The fact that most utility bills are calculated to be significantly lower than the actual cost

The fact that most utility bills are calculated to be significantly lower than the actual cost
I received a photo of the scaffolding removed from the Fukui Passive House I introduced the other day.
Publish.

Although the exterior is unusual for a Japanese house, we took into consideration the balance of the design.
Today we'll be talking about the thermal environment for the first time in a while.
Recently, construction companies, design offices, and other organizations that are very enthusiastic about thermal environments have begun to introduce the Building Fuel Efficiency Navigator.
From then on, people began to offer software that was different from the software they had been using up until then.
I mainly use fuel efficiency navigation now, but until then, I had been using software for domestic practitioners.
I am proud to say that I have actually used it and performed most of the calculations.
I'm sorry to say this, but I don't think there is anyone out there who can talk about as many different software as I can.
There was only one person, Mr. A from XXX Tech in the Kanto region. Of course, he was very particular about one software.
There are many other people who have mastered this.
There are still some software programs available in Japan that calculate Q values and utility bills. However, most of them
The results are based on the software smash, which is based on the government's software simheat, which is an improved version of smash.
They are programmed to get closer because otherwise they would not have the stamp of approval from the country.
However, the results are tricky...
If you calculate your heating and cooling costs based on these results, they will almost certainly be significantly lower than they actually are.
From the initial sales point of view, it may seem like "it's easier to sell because the utility bills look cheaper than they actually are."
The truth will come out in the first year. If you are really calculating your income and expenditures based on this amount,
This is a scary thought that could lead to people saying, "This is a scam!"
In fact, recently, our company calculated the heating load using a certain domestic software.
When comparing the results from the Fuel Economy Navi, the value calculated by the Fuel Economy Navi was 1.56 times higher.
Similarly, my friend S did the same comparison, but the fuel economy navigation system gave a higher value by 1.79 times.
出ました。
Both myself and Mr. S have delivered a large number of cases so far, and have accumulated data on actual temperatures and utility costs.
Yes. When comparing them, it is clear that the fuel economy navigation system gives closer values.
This is not just a story that I and Mr. S have to tell; it's something that I hear quite often from other construction companies across the country.
I didn't take a lot of statistics, but I'd say it's about 1.5 to 1.8 times.
I think it's often somewhere in between.
So what is smash, the national standard?
It's too expensive for how hard it is to use, and there's no sign of it being updated, so I've been using it for years.
I haven't used it at all. The last time I saw it was 20 years ago, during the Windows 95 era.
There was probably nothing different from what I saw on the screen.
That's something that would normally be unthinkable with computer software...
I can't reveal my identity, but I heard from a reliable source that
"There are many areas where we would like to improve the software, but it is a national standard.
The reality is that "no improvement is permitted."
The opposite of that is Fuel Economy Navi. The original engine, PHPP,
Improvements are made every year to narrow the gap between simulations and actual measurements.
They are so persistent that it makes you want to say, "You don't have to go into such detail."
In addition, the basic concept is to "calculate as unfavorable as possible, so that the result is slightly worse than the actual measured value."
This way, practitioners will not be accused of fraud.
Fuel efficiency navigation systems are also moving in the direction of "deteriorating" their calculation results in order to receive the government's approval.
It is possible to do so. However, there is no way to do this at all.
It doesn't seem to make sense to me. In fact, I feel like it's something I shouldn't do at all.
I'm sure there will be pros and cons, but I'd love to hear your opinions.