On Oct 30, 8:24 am, Jules . Anything with a lot of inertia, like slab
heat, is best left alone
Does that necessarily follow? Anything with a lot of inertia will
cool off much more slowly too. So you don't have nearly as far to
recover when you raise the temp again.
Maybe that part of the question should be rephrased as a time
Drop the temperature by 10 degrees. There will be a transient period
while the temperature is falling. Then there will be a steady state
period while the lower temperature is maintained. And another
transient period while the upper temperature is reestablished.
Clearly energy use is lower during the first transient period, as in
Clearly energy use is lower during the steady state period due to the
lower temperature setting.
Not so clearly energy use is higher during the second transient
period, your heat will not cycle until the new steady state is
If lower steady state is never reached because the setback is for too
short a time, then it seems logical that energy use during transient
periods would average to 50% duty cycle. But this isn't necessarily
true, because the time periods may not be equal. Loss of heat to the
environment is not at the same rate as gain of heat from the furnace.
There's a factor you haven't considered.
If you have a programmable thermostat it doesn't apply.
But if you have a manual one, changing the setting frequently will
make it wear out faster.
Never having worn one out myself, I don't have a guess at how much
faster that would be.
TP must unroll from the topside of the roll (so loose end hangs away
from the wall). This way pulling the paper up lessens the friction
imposed between the roll core and the dispenser hub allowing less-
restrictive unrolling. Additionally having the paper hang away from
wall, lessens the occurence of fingerprints (and finger nail
scratches) on the wall itself caused by people scratching against said
wall to find the roll end. Additionally there is better visibility of
the roll top as opposed to the roll bottom in finding the paper end in
a visual manner (as opposed to a "by feel" manner).
This is a well-known fact, TP must unroll from the top of the roll,
not the underside.
Yea but if the ground is on top and orange juice spills in it, the ground
will divide the water left and right just beyond the prongs (regardless of
liquid volume, velocity, viscosity, wind, gravity, sunspots, etc) and
effectively nothing happens. Ask MacGruber.
Six of one, half dozen of the other. Depends on how long you are gone.
Leaving the thermostat at a steady temperature saves energy. On the
other hand, a lower difference between the inside wall and the outside
wall means lower heat loss. So lowering the thermostat does save energy
in the long run. Now, constantly raising and lowering the temperature
for short periods wastes energy. When you raise it you have to reheat
not only the heating system but the entire inside wall, floor and
ceiling not to mention all the furniture and appliances. When you lower
the thermostat, all those items lose all their heat again the heat is
drawn out into the room and the room loses it through the walls to the
outside. So....use your little noggin.
Nope. If you lower the thermostat, gone for an hour, takes an hour to
cool off the house, then come home and turn it back up it takes twice as
much energy to heat up the house and all the contents than if you had
left it alone. Put that in your pipe and smoke it.
Now if you go to Florida for 3 months and turn it down to 50 degrees,
yes you save a bunch.
What kinda dummy is set the 'stat back when going for an hour.
We're talking about typical situation, all day or all night set back.
Be reasonable. Dig out a research test result done by such as Honeywell
and utility outfits. Saving energy is proven thing no matter what.
Also no matter what, insulating house well is pre-requisite for things
like programmable 'stat. Your argument does not have legs to stand on.
Whether it's an hour or a month will determine how much money you save
when you turn the furnace down. If it is only an hour you might save
only a penny for all I know, but you won't use as much energy.
No. You just made that up and it's nonsense. It takes less, not
twice as much.
Where are you coming from? The lower the setting the longer the
setting. You save energy. I am talking about how much saving. Just
it saves. Our 'stat is set to 17C from midnight. Back up to 20C at 7 in
the morning. It does make a difference. Now our NG price is 3.80 per
GigaJoule. Electricity is 7 cents/KWh
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