Actually 1 Watt = 3.414 BTU ___per Hour___
So if you run a 1 Watt heater for one hour it will consume 1 Watt
hour of energy and deliver 3.414 BTU of heat.
Or in more useful number
if you run a 1 kW heater for 1 hour it will consume 1 kW Hour of
energy and cost about $0.15 and deliver 3414 BTU of heat.
Yes, good point. Since Energy= Power x Time and the BTU is an energy
unit, time has to be included someplace.
It could also be written as 1 watt of power used for 1 hour or 1 watt-hour 3.414 BTU
10 x 15 shop which serves as the basement for a family room extension
off the rear of the house. The shop has 3 exterior concrete block
walls (all above ground due to the slope of the lot) which are 2 x 4
studded, insulated, and drywalled. The ceiling (2 x 8 joists) is also
insulated to dampen the sound and to try to keep the family room floor
a little warmer.
The room never gets all that cold since it is part of the basement and
there is some air circulation from the main part of the basement,
especially if I leave the door open.
The small fan based electric heater that I've been using for years
does a more than adequate job of heating the space. Depending on how
long I'm in the shop and how active I am, I am often able to lower or
even turn off the heater after a while.
I was thinking that if I ran the oil filled heater on low it would not
only keep the room warm all of the time but might also help with the
floor in the family room. Even if there is no operating cost
difference between the fan based heater and oiled filled heater, I'd
prefer the silence and no moving parts of the oil over the fan.
On Tue, 29 Nov 2011 07:20:01 -0800 (PST), DerbyDad03
Oil filled is radiant/convection,conduction. Fan type is forced air,
so different heating patterns - but the same amount of heat. The fan
forced heats more air - the oil filled heats air more (warmer close to
the heater - but does not distribute the heat as well/far)
Heat output is the same. If you open a door and let some heat out, the
oil filled MAY recover heat in the room faster than an "open coil"
type heater, and the temperature will be more even - less "on-off"
IIn a closed room there is NO DIFFERENCE in actual operating cost .
On 11/29/2011 1:22 PM, firstname.lastname@example.org wrote:
The oil filled heater may also take longer to recover heat loss if it
had been cycled off for a little while. They can be good if you set
them properly, most are adjustable 500/1000/1500 watts in addition to
the thermostat. So depending on the outside temps, you want to adjust
the wattage so the unit cycles less often. If done right it's hard to
tell by feeling it if it is on or off and it gives a nice steady heat.
Put it on 1500 watts when it's not very cold and it will cycle from very
hot to lukewarm and not be a "comfortable" heater.
On Mon, 28 Nov 2011 09:29:20 -0800 (PST), DerbyDad03
When electric energy is converted to to heat it goes thru a resistive
type of wire. While the electricity is being converted to heat, much
of the energy is lost as heat, thus you're wasting much of the
electricity in the form of heat.
There's a third type of heater that would end up using the least
electricity, but it would require an initial investment.
Since the 1950s, there have been tubular "lamps" available called quartz
infrared heaters. They emit both heat and a substantial amount of light.
Compared to other types of electric heaters, they emit shorter wavelengths
of infrared. Those shorter wavelengths heats things (people and objects),
not air. In your workshop you would need to have them on only when you are
there and want heat. The heat is instantaneous. It feels like sunshine.
I have two quartz infrared heaters in my garage - each 1500 watts. When
it's cold and I'm there working on the car or bagging trash, it's warm. I
just switch them on and off as needed. The light is a bonus.
Such heaters are widely used for snow melting, paint drying and cooking.
Typical marketing department nonsense.
This line "During the process of converting electrical energy into heat
energy a great deal of it is lost. " is total nonsense.
Where exactly is the energy lost except maybe a very, very tiny fraction
as heat in the wiring and connections? (and in this case not a factor
since the objective is to heat the room)
I've heard, that if you look closely, you'll find some very fine powder or
dust in the vicinity of some electric heaters. This is the loss in energy
inasmuch as the energy has been converted to matter. Of course it takes an
enormous amount of energy to create even the smallest amount of matter (and
vice-versa), so don't expect to see piles of the pills. But every electric
heater I've ever had will show dust around it after sitting in one place for
the winter season.
Perhaps that's what the "loss of energy" people are talking about.
My apologies. I try to be ambiguous on almost every post - it gets people
either thinking or outraged. Even in the latter case, my view is that
adrenaline is good for you. I should have said that up front.
No, it's not for my personal pleasure. Read the post again (above). It's for
purely altruistic motives.
I just want to leave the world a better place.
In that regard, I'm designing a line of hand painted, ceramic nose puppets:
George Washington, Bucky the Beaver, Eiffel Tower, and so on. You push one
up a nostril and go about in style.
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