Attic air conditioning cooling and underfloor air conditioning heating

Effective combination of attic air conditioning cooling and underfloor air conditioning heating

Underfloor air conditioning heating

The features of underfloor air conditioning heating are:The floor gets warmNo matter how well-insulated and airtight a house is, if you use a wall-mounted air conditioner for heating, your feet will still be cold. If you use an underfloor air conditioner for heating, you can use it not only for the living/dining/kitchen area, but also for the bathroom and toilet.The whole house will be easier to keep warm through the underfloorHowever, because the temperature is below 24°C, there are no restrictions on floor materials, unlike underfloor heating.Solid wood flooring can be used normallyThis is also a major advantage.

I think that the first person to start using underfloor air conditioners was Nishikata-sensei from Akita, and the second was me. After that, the number of construction companies imitating my method increased dramatically after they saw the article I wrote on page 2012 of the April 4 issue of Architectural Knowledge. I think this caused a huge boom with over 75 companies imitating my method all over Japan. However, underfloor air conditionersAt a minimum, the insulation and airtightness must be such that the Q value is 1.9 or less (UA value is 0.57 or less) and the C value is 1.0 or less.Things,Unless you provide proper instructions on how to operate the heating system, things will not go well.As a result, many construction companies also failed.

The amount of heating costs that can be kept low while heating the entire house depends on insulation, airtightness, solar radiation acquisition, and most difficult of all,Selection of appropriate air conditioner capacity and operation methodSince we have the expertise in this field, many construction companies ask us to teach them our know-how. Technically, it is very simple, butIt's not easy to keep heating costs downThis is underfloor air conditioning heating.

If you use only one underfloor air conditioner, if you set the floor temperature on the first floor to 1°C, the room temperature on the first floor will be 1°C, and on the second floor it will be around 24°C. Also, most homes have large south-facing windows. This means that from 1am until at least 22pm,During sunny days, the temperature can be kept above 20°C even with the heating off.Some people dislike the warm air from the air conditioner, but it is not on during the day. At night, I sleep on the second floor, soThere is no moment when I feel the warm air.This is a major advantage.

Also, since we use general models that are listed in a regular catalog, it is difficult to know what will happen after 10 years or more.Easy to replace and maintainSome people worry about dirt under the floor, but I have checked the floors of many houses that are about 10 years old, andAlmost like new and no issues whatsoever..

The next thing people start saying when they start living in a warm, well-insulated house is that it's "dry". This can be easily avoided if you plan to humidify the entire house from the beginning. If you can humidify properly, it's not only good for your skin, but it also reduces your chances of catching a cold or the flu.

Attic air conditioning cooling

Even more than heating, the Japanese housing industry is completely lacking in cooling and dehumidification planning.Less than 2% of companies have a proper cooling plan for each room on the second floor.It seems.

Most people want the living/dining/kitchen room and bedroom to be comfortable, and also the dressing room, which is a short space. If you are only thinking about a married couple, the bedroom only refers to the master bedroom, but children's rooms are also fine bedrooms after they start using their own rooms. Of course, this can be solved by installing air conditioners in each room, but this is very expensive, and in high-performance homes, even the smallest 6-tatami mat air conditioner can be used.In a high-performance home, the capacity is significantly exceeded.In addition, the exterior of the building will look dirty, covered with pipes and outdoor units. As a result, fuel efficiency will be significantly reduced, and the air conditioners installed in each room will blow too much cold air, which will be the main cause of air conditioning sickness and discomfort.

To solve this problem, we use a method called "attic air conditioning cooling."Install one air conditioner in the attic to cool the attic.The cool air is then distributed to each room using fans. At this time, the room temperatures are about 24°C in the attic, 2°C on the second floor, and 27°C on the first floor. In a well-insulated, airtight, and perfectly designed solar shading system, if you use an attic air conditioner for cooling, even if you leave it on for the whole month of August,Most households spend between 4000 and 5000 yen a month on air conditioningIn our homes, if you adopt a normal lifestyle of turning off the air conditioner every now and then and using it in conjunction with ventilation because it's "wasteful," your air conditioning bills will actually go up. When you're sleeping, the air conditioner is running weakly somewhere far away, and only a slight breeze is distributed to each room by the fans. Therefore, the indoor environment isA state of near insensitivity to heat and coolness, such as in spring and autumn.Of course, it is difficult to prevent this from happening if you are exposed to air conditioning or high humidity.A life almost free of mites and mold.

In addition, when the air conditioner is turned off, 700g of moisture accumulates inside. This is not hygienic. Our company uses air conditioners that can sterilize by heating at 50℃ or higher as standard, so if you sterilize by heating for about an hour once a month,Even if mold grows inside, it can eradicate over 99% of it.If you can do this, you will basically not need professional cleaning, which costs about 2 yen every few years. Compared to installing air conditioners in each room, the replacement cost is very cheap, as you only need to replace one unit.

The polar opposite of underfloor air conditioning for heating, attic air conditioning for cooling is very easy to keep cooling costs low, but technically it is very difficult. There is a reason for this. Unlike the first floor, the rooms on the second floor are divided into individual rooms. Also, most people close the doors to each room when they go to sleep. In order to make it work evenly in this situation, it requires a series of subtle design ideas that are not obvious just by looking. If a construction company that does not know how to do this just tries to copy the form, there is a high probability of failure.

In this way, it is ideal to combine attic air conditioning cooling with underfloor air conditioning heating.

In particular, attic air conditioning for cooling is effective in the summer, and underfloor air conditioning for heating is effective in the winter.

By using both an attic air conditioner for cooling and an underfloor air conditioner for heating, you can create a more comfortable living environment.

Underfloor air conditioning heating is gaining attention as a way to take advantage of the benefits of both attic air conditioning cooling and underfloor air conditioning heating.