We were looking for a solution for a bedroom that is less than 150 sq. feet, on the lower floor and above a crawl space in a coastal flood zone. Most added insulation options were ruled out because of past flooding. The room was always an issue in the winter, being colder, than the rooms above, but most visitors came during warmer months. Recently family wanted to visit during holidays in December and January, so we needed a solution. Our research led us to eheat smart envi heater. We were able to compare the features of eheat heaters, with other options, and chose the envi smart heater. Easy to purchase, delivery was 3-4 days (Texas to New Jersey), and the info to install was simple and less than 30 minutes.