Sometimes tinkering can make good things happen. The blower fan upgrade on my outdoor wood boiler is a case in point. The stock fan that came with my Portage & Main unit did a good job most of the time, but sometimes the boiler just seemed to need more air. Sometimes, but not always. That’s why I looked around for a variable speed fan that put out more air than the stock one, but could also be throttled back for those times when less air is more efficient. Click below to see the new fan and how I installed it.