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Old 11-19-2012, 12:59 PM   #1
LEV ZEPPELIN
 
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Interesting idea...or suicide! Heating dump valve.

While trying to figure out ways to keep the waste valve assemblies above freezing, I had sort of a neat idea...or is it.

With the furnace running, the exhaust on the outside of the trailer throws out a lot of heat. Seems sort of wasteful. I had this idea that I could take a length of aluminum drier duct and without attaching that right on the trailer, which I know would be dangerous, position duct a few inches away from furnace exhaust and then have the opposite end pointing at the valve assembly.

Obviously by the time the heat makes it to the end of the aluminum duct, the temperature would be greatly diminished, but I figured it would just need to blow out air that is above 32 degrees.

Thought I see what you guys think.

JL
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Old 11-19-2012, 01:11 PM   #2
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Probably a light bulb or heat tape would be more efficient and less chance of not working.

Dave
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Old 11-19-2012, 01:33 PM   #3
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JL, there are some 12v electrical pads made for the purpose.

Furnace exhaust contains a good deal of water vapor, and contains combustion products that are corrosive. With what you describe you would have condensation in some areas which could cause damage.

But even a slight blockage of the furnace exhaust may cause erratic operation of the burner -- most likely increased CO emissions from an incomplete burn due to recirculation of exhaust gasses or reduced combustion airflow.
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Old 11-19-2012, 08:15 PM   #4
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What Jammer said...

I would think that even a slight restriction would effect the sail switch....I know a dauber nest did just that in ours.

Our winter trick to keep the critters out...


Bob
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Old 11-19-2012, 10:19 PM   #5
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Not a good idea that is dangerous CO exhaust gas.

Heat tape should work or use a flood light pointed at the valve so far I have never had a problem not heating the valve. Camped in 18 deg at night but it usually warmed up around 30+ in daytime.
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