We purchased this for use in our RTT and finally had the chance to use it (when needed) over Thanksgiving. Initially, it would run for about 10-15 minutes before shutting down due to overheating protection. Shortening the heater vent hose down to about 8 feet from 12 helped somewhat, but we continued having the same issue, just less frequently. Once I realized that any slight curvature of the vent hose within a few feet of heater would apparently limit the flow enough to allow the heat to build up, I was able to slightly angle the unit up (only an inch or so) and it ran all night without any further issues. I will point out I have no idea what the temperature setting on the display is meant to indicate, because even leaving it at the default 8 degrees Celsius provides plenty of heat. Also, the app is not the most intuitive, but once I figured it out, using it along with the remote served my needs perfectly. I would recommend this to anyone willing to put in a little effort to get it working for your needs.