Thank you for posting this very informative talk, being at 41deg south latitude(Australia) obviously will need to modify this for the climate since it isn't Alaskan climate but very informative. Wished there was more builders/designers such as yourself. Just had to always remember you were talking Farenheit temps as I kept getting confused with Celcius.

thank you for your time and information I live in Australia still works here we have snow in winter and 40 plus in summer in southern states please keep up the fantastic work

Thorsten Chlupp . das Beste was Deutschland nach Alaska exportiert hat!

Will be really interesting to scale this huge hot water tank for warmer climate. Very interesting solar system. I'm watching your video over and over again, and always finding something new.

Thank you.

Very good presentation !!! Lot of new information learned and lots of inspiration. What happened during the summer ? Is there are need for cooling the house?

What was the per square foot cost of the client's house Mr. Chlupp built?

@estqwerty Thanks, glad there was something interesting for you. I converted the system to drain back, problem solved. In my climate with proper design there are no issues with overheating. An evaporation pond in front of the main window provides natural passive cooling in the summer. Best - TC

41:38 Temperature/Thermal Energy is essentially just the amount of vibration in a molecule. That molecule hits other molecules and they begin to vibrate also, and gradually this vibration creates a gradient towards areas with less vibration (cold). Molecules are not actually moving through the wall in any major fashion. Insulation works because it is largely air, and there are very few molecules for each to bump into, so collisions are happening at dramatically lower rates. The reason a simple air space doesn't work is because air tends to rotate when one side is a different temperature, and we get the highest energy air crossing the space and then touching the cold wall, or convection. Aerogel is the best insulator on the market because it has the highest % air, while still preventing any air movement.

what is the name of the tape that you used on the plywood? where can you get it?

17:59 Stating the energy demand as a per square foot, rather than a per external area is incorrect. As is said later on, square or even octagon buildings, have higher sqft to external area ratios and are intrinsically more efficient.

have you looked at using solar hot air collectors on exterior walls? something such as solarwall is doing?

2:01:00 Ugh. Hydrogen? And then he follows with this comment on Geothermal "how much energy does it produce for how much is put in?"