For the last number of years I have been using a Triton air helmet in my shop while turning. I had to replace the batteries a number of years ago and the fan motor last year. Now it is acting up again and I guess it is time to retire it. I am considering the Trend Airshield Pro ($500 Cdn) or the 3M Versaflo system ($2000 Cdn). My concern with the Trend is the weight on my head with the batteries and fan being located in the helmet. I think it would be top heavy and possibly noisy. Also, there is no hearing protection. I know some of you use the 3M system or its older Racal unit. I have read of problems with the battery connection on it. I can purchase the hearing protectors to use with it. My concern here is the price. I do realize it is cheaper than lung disease. I do have and use a regular face protector while turning in place of the Triton, but it does not provide dust protection. I also have a 3M dust mask with filters which is good for the dust but uncomfortable for long periods of time. It will fit under the face shield. As well, I have and use ear muff hearing protectors (which I require when using my dust extractor) but they don't work with the face shield. I have heard of people hooking up helmets to a hose system of some kind but I don't like the idea of being tethered. So, what do you use and what are your feelings on what you have? Thanks for sharing.