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Old 01-12-2018, 08:11 AM   #1
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Exclamation Cold Weather Question

The wife & I will be moving into our 2016 Eagle 321RSTS next week while we're doing some much needed repairs to our home. Temperatures are expected to be as low as 17 degrees at night, with daytime highs in the mid-40s.

My dealer says that I must utilize the furnace (propane) in order to prevent the holding tanks and under-floor plumbing from freezing.

My thought is that if I use the electric fireplace, an additional small electric space heater and keep the furnace fan "ON", this would suffice. Electricity is less expensive than propane and less of a hassle.

Heat is heat, unless I'm missing something.

Who's right: The dealer or me?
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Old 01-12-2018, 08:16 AM   #2
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Your furnace has ducts into the underbelly which is why it will help keep things from freezing down there.


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Old 01-12-2018, 08:25 AM   #3
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So are you saying that recirculating warm air from inside the RV (electric space heater and having the fan set to ON) won't provide warm air through the ducts to the underbelly?
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Old 01-12-2018, 08:35 AM   #4
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WestTex, you make a good point. We’ve not camped in temps that cold but into the upper 20’s we have done what you’re talking about but into the ‘teens may be another story. You could probably get by with what you’re talking about but if it doesn’t work the results could be costly.
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Old 01-12-2018, 08:44 AM   #5
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You have to use the units furnace to heat the underbelly. Not sure it will work when it's THAT cold out. There's not enough heat being generated by that small furnace that'll keep your pipes from freezing up at those temps. I would say temps no lower than 25. Anything under that, you're playing roulette.
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Old 01-12-2018, 08:56 AM   #6
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The problem you will have is the propane furnace output temp is 140-170 degrees and cools as it passes through the system. If you use the furnace fan to move the air its starting at 70 degrees and will cool very fast once it hits the underbelly ducts, that won't help with freezing.
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Old 01-12-2018, 08:58 AM   #7
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I have heard of some putting a small electric heater in the storage area to assure it's warm enough not to freeze the tanks and pump but I would not even do that at 17 degrees.
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Old 01-12-2018, 09:34 AM   #8
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Quote:
Originally Posted by WestTexasRanger View Post
So are you saying that recirculating warm air from inside the RV (electric space heater and having the fan set to ON) won't provide warm air through the ducts to the underbelly?


Put a couple wireless temp sensors in appropriate places in the belly and track the temp. If itís too cold, turn the furnace on.


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Old 01-12-2018, 09:44 AM   #9
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Originally Posted by TWP723 View Post
You have to use the units furnace to heat the underbelly. Not sure it will work when it's THAT cold out. There's not enough heat being generated by that small furnace that'll keep your pipes from freezing up at those temps. I would say temps no lower than 25. Anything under that, you're playing roulette.
I appears from this video that the furnace should keep things from freezing:

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Old 01-12-2018, 09:47 AM   #10
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The problem you will have is the propane furnace output temp is 140-170 degrees and cools as it passes through the system. If you use the furnace fan to move the air its starting at 70 degrees and will cool very fast once it hits the underbelly ducts, that won't help with freezing.
What about RVs that use a heat-pump instead of a furnace? The output air of a heat-pump is going to be 85-90 degrees.
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