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Old 11-20-2006, 01:04 PM   #1
Montana_5701
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Furnace / Propane

Assuming most have 2 - 7½ gal. propane tanks on the 3400 RL's. Again assuming 40 to 32 deg. temps.. How long is each bottle lasting?? I was out last weekend in these temps and it seems my furnace was on overtime. Thoughts ??
 
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Old 11-20-2006, 01:15 PM   #2
awaywego
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Michael & Isabel,
When we are in those temps a tank will last 3 to 4 days.
The furnace runs a lot but the burner is only on part of the time.
The blower comes on and blows a minute or so before the furnace lights and then if the temp gets to hot the burner will cut off until the temp drops then if the thermostat is still calling for heat it will relight.
Once the thermostat is satisfied the fan keeps running to get the heat out of the unit and ducts.
This way the fan may run for five minutes but the burner is only running maybe two.
We get two to three days when the temp is in the low twentys.
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Old 11-20-2006, 02:19 PM   #3
Native Tex
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Michael is about right on the mark regarding the life of the two tanks. We do augment our with a portable propane heater that we use in the bed room to help cut down on the usage. If you are out during the day for extended periods, but sure to reset the thermostat to help reduce usage. We also were warmer clothing in the Monty to support all our cuts. If you do this, you may get an extra fully day and part of another. It all depends upon your usage temp.
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Old 11-20-2006, 02:34 PM   #4
bob n pam
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So many variables, but when we "wintered in Chicago" in our 2955RL used a tank about every 4 days and this was with film on the windows and 2" stryrofoam on top of the slides.
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Old 11-20-2006, 02:37 PM   #5
The_McCullochs
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Another good reason for our gasoline-fuelled onboard Onan: when dry camping, we can use ours to provide power for not only the heating unit in the fireplace but a couple of electric heaters as well.

This helps cut down on propane usage in non-freezing temperatures.

FWIW, we've averaged 2.5 - 3 days/30# tank in those temps.
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Old 11-20-2006, 02:58 PM   #6
Montana Sky
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I ran through 2 bottles in 4 days in April. Now use space heaters to help cut down on propane usage.
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Old 11-20-2006, 03:03 PM   #7
Cat320
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This is from an owner's manual of a TT we owned:

Each gallon of LP gas produces about 91,500 BTUs of heat energy. A typical seven gallon container will provide about 640,500 BTUs of heat energy. Here is a list of typical appliance consumption when turned on full for one hour of operation:

Water heater: 12,000.
Refrigerator: 1,500.
Furnace: 20,000.
Oven: 14,100.
Each burner: 5,600.
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Old 11-21-2006, 04:25 AM   #8
sreigle
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At 32 to 40 degrees if the only gas appliance running is the furnace, then one tank should last a week or better, depending on thermostat setting. Also, try electric heaters to keep the furnace from running any more than necessary.

With temperatures in single digits (F) and water heater running only on propane, we used to get three days on one 30lb (7+ gallon) bottle.

A lot depends on the thermostat setting and whether the water heater is on propane.
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Old 11-25-2006, 05:38 PM   #9
Bluegill
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One tank lasted 3.5 days with both me and the bride. When I'm alone it will last 6-7 days. I turn off the heater when I leave for work in the morning. Less cooking too. Thats when the temps were in the mid to upper 40's at night. Tonight its brrrrrr 36 degrees with a wind chill of 26.
I had my 120 gal tank delivered Friday. No more worries.
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Old 11-25-2006, 10:58 PM   #10
cmp-shooter
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1 tank =2 days$$$$$$$$$$$$$$$$$$$$$$
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Old 11-30-2006, 03:24 AM   #11
dmr1021
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We've been running on 30-40 degrees for a couple of weeks. Thermostat set to 65, hot water on electric, cooking for 2. we get 4-5 days on a bottle.

We have the artic package and dual pane windows.
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Old 11-30-2006, 03:50 PM   #12
sreigle
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I should add that at those temperatures we also are running electric heaters. That's probably why we get a bit more time out of our propane bottles. But at those temperatures there's no danger of a hard freeze freezing up our water lines.
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