-CSA safety standard approved tankless propane water heater,flame failure device, anti-freezing protection, over heating protection to ensure the family safety. Automatically decrease water pressure between 3.6-110 PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. The propane hot water heater will shut off automatically when high water temperature protection over 176 F. -Compact size and weights 23 lbs for easily carry. Hang it using the mounting bracket on the top/back of the gas water heater.