The fan thing may hold some merit, but the other things not so much. I concur with Marty- there is no reason to cycle the pump. Turning them off and on all the time will kill a pump much faster than running it constantly, not to mention the volume of nearly frozen water in your lines that would need to cycle through your heat exchanger, blowing ice cold air, before you get any heat. Counter-intuitive the way I look at it. 100 ft of 1" PEX underground holds about 3 gallons of water, so at the standard 7GPM you're blowing ice cold air for 25 seconds before gaining any heat- while also pouring 6 gallons of ice cold water into your 180 degree boiler; we know how good that is for your boiler. The water flushing thing makes no sense either. As Marty said, fresh water will introduce fresh oxygen thus fresh oxidation. Not a good plan. This goes to show that ya can't believe everything you hear. That guy is ill-informed or perhaps just goofy. If you're only going through 12 cord for 5200 sq ft, I probably wouldn't screw with the fan either. Seems to be working well for you. Might be worth picking up a $12 BBQ thermometer from Mills Fleet and putting it in your stack to monitor temps, then unplug the fan and watch it again for a few days. That'll tell you what you're losing up the stack by using the blower or not