[pjerem]

Yeah you are right.

A modern building with modern and super expensive insulation use less heating power. Ironically the second comment of your video says "Actually the major key to success is an unlimited budget."

What a discovery. That's not the case of 99,99% of buildings on this planet though.

However, the article you are commenting just says that before buying tens of thousands dollars of insulating material that you'll have to install somehow, the first thing you can do is wearing a pull over and a pair of socks.

Nobody says that you have to choose between insulating your home or your body. Just do both if you can.

[throw0101c]

> What a discovery. That's not the case of 99,99% of buildings on this planet though.

Which is already being addressed:

> Key to the PGH approach is balancing expenditures and gains. Where other programs use specific energy-use targets or other criteria, and the building code establishes a baseline (“the worst house you can legally build”), a PGH goes above code until it stops making financial sense. On some new homes, that may be not far above code, and on other projects performance may rival that of a Passive House, but in most cases it will be somewhere in between those two standards.

* https://www.prettygoodhouse.org/economics

Being able to live at 22C, 40-60% RH, and filtered air exchange via ERV, isn't as difficult as going to the moon. An increase of 5-10% in building cost for better air sealing, a little more insulation (and reducing thermal bridging), and some mechanicals isn't crazy.

[pjerem]

> An increase of 5-10% in building cost for better air sealing, a little more insulation (and reducing thermal bridging), and some mechanicals isn't crazy.

Yes but you forgot the part where the vast majority of the world population don't live in a brand new building.

Insulating my not so old house (1998) to be up to the modern norms would cost me something like 50/60k€.

[throw0101c]

> Insulating my not so old house (1998) to be up to the modern norms would cost me something like 50/60k€.

I grew up in a house built in ~1898. I know about old houses. There was still some piping in it for gas lighting (before electricity was "invented").

[hd95489]

But it is crazy a new home is like 300k just for the house maybe closer to 400-500k for anything decent on the coasts. 30-50k buys a lot of electricity or nat gas.

[bluGill]

Great insulation is not very expensive. It is somewhat more expensive, but not a whole lot. We are talking about a few thousand dollars on a project that will already cost you upwards of $300,000 (assuming you already own farmland you want to build a 5000 square foot house on - farmland because it implies cheaper labor than in the city)

[pjerem]

You are talking about a new construction project. On this you are right. Been there, done that.

However most people in the world already live in an existing building. Insulating an existing building is not what I would call cheap, especially if you are still paying a mortgage.

[bluGill]

There is for sure less you can do for existing construction, but it isn't nothing. There are still a lot of attics in cold places with R10-R20 insulation that can cheaply be brought closer to R40-R60. (About a month ago I bought my attic to R40 for $4k, remove all old insulation, air seal, and then new )

Most existing houses get a significant remodel once in a while as well. If you are doing that you should bring the changed areas to better code. Much siding only lasts for 25 years, so just put insulation under it while doing the regular replacement can make a big difference as well for not much more since you have to pay for a lot of labor.