After one winter with temps dropping as low as -40, i LOVE this! I have had no issues. I use it in a poorly insulated shorty school bus. At -30, it will heat up to about 12c. If i insulated properly, it would be fine.The clamps and fuel line were the higher quality type, not the green crappy hose. I am very impressed.Frankly, if a heater lasts a year, it owes you nothing. I am starting year two. This could be the start of a beautiful relationship!