she works real goooood! I built this one out of PVC pipe. It's seventeen feet wide, twenty seven feet long, and nine feet at the highest point. Heat and vents are fully automated. Had to build it on the cheap so I could afford he 100,000 BTU Modine heater, vent fan, and thermostats. We have a few nights between 0 and 10 degrees F and several days a year, sometimes a couple of weeks without making it above 20 degrees F. The winds here are an outrage, but then it is tornado alley. It took a bit of time and effort to build it, but we are about to embark on our fourth winter voyage in it.