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Way off O/T.

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old

01-19-2008 21:20:41




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Ok so why is it that when its say 10 degrees out and you set up house thermostat at 74 that it still seem to be cold in doors but if its 32 out it seem to feel ok. Is it just all in my head or is it that the walls etc just get colder and hold that cold?? Hish today was in the teens and for some reason I have felt cold all day and can't seem to get warm

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Randy-IA

01-21-2008 17:51:08




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
Hi Old , I agree with the couple of posts that mention humidity . Check that in the trailer , if it's not up between 38% to maybe 50% relative humidity you will feel colder since your skin is always giving off sweat no matter what you do . It's called wind chill or evaporative cooling . When I lived in a mobile home out in Colorado it always felt cold in there and it was built for those weather conditions , I doubt yours is . We didn't have a humidifier plus thinner walls mean less insulation and colder walls . Plus you have cold air under your feet too . Now here in Iowa when I heated this old house I live in with wood only it was comfortable at a colder temp . I like being cold so I kept it at around 55-58* back then . I'm getting older or something because now I keep it up at 63* with the new heat pump . It's still a little to warm sometimes . One of the reasons I left MO , it to hot down there ! ...Randy

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KEB1

01-20-2008 12:41:47




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
Agree w2ith t-bone. The way humans perceive temperature is a function of both the actual temperature and the relative humidity. When its colder out, the furnace runs more and the relative humidity drops. Same reason that 100 degrees in Arizona is more comfortable than 90 degrees on the east coast - less humidity makes it feel cooler.

The less tight or less well insulate a house the more pronounced this effect becomes, because the furnace is running longer. A tight, well insulated house will stay at a reasonable level of humidity just from normal activities such as cooking. One that's not quite so tight or well insulated will be a lot dryer, relatively speaking...

Bring the humidity up, it'll feel warmer. Don't overdo it though, or you'll have water dripping off of everything.

Keith

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T_Bone

01-20-2008 07:53:42




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
Hi old,

Put a pan of water on the stove and raise the humidity in the house a you'll gain 5ºf in the warmth of feel to a human without having to raise the temperature.

As the temperature drops so does the humidity therfor we humans feel colder.

Standard air for HVAC design is based on 70º@50%rh as 90% of humans feel comfortable at those numbers.

Controlling humidity is much more important than controlling room temperature.

T_Bone

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Budn

01-20-2008 07:33:42




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
Had -35F actual temp not wind chill this morning in west central MN.



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Wayne in MN

01-20-2008 06:11:44




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
It's now -24 here in Western MN. We keep the thermostat at 70 & it is real comfy.
The key is insulation. I have 6" walls & close to 24" in the ceiling. My natural gas bill runs about $75 per month (average billing for 11 months) & that includes hot water heat. That is heating about 1800 sq.ft. Think warm thoughts!!



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Gun guru

01-20-2008 02:07:50




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
I think that it is because of the rate of heat loss of the house and cold drafts, cold floors. Do you have a wood stove or pellet burner? My pellet burner is running right now and it is a nice 70F in my house. (if I was running propane only it would be toooo expensive) 2F right now in Ortonville Mich. with -20f wind chill (its that global warming ya know)



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Ken Thies

01-20-2008 00:28:08




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 Warm? in reply to old, 01-19-2008 21:20:41  
Hey Old, When I lived in Mo. I could never keep warm in the winter. Up here at -10 it only takes a few sticks of wood to feel comfy. Now at -40 to -50 it gets a little chilly in here. but not that bad. I think it is mostly the insulation and the vapor barrier. Plus it is dry cold here and wet cold down your way. Throw another log on the fire. Ken



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James22

01-19-2008 22:07:54




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
Insulation in the wall/ceiling is a big factor. If not much insulation then the wall/ceiling gets colder, which generates the real cause; you don't get as much radiant heat from the wall/ceiling. All objects above absolute zero give off radiant heat, but the amount is dependant on the objects temperature. That is the reason infrared night vision lenses work. Essentially you are giving off a lot more radiant heat to the walls/ceiling then you are getting back at lower temperatures and therefore feel cold. Actually you could turn the heat up somewhat higher and still feel cold because of the issue of low radiant heat from the walls/ceiling. If you added more insulation to the walls/ceilings and/or added working heating elements to the wall/ceilings you could turn the thermostat down and still feel warm.

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RobMD

01-19-2008 21:32:23




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
Well it is all in that insulation. Insulation only insulates as good as the resistance to temperature change rating.

The cold feeling you have at a lower outside temperature means that the cold is slowly transferring in, or the warm is slowly transferring out.

The colder it gets, the more your heating system has to work to maintain temperature.

In an ideal, leak-proof, ultra-insulated home, it should take the same amount of energy to heat the home in any outside temperature range from an initial inside temperature.

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RobMD

01-19-2008 21:33:45




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 Re: Way off O/T. in reply to RobMD, 01-19-2008 21:32:23  
Dear Lord, i'm over-analytical!



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strawbale

01-19-2008 21:29:17




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
at my work they set the ac at 74 and the heat at 68



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dlplost

01-19-2008 21:27:02




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 Re: Way off O/T. in reply to old, 01-19-2008 21:20:41  
LOL, I know what you mean..
At work, all summer long they insist on the A/C set to 68 deg, then come winter they want the heat turned up to 76 deg.

I'm happy with 70 all the time.



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dave guest

01-20-2008 12:17:08




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 Re: Way off O/T. in reply to dlplost, 01-19-2008 21:27:02  
Accept the fact that everybody is different. As your wife if she's hot or cold. GM plant, poletown, had to have air conditioning for robots. Summertime mostly older people all wore sweaters and coats. Ro bots were happy, that's what matters. Humidity, airflow, lighting, number of people. Human is figured at 5000 btu per person. Worked during strike in 1990's with flashlight in mouth until boss was gone. Thats what they asked you to do.

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