having seen the aston martin owners at work removing it in the negative pressure sealed areas etc, some common sense has to apply here. If what you have is lovely blue asbestos thats collapsed into a dusty heap, dont even walk near the stuff. But for an old domestic boiler with seals in place and complete, loads of water, masked up in a paper suit and put it in a bag and seal it all up. Never use a henry on it as it will just blow it all over. I remember making a rabbit cage at school fm asbstos sheet, cut it all up and put it together over a few weeks, and it stayed in our garden with various critters for years. still here today, and more likely to drown in the sea than fmm my own lungs. Its not nice but the guys who cop it have normally been working in engine rooms or in the industry for years prior to getting this horrible disease