I use this cheap mirror system for
- hot water supply to my summer cottage
- heating my greenhouse
- small heating of the house through its large window

My video will talk about this system of mirrors which helped this solar heater to give hot water to my summer cottage. We can notice that my mirrors are relatives of the mirror system of this solar heater, but my mirrors are cheaper and I placed them far away.

Now I will show you how my mirrors direct this solar radiation onto this solar heater. These are 3 spots of solar radiation from three mirrors of my system, and we see that those 3 spots combine on the surface of my heater. In addition, my solar heater receives solar radiation not only from the mirrors, but also directly from the sun.

Now we see the 2nd relative of my mirrors, and I described it in this old video. This system was also used for hot water supply of my summer cottage when solar radiation heats up 50 liters of water inside this tank, and for example, now we see that the solar heater increased the water temperature to 71 ºC.

Now I show the 3rd relative of my mirrors, and we see that it is very cheap. The cost of materials for these mirrors is less than 1 $ / sq.m, and this is a reflective mylar film on a thin sheet of expanded polystyrene with several wooden battens. Of course, the reflection accuracy is not high, and here we can notice that solar radiation from my cheap mirrors focuses on this area with a height of less than 1 m.

I use this mirror system for a small solar space heating of the house, and now we are inside it. It is the solar radiation from my cheap mirrors, and it increases the well-known phenomenon of heating our homes through their large windows.

In addition, I use my mirror system to add extra solar radiation to my greenhouse. The mirrors heat these 60 liters of water during a sunny day, and the warm water heats the greenhouse at night.

I remind you that this version of my mirror system was used to heat 50 liters of water in this tank of hot water supply to my summer cottage. Now my system consists of strips of old glass mirrors, and they are absolutely motionless from morning to evening because they are located along this West-East line.

Let's look at how this spot of solar radiation from the immovable mirrors moves during one day, from morning to evening. It is morning, and the spot is here, and these are time points during one day of the 3rd of July. We see that the spot trying to hit this line all day long, and I remind you that the mirrors are motionless.

Now I will remind you of a similar experiment, but in a different situation, when my immovable mirrors were installed much closer to the white screen. This experiment was during one day of the 6 of July, three days after that experiment with distant mirrors. We can notice that the closer we place the mirrors to the solar heater, the slower this spot of solar radiation moves in this horizontal direction.

That is why the near location of the mirrors is more preferable in such a situation, when the width of the solar heater does not exceed several meters. But the difference between the near and distant location disappears in such cases when the mirrors direct additional solar radiation onto a long row of solar collectors.