[kelvancra]

Do some searches and you'll find references to this over and over again. These things are engineered to run with so much restriction. Without it, the motor can run much faster, for example.

That said, there is no reason you couldn't get the same effect by restricting the pipe. Of course, dropping the thing down from, say, a twenty inch output to a six inch or four inch sounds like "no much fun." Then there is the heat or cooling loss, at a rate of, say, five hundred CFM.

Fred,

I have vented my blower outside (cyclone) and it works great. I don t understand how reducing the back pressure could overload the motor. I would think it would actually reduce the load. Please educate me! I talked to Jet before doing it and they said there would not be a problem.

Mark,

The only realisitic way I know of is to remove the motor/blower from the bag assembly, turn the unit on its side and add either a cyclone or some other separator. Then just attach a duct through to the outside.

But I totally agree with Fred, on a unit this small I think you re wasting your time.

What are you using it for?

Keep in mind with venting outside you need replacement air which in Montreal is a critical consideration, depending on the size/cost of heating your shop.

My advice is to simply upgrade the filter to a canister, attach a small cyclone and use it as a mobile machine-to-machine collector.

- rwe2156

 

[kelvancra]

Good point (inflow vs outflow). My three horse cyclone talks about not running it without load on the front end, but says nothing about the outfeed. However, could it be it's a calculated balance? After all, restriction, whether at the front or back is going to affect performance.

Of course, switching to finer bags on my three horse, four bagger should be considered an issue to then.

What I can tell you 100% from experience is that if you allow a fan designed to work with restriction, to pull more air than it should, the motor will overheat. The restriction on a DC should be on the inflow, not the outflow, so venting outdoors shouldn t hurt the motor.

Back on topic, I know 2 guys who vent outdoors. I ve been in both their shops during the winter and couldn t feel a temperature change while the DC was running. The reason is that once everything (machines, floors, walls, etc.) in your shop is up to temperature, it will hold temperature even when some air is evacuated. It will be less energy efficient but not as bad as people theorize.

- Rick M.