Not as hot as we think it seems. I've just taken some measurements with a laser thermometer along the length of the flue pipe, after the fire had been on at maximum for 15 minutes. At the exhaust flange the temperature was 154C. Three inches along the flue the temperature dropped to 104C. By the time it was level with the fan motor at the back of the fire temperature was down to 70C. Just below the worktop it was 62C. Below the overhead lockers it was 55C and at ceiling height was 31C. But how many of us leave the gas fire full on after an initial ten minutes, so at that point I turned the fire down to position 5. After time to stabilize, temperatures were 112C; 90C; 56C; 46C; 40C and 28C. Fortunately my panneling is removable so it's easy to check the temperatures. And yes - I also have wiring running alongside the flue.johnandrew70 said:Can any tell me how hot the flu pipe gets on the space heater in the van,