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Lowest temp setting

rvr6000

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Joined
Oct 3, 2010
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1,072
Location
St. Paul, MN
What is the lowest temp setting for a run of the mill forced air gas furnace these days? 50-55 seems to ring a bell.
 
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rvr6000

Well-known member
Joined
Oct 3, 2010
Messages
1,072
Location
St. Paul, MN
Furnace.....I thought there was a minimum temp many of today's furnaces were supposed to be operated at. Debating whether to leave the heat on at the cabin my wife and I are buying or if we should just drain it down for the winter.
 

JimL

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Jul 12, 2005
Messages
271
Location
Indiana
90+% efficient furnace needs to stay above freezing. It will work as low as the thermostat will go.
 
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jimp

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Nov 20, 2010
Messages
561
Location
oo
I assume it's up north or in the mountains and it gets very cold.

Just because the furnace can be kept at 40-45 degrees does not mean your cabin can be, if you don't drain the pipes.

Are your wet walls exterior? Do you have a basement or a craw space (open or closed). We have a place at 9800' that we stay at a couple time in winter (snowmobile only way to get there). I would never leave the water on, even when we know we are going to be back in a couple weeks and leave the heat up. What are you going to do if you have a power failure?

If you don't drain the pipes, make every effort to keep the pumbing warm. Open cabinet doors under sinks, open bathroom doors etc.

Dont forget the waste lines/toilet and antifreeze (RV not the auto antifreeze).

If you can get to your cabin in the winter, I would. Our place is completely different in the winter and snowmobiling is fun.
 
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rvr6000

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Oct 3, 2010
Messages
1,072
Location
St. Paul, MN
No wet walls....water lines for the kitchen and bath run straight down into the basement. This winter is really gonna be more of a trial run for us to see how expensive it will be to just keep the heat on all winter at a low setting. I think if by New Years it's looking bad then we'll just drain everything and call it good til spring.
 

brewchief

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Joined
Sep 20, 2008
Messages
2,372
Location
Michigan
Most new furnaces I've seen say to go no lower then 55 degrees or you can get condensation in the heat exchanger.
 
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