... same with or without the device but that doesn't mean it won't work (as someone stated here). The only thing this device does is transfer the radiation energy to warm the air instead of all the other objects in the room that have a much lower conductivity and therefore are much less effective warming the air in it.
The principle of conservation of energy applies here and still this device will probably work wonders!!! There’s a catch though; when the sun is gone the room will probably be a little colder because all the objects in the room now have less heat to transfer slowly over the periods when there’s no sun anymore.

that will only give you hot air in the summer and cold air in the winter

Don't use directly below vinyl blinds. For obvious reasons to some.... for other "because it melts them and causes them to slowly warp".

Not that I learned this from experience or anything... heh heh

much do the coins cost?

pause the video and count them, duh.

Radiation that passed glass of window already is in your room. It doesnt matter if it meet on its way black painted coins, carpet or sleeping cat. There are only two ways of increasing temperature inside the room and both are "outside": insulation and pumping-in energy.That video is obviously "joke", but dont worry if you was tricked- you will lern phisic. Some day...
PS Naturaly you can burn furniture too.

Infrared light from the Sun only accounts for 49% of the heating of the Earth, the rest being caused by visible light that is absorbed then re-radiated at longer wavelengths. Radiation can propagate through a vacuum. But if visible light is reflected (not absorbed) then it can not re-radiated the additional light. His mechanism allows the visible light to be absorbed and re-radiated to the room rapidly. = free heat

I just love people who don't try something first before commenting on why it doesn't work. Is an outside passive system better? Yes, but they cost about a thousand to build and install. This uses the exact same principles and heats the exact same air in the exact same way. Here's a simple experiment for you to try. Color a penny or other coin black, place it next to an identical coin that isn't colored in the same sunlight in the same room and tell me which one get's hotter. By your reasoning this will not work!!! OMG!

Will this also work using aluminum sanded and sprayed black. Aluminum is also very heat conductive and responsive to temperature...

some day you will learn how to spell.
Show some respect.

Hello, mister scientist. Do you know that different surfaces absorb electromagnetic radiation differently?

Yeah, but maybe some day you'll learn grammar and spelling. And your credibility will rise, just like the temperature in that little box he created. :-p

you are the one that is so simple (minded) and stupid.Have you seen this guy's ratings?He is not hardley gonna put something on here that does not work.I think you may just be mad cause you couldn't think of something like that

Streniksen is 100% correct... this device is precluded from working by very fundamental thermodynamics principles...

VENTILATION

Curtains block the sun, and reflect the heat back outside. Use brighter colors, get a cooler outcome. That or use your blinds. Quite powerful.

Another thing people could do is replace your single pane windows with two and I'd actually recommend three pane windows. Three paned windows give you two pockets of air between you and the environment, it's far more efficient for heating and cooling purposes.

Something my father always does is to rotate your air. For example, if you have a two bedroom house, have the vents leading your heat/cooling to the first floor during the day, and the second floor during the night. Believe it or not, this actually saved quite a bit.

a room at night. Just point it to an empty space in the sky and it will radiate heat towards it. Deep space is very cold (it doesn't emit thermic radiation, it absorbs it).

Other option is to rebuild your room and/or house with an structure similar to termites colonies. Their high structures and multiple air flows promote quicker hot air dissipation. Maybe a similar effect can be used using pipes to direct warm air?

Not yet...lol

and I need that in Canada, where is freakin' cold all the time..

The law of conservation of energy will prevent this from working efficiently. See my detailed post somewhere below.

The law of conservation of energy will make this device very inefficient or pretty much prevent this from working.
If the energy in the form of light (including infrared) has entered the room and if it is absorbed by the window sill, carpet, etc, it is in the room already and it will heat these objects.
Some of the light may be reflected outside if the surfaces the sunlight hits do not absorb light very well. To prevent this you can take a black cloth, paper anything black and place it where it will absorb the direct sunlight. You can also try painting your window sill black.

do these only work when the sun is out? can you make them more efficient by making multiple stacked rows of pennies?

The greater the thermal mass, the better the radiation of heat. Theoretically, with a large enough mass, you can collect enough heat to continue warming the air after the sun is no longer shining. This will work on light overcast days, but not nearly as efficiently.

James Dulley is a mechanical engineer with a syndicated column in over 400 newspapers. You can read all about his window solar room heater, which my design incorporates many of the same concepts, albeit in a simpler manner, at his website. In my design, I use the non-glazed glass of my window for the extra insulation rather than the double plexiglass design he uses.

powder coat the glass with TiO2. the heat will become purify before entering the room.

ahh what the heck..

I appreciate it very much!

But a sheet of plastic, even like the drop cloth I used, is recommended as an insulating layer. Glass conducts heat (and cold) so most of your generated heat will be used to warm the window glass instead of going into the air. That's why many Window Insulating kits contain thin plastic and double sided tape, yet work very well.

With aluminum foil, it just won't radiate quite as much heat.

That is not a silly question at all. The ideal would be a sheet of copper as the backing, which would not only heat the air, but give you radiant heat as well, just like a cast iron stove. More pennies will definitely work, but I would suggest a wood back for them. They get REALLY hot. I just put a thermometer on one and it read 130 degrees F!

stick all your gold on the window and paint it black.. u can see none of em on d next day.la la la la....

I even made on with a cookie sheet paintedflat black and a large plastic bin that was about 12 inches deep, cut slits in the top and bottom, then put Saran Wrap over the front. Worked just fine, although not as efficiently.

I don't try to present myself as a scientist, or that I know everything. All I can say is that I research what I do as thoroughly as I can, and give it a shot. There's a great quote from Arthur C. Clarke that goes like this: When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.

You will want the larger vent at the top. I actually increased the smaller vent at the bottom by about twice the original as that performed better. Then side panels are set at a 65 degree angle, which makes the front width about 24 inches. As a side note, I even found an old solar-powered fan that was originally intended to ventilate your car in the summer and placed that at the top vent to make it a forced air heater =)

The solar heater was so simple to make. The pennies get hot quickly, exactly as advertised. Thanks for the free heat.

I actually used a fan that was scavenged from a junk air hockey table for a day or two, then I tossed it out. Doesn't make sense to use electricity when the point is free heat. I need a solar fan.
Babblin is right though, this will collect a lot of heat. Enough so that the pennies get HOT. I used plexiglas for the whole thing. A word to the wise, if you use plexiglas, use a circle cutter bit or doorknob hole cutter for the vents. Jigsaw splinters.