Hi: Depending on how big your cottage is you could put in a gas fireplace. They are in around 93% efficient now I think. I did that at a house/cottage I owned and had no problems, crawl space was to low to run duct work. The house was 1100sq ft.
Mike
Hi: I have fished Orr lake, Like others have said the ramp is not good, no dock, sand launch, good parking, it is a shallow lake, tops out at about 10ft, has Lb, Sb, and crappie, not to many pike anymore.
Mike