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« on: January 11, 2022, 12:20:14 pm »
There was a recent thread about a melted plastic cover in close proximity to the furnace hose. Today, while doing my monthly run time, I brought my infrared thermal gun. The wall temps were steady at 21*. With engine and generator running, cranked on the furnace. This is for a 2552 so others might be different. After about 2 minutes of running, and the thermostat set at 74*….the outlet duct under the bed(closest to the furnace) the temp went up to 158-160*! The flex duct was in the upper 90s*. The outlet under the sink was in the low120*. The metal box around the furnace stayed in the low 90s. After about 15 minutes, the outlet under the bed stayed in the low 120s and the flex hose stayed the same through out. Wall temps got to the low 50s.
So, because the outlet vents are plastic, it would take a lot of temp to get them to melt.