“Creating a healthy house with positive thinking” published in 1994
Japanese customs “Koromogae” means to change clothes every season. Mainly changing to summer and winter.
In order to make a current ordinary house to a healthy house, it is necessary to think of Japanese customs KOROMOGAE .
The climate of Japan is characterized by drastic changes in the four seasons and high humidity, except in Hokkaido.
※Kenko Yoshida wrote in Tsurezuregusa, “It should be a cool house in the summer when you build a house.” It is a measure against high temperature and humidity, but how about winter?
It is “We can live everywhere in winter.”
In other words, we should wear heavy clothes in winter. It would have been impossible to build a warm house in winter with old technology.
But what about modern technology?
I often hear the catchphrase of a house that is warm in winter and cool in summer, but is that true? If you read it carefully, it is premised on heating and cooling. Unfortunately, it is not so easy to build a house that is warm in winter and cool in summer by using architectural methods on the premise that no equipment is used.
Why is it so? Now, let’s respect Yoshida Kenko and think of summer as cool. Since we don’t rely on equipment, we have no choice but to ensure thorough ventilation. On top of that, we will have no choice but to overcome the heat by devising ways of living such as blocking the west sun and sprinkling water. But the winter in this house will be extremely cold.
On the other hand, modern homes have become more airtight, have private room plans, and have better heating. It can be said that winter is much warmer than it used to be. However, in the summer, on the contrary, the ventilation became poor, and the heat and humidity did not escape and became muffled.
However, if you are serious about your health, you should avoid relying solely on equipment.
Building a house, let’s try to make a house architecturally as much as possible.
Then, I came up with the idea the house itself do KOROMOGAE.
In the summer, it is very airy, and in the winter, the blessings of the sun reach every corner of the house. Just as people change their clothes, it is a natural premise that housing should be switched in winter and summer, and that humidity should be taken into consideration.
In order to do KOROMOGAE of the house, we have to overcome some contradictions.
In the summer, it was thoroughly ventilated, but in the winter, this ventilation must be eliminated. However, if you lose the ventilation, the humidity will be trapped.
In summer, I don’t want to get the heat of the sun. But in winter, I want to take in the heat of the sun to every corner of my house. In winter, I don’t want to let the heat inside the building escape, and in summer I want to let it escape.
The problems of heat, cold, and humidity must be solved in a single building at the same time in summer and winter, if we can not do so ,which is useless for actual make a housing .
Here, let’s touch on the concept of healthy housing PAC that we pursue. P is passive, A is air, and C is cycle. The basics of a healthy house are sunlight and ventilation. It can be said that P is the blessing of the sun and AC is well-ventilated.
Passive came from Passive Solar House. There are two types of solar houses, which are designed to save energy by incorporating the blessings of nature such as solar heat into the house.
One is to use equipment, which is a type in which a heat collecting plate is installed on the roof and water or air is passed through it to take the solar heat and used for hot water supply and heating / cooling, which is called active solar.
The other is a type that utilizes the blessings of nature by devising architectural methods without using large-scale equipment, which is called passive solar.
The life of machinery and equipment is about 10 years at the most, and considerable maintenance is required. If it can be realized by a building method, its performance life will be the same as the building life, and maintenance will be much cheaper than equipment.
PAC houses use architectural methods (passive) such as floor plans, construction methods, and devising windows. In winter, they take in solar heat and living heat and circulate them in the air flow to every corner of the building (air cycle).
In the summer, the outside cold air at night is taken into the building and the hot air in the daytime is released, so it is a house where you can change clothes to cope with the cold of winter and the heat and humidity of summer. It is KOROMOGE home.
KOROMOGAE is extremely easy. The ventilation openings attached to the foundation and the ventilation openings attached to the roof ridge will be opened in the summer and closed in the winter.
Approximately, the summer is from April to October, and the winter is from November to March. The mechanism itself is extremely simple, but in reality it is composed of a combination of various know-how.
※ Yoshida Kenko （ A.D. 1284－1350）was active as an administrative officer, Buddhist, poet, and essayist from the end of the Kamakura period to the Nanbokucho period. His representative book is Tsurezuregusa.