Speed controling a 120VAC small household fan?

So, recently was in the hospital for a month. I had acute pnomonia, and it was so bad that they had to put me into a drug induced coma for a month and I was on a ventilator. I've recovered nicely, but for me anyways - I kinda need to take care of my lungs the best I can. Enough about that.

So the commercially available fume extractors don't really appeal to me. They just move the air around. I know that industral units are out there, but that is way outside my budget, requirements, and space.

I wanted to make my own fume extractor that vents to the outside. I think that I'm going to use some dryer duct, make a arm to support it, and build a fan into a box that sucks the air in, and then pushes it out the window.

For different work, I would like to control the fan speed. Higher for soldering, and maybe lower for say, fumes from glue drying. So my question is:

How can I speed control a 100-200 watt AC fan motor?

Thanks!

George

Take a look at http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1253815823/7

or

http://www.flickr.com/photos/unavoidablegrain/331512093/

He may or may not have details about speed control for an AC motor but Grumpy Mike probably has some information that will help...

http://www.thebox.myzen.co.uk/Tutorial/Introduction.html

http://www.thebox.myzen.co.uk/Workshop/Introduction.html

Well I looked at the links - Thanks you - but neither answered my question.

I've seen triac for dimming light bulbs, but wans't sure if you can use it for speed controlling a motor? Anyone?

I've seen triac for dimming light bulbs, but wans't sure if you can use it for speed controlling a motor?

Yes you can control AC motors with a triac and phase angle modulation, just like you do with a light bulb.