A Solarium Can Heat your Home 

If you can open it it would be interesting.

He's in Australia, it's winter there in July. The degrees he mentions are in Celcius.

thats why you have a way to cover it up in summer then your good :D

I know by experience that it ABSOLUTELY will add heat to your home in summer-more heat than you will want, even if the side walls are an open porch. You have to build ventilation into the top of the slope to let the stiflingly hot air flow out. Another thing: there's not much slope to this roof, and it's very broad. That means that whatever small debris falls on top of of it STAYS on top of it. It might look good immediately after you build it, but after only a week it will show a buildup of crud. That's when you find out that you can't reach enough of it for cleaning, and you've failed to build in enough support underneath it, so you can't stand or crawl on the polycarb to scrub it. And you will have to scrub it; hosing it off will not work; it will just provide more growth medium for algae. Build a cover for it to shade it in the summer? Sure. That means you're building TWO roofs, one of them portable, or retractable. Don't forget to build in enough support for the extra weight, and some engineering for taking the cover on and off. Plan on replacing the polycarbonate after a few years, because it's not metal; it's brittle, and you WILL experience high enough winds to crack and rip it from the screws. I'm not saying don't do this project. I did it, and I learned by experience that this video seriously misrepresents how easy it is to maintain, and how to build it so that maintenance is possible.

Shades for the sides and shade cloth for the top

Thanks so much for sharing all the lessons you’ve gained. It’s much easier for me to learn from others experience than having to go through it myself. Thank you! You saved me so much headache by giving me all this foresight.