I have been busy at work this week and so have the girls. Jon has been even busier. But, between furnace building, manual writing and picture taking, I spotted something really interesting... Take a look at the size wrenches they used to build a few furnaces!
The wrench on the bottom is 5/8" - standard size that almost everyone has in their home... But take a look at ALL of the others!
And here is the giant wrench in action on a furnace!