Lutz

If interested, please let me know by November 30, 2017. You may still be able to join us beyond that date, but we'd like to have a reasonable head count by then to ensure we have enough people to move forward with the planning.

I've been working with the great folks at SOFA to try and coordinate a tire-hammer workshop, led by Clay Spencer. It is tenatively planned to occur mid-April of next year. The cost would be approx. $1500 and several days of work to leave with a finished tire hammer/power hammer. A 50% deposit would be due in advance. This would be held at the SOFA facility in Troy, OH (where Quadstate is held). Details are still being worked out and are thus subject to change, but we are trying to gauge interest. If you would be interested in attending, and would have the financial means to do so, send me a PM with your name and email address and we will keep you in the loop. Details will be available soon on the SOFA website (www.sofablacksmiths.org). Please note that some sessions of prep work are required prior to the workshop itself, so if you live too far away to attend those sessions, please let me know so we can discuss alternative arrangements.

I believe I found your anvil's sibling. I just picked it up a few days ago and I have not yet had a chance to clean off the paint and uncover the serial number.

Thank you to everyone for the input. You've helped me to conceptualize ventilation needs and considerations much better. At this point I'm planning on going with a powered exhaust fan at the roof peak. I'll monitor CO levels closely with the idea that I can add additional ventilation (beyond open windows/doors) at a lower level if needed in the future.

Thank you all for the greetings and the input! Alan, My limited understanding on positive pressure systems is that you are creating an area of increased pressure in the shop by forcing air in via fan, and it then naturally evacuates to outside the shop which is of a lower pressure. I would imagine you facilitate this exit of air at the roof level with something like a turbine vent illustrated by Latticino above. Am I thinking in the same terms as you are? If that's the case, the question I have is, how do you calculate your CFM needs? If you have a large diameter turbine for exhaust, can you base it on the CFM of your fan inputting air in the shop and be confident in the ACH being provided? As I'm talking it through, it also seems like it may make good sense to simply have a mixed system, with both powered intake and output that could be used as needed, though I'd still be interested in thoughts on the above questions. I plan to run a CO detector regardless of my configurations.

Thank you everyone for the helpful information. I've been reviewing this thread in anticipation of constructing my shop at home. I anticipate setting up for a coal forge with hood, propane forge (blown burner, approx. forging area 17" x 6"), and a small woodburning stove inside a shop that is 10ft x 20ft with 10ft peaked ceilings. The building size may be modified, but that is my current plan. I don't anticipate insulating the building, which will be wood frame on a concrete pad. If I'm following the discussion correctly, Latticino's comments in particular, I'm coming up with the following calculations: I would have a room volume of approximately 2000 cubic feet (though I appreciate I'm not yet allowing for the peak space). To allow for 10 ACH I would need a fan of at least 333 CFM (2000 cubic feet/ 6 = 333.33). This coupled with adequate lower ventilation (i.e., open doors/windows) should allow for appropriate ventilation. Does it appear that I am tracking/calculating that correctly? If so, it appears to me that a fan such a this Master Flow 1500 CFM would be more than adequate. Does that seem like a reasonable choice? Thank you in advance for any input.