Air conditioners should be designed so that you can choose between 36 or 40!

Following on from yesterday, this is about air conditioners.
When most people buy an air conditioner, they look at the size of the room and decide to buy it.
I think that even electronics stores have decided on this.
However, if you decide based on this, it will usually be too big for a newly built home.
This means you are selecting the model.
I wrote an article on how to properly select the right model.
The easiest way to find out is to read the April 2012 issue of Architectural Knowledge.
(Or rather, there is no other formula that can be used to easily calculate it.)
As I wrote in the book, the air conditioner is for a 6-tatami room (with a cooling capacity of 2.2kW in the model number).
The most common sizes range from 22 (which is an abbreviation) to 23 (for 71 tatami mats).
Most manufacturers offer
6 tatami mat room 22 6.9
8 tatami mat room 25 6.9
10 tatami mats 28 6.9
12 tatami mats 36 6.3
14 tatami mats 40 6.3
16 tatami mats 50 5.7
18 tatami mats 56 5.4
20 tatami mats 63 5
23 tatami mats 71 4.7
There are 9 types, but 50 is often not available.
The APF (year-round efficiency) for a certain model is shown on the right.
Looking at it this way, it is clear that as capacity increases, efficiency also increases.
I know it's going to fall.
However, on the other hand, the price per capacity generally increases as the capacity increases.
However, the numbers above 50 are significantly lower than those below.
Sometimes the price doesn't go down as much as you might expect because of low sales.
Also, even if you choose a model this large, the effect will be less the further away you are from the air conditioner.
It's inevitable that it will get worse.
Taking all of this into account, the most cost-effective option is 36 or
That means 40 air conditioners.
The dimensions are listed as 12 tatami mats and 14 tatami mats, respectively.
The majority of the homes we design are between 30 and 40 tsubo in size.
This is equivalent to approximately 99m132 to XNUMXmXNUMX.
This translates to 60 to 80 tatami mats.
In this type of house, we install one 40cc air conditioner on the first floor and one in the attic as standard.
This is the most common pattern right now.
One of these units is used for heating on the first floor for 1 to 1 hours from 11:7 p.m. to 3:8 a.m. (depending on the resident)
As long as the heaters are turned on, the entire building will be warm enough for most people to feel comfortable.
Of course, it depends on the temperature setting and operating time, but if the average temperature on the first floor is about 1°C and the average temperature on the second floor is about 20°C,
It's quite possible.
If you are sensitive to the cold, you could set the temperature to 1°C on the first floor and 22°C on the second floor.
However, if the entire building is kept warm, the walls, floors, ceilings, etc. will not get cold to the core.
The temperature is kept relatively high. Therefore, the air temperature is about 3 degrees Celsius lower than in an ordinary house.
Many people say that it's warm even at low temperatures.
In fact, when we came for our annual inspection last year, the wife boasted, "I'm very sensitive to the cold!!"
It was 1 degrees Celsius on the first floor, and I was surprised and asked, "Isn't it cold here?"
When I asked him, he replied, "There's almost no difference in temperature no matter where you go, so it's fine.
"I wasn't sure what Mr. Matsuo was saying, but I was surprised," he said.
On the other hand, there is only one air conditioner installed in the attic. However, when you want to cool the first floor,
I also use the air conditioner on the first floor. I distribute the cold air from the attic air conditioner to the corner room, but this method is
It's still in the process of being improved.
All the practitioners are very concerned about "What should the performance of the house be?"
One of my solutions to this problem is, "For a house up to 40m², use 40 air conditioners for heating.
I think the compromise would be to have one unit for heating and one for cooling (two if you include the first floor) so that the entire building is comfortable.
We need to be very good at designing in a way that is sensitive to the sun (passive design) while keeping costs down.
I don't think this is possible.
This is currently the minimum standard for Matsuo Design Office.
The reason why we chose an air conditioner is because it can be used for both heating and cooling, and is also energy-efficient.
Low cost and humidity control for dehumidification, a must-have in Japan
This is because it is the most cost-effective machine at the same time.
Passive House Standards are a much higher standard than this
There is a much lower standard called the next generation energy conservation standard.
Passive House Standards for those on a budget
The standards that I have introduced to everyone today are my current policy.