower housing, and sometimes rubber between the band clamp and the motor casing. The last thing you want is for the motor casing to become enerigized if an aging armature breaks down and shorts to the casing. www.amazon.com/dp/B09P9T86TT?psc=1&ref=ppx_yo2ov_dt_b_product_details www.amazon.com/dp/B08QVCYLMD?psc=1&ref=ppx_yo2ov_dt_b_product_details

Great job!

Just so everybody knows you can take an amp meter and check the amps its pulling and then tell how much you need to restrict it. The running amps are listed on the tag on the motor. If you don't have a meter feel the motor. If your pulling too many amps it will be hot.

Great video! Very nice work. I've heard the same thing about restricting the air flow. I must admit that I don't understand it. But apparently it is right so I'll do what you did. That said, I would've thought that the filter was enough of a restriction??? Love your attitude about "throwing things away". Thanks for sharing.

Hi George! Nice project! Phoenix AZ for your pin collection. :)

George very well done. But would like to know more about the motor side filter and detail of the keeping the filter away from the motor.

I'm in the process, good tips, the amp issue on the intake, I not being an electrician or HVAC guy gonna have to hit the textbooks, but the cover on the intake should reduce amps

Nice project George. On my fan I made a way to mount an air filter on the outlet so I could use it to filter the shop during dusty jobs. Also, I use it on the patio to keep cool (filter not needed here :>). Did the inlet restrictor quiet it down much (if at all)?

i made same thing from my heating unit fan.it works the best..three speed.

I plan to build a dust filter with a similar fan. It will be pulling through two filters and pushing through another Is that enough resistance to protect the motor? How did you determine the amount of restriction required?

I've recently been trying to complete the same type of project but thing is I'm not sure if it worked to start with and on top my Q. is simply does all motors have to have the compassitor or are there types of blower that don't need them cause I'm not finding two brown wires although I've got more then I've seen in videos mine has three and then another seven where the speeds are normal located I wired up to best of my ability but nothing but I didn't have a compassitor so tell me what you think is probably what going on with it?

How do you wire a squirrel Cage fan? It’s 115 walk or boat who I extension cord to work

What motor is it? 220v 110v???