Do you have a stand fan that you can put it in front of your bike? I have one in front of my treadmill, and I can walk two or three times as long as when I'm exercising in still air. I don't like the idea of building one into the exercise equipment. For one thing, that's just something that may break later. Plus, I don't think the ones they build in are very powerful, at least not for my tastes, lol.
Good luck with the bike, please let us know how it helps in your weight loss goals