So I have had a bk PI1010a for 10 years now and love it. 6 out right now house is in the 70s. My dad just bought a Princess 29. The CFM on the fan is horrible next to my old princess. I see he has what looks like a single prop oversized computer fan vs my dual squirrel cage fan. My question. Can we retro fit an old style fan on there with out too much complication? Merry Christmas everyone. Thanks in advance.