Flying Eagle Club Fu Ji presided, Bao Huitang and Gao Cuifeng again, so what did Hong Tao do? He became a mason instead, but instead of building a house, he built a kang on a pan. It's not a kang yet, it's a batch.

There are many pavilions and pavilions in Qionglin Garden, as long as it is a well-sealed house, Hong Tao has to requisition, as a warm house for rice sacs and flower seedlings to spend the winter.

If you don't have plastic film to keep you warm, you'll have to find other ways to raise the indoor temperature. It is a good idea to make a cast iron stove, but unfortunately the time is a little too late, and the house at this time is relatively tall and leaky, and the efficiency is too low if you rely on the stove for heating alone.

So Hong Tao changed his mind again, and he didn't plan to raise the temperature of the whole room, focusing on the seedbed. As long as the root system of the plant is kept at a certain temperature and the outside is not frozen, the plant will not die, and may continue to grow.

In the end, what is the effect, who can get it, it's still the old way, try it.

Pan kang is a technical job, if you don't get it right, it will either not be hot, or it will cool too quickly, or smoke will pour into the house. How to make the soil kang insulated, clean, and has high thermal efficiency has to be played by a master with many years of experience.

Hong Tao happened to know such a person, it was none other than his daughter-in-law's grandfather. The old man has slept on the clay kang for most of his life, and he is a mason himself, with strong hands-on ability, not only to make the kang for himself, but also to help the neighbors, relatives and friends, and leading colleagues to make a lot of dishes, and his skills are very good.

Since the old house was demolished and moved into the building, the old man could not enjoy the ondol. What is a dead eye? This grandfather is. He slept in Simmons and couldn't enjoy the blessing of heating, so he simply rented out the building, and went to the alley to rent two bungalows, and continued to give the kang.

Hong Tao happened to be in a hurry, when the old man was panning the kang, he was fortunate to become a glorious worker, starting from the lump is a strong laborer, and he slept on it for a night when he tried to burn. It was quite comfortable, but the next day the gumbed was swollen and on fire.

The old man said that this is because young people are strong and have not adapted to the kang since they were young, so it would be good to sleep more at the end of the kang. Hong Tao's answer at that time was: Life is thin, you can't enjoy this blessing, so you should come!

Although I didn't enjoy the blessings, I learned a lot of techniques and tricks. The old man is such a small worker, he is still a very curious, very studious worker, in addition to work, chattering does not show off his skills, and he is cheap for his grandson-in-law without a word.

Now Hong Tao plans to try his craft in the Great Song Dynasty, and he also has four small workers and more than ten small workers. These are all masons found by Zhu Bajin, who are the best at building kilns.

"One foot and three minutes long, one foot wide, and three points thick, and two thin branches of one foot long should be added to the middle of the lump as bones."

The first step is to make adobe bricks, this craft does not need to be taught, the masons of the Song Dynasty played neater than Hong Tao, but the specifications and details still need to be emphasized. As for why it is this size, without it, it is this size that Hong Tao learned at the beginning, and it is more familiar to do so.

So why not use ready-made bricks or stones? For the same reason, the old man said that adobe bricks were well insulated, so Hong Tao did not plan to reform.

It just so happens that the cost of adobe bricks is still low. In this era, there is no shortage of labor, those small workers only need to pay 30 yuan a day, and the craftsmen only need 50 yuan, but they have to take care of two meals.

Hong Tao waved his hand, as long as the work is done well, he will do it three times, or do it once! It's not that he's generous, but the money isn't from him at all, and it's all included in the renovation money of Qionglin Garden. Externally, this royal garden is being renovated, and he is generous to the emperor and earns a good reputation for himself.

The four sides of the kang should be built flat with adobe, and the empty place in the middle should be built with vertical adobe to form a Sichuan character, and the head and tail of the kang should be built horizontally with a wall of fire.

The intention of this is that the hot air in the stove cannot run directly from the chimney, but must go back and forth inside the kang body. In addition to changing the direction of the hot air, the two walls of fire, one at one end and one at the end, also play a role in preventing smoke from backing up.

"Half a point higher...... Yes, that's it, the kang tail is one point higher than the kang head! ”

Is it finished just by drying it like this? No, no, no, it's not enough, and that's where the real trick begins. If you want to avoid pouring smoke and the hot air goes smoothly, you must first form a slope surface in order to use the principle of hot air rising. The slope does not need to be too big, a few centimeters is enough, and you can't see that the kang surface is oblique if you don't pay attention to it after you make it.

"Put more tiles here...... Not enough, not enough, come again! ”

It is not enough to make the kang surface slanted, but also to pile up some broken tiles in the internal space of the kang, and also make the kang tail high and the kang head low.

The principle is simple, these tiles act as energy storage devices. When hot air comes, they absorb heat and then slowly dissipate heat, which is the same as the energy storage electric heaters of later generations.

Moreover, they can also change the internal structure of the kang to low in the front and high in the back, which is convenient for the flow of hot air, killing two birds with one stone. Needless to say, the wisdom of working people is unlimited, and they will slowly sum up a set of practical solutions through their daily lives.

At this point, the internal structure of the kang is basically completed, cover the surface of the kang with adobe, and then paste it to death, and then try to light the fire after drying.

Be careful, you must dry it in the shade for a few days, and you can't light it when it's too wet, so that cracks will appear in the mud and wet adobe. Once the kang leaks, let alone the temperature, no one can stand the gas in a room.

"Official, it's hot, it's hot! The three of them lit a fire for half an hour according to their words, and then blocked the stove hole and chimney with weeds, and the kang noodles were still warm when it was still early. ”

A few days later, when Hong Tao arrived at the north gate of Qionglin Garden early in the morning, the craftsman in charge of testing the fire immediately ran out of the hall and reported last night's results with a smile.

At first, they didn't know what they were doing when they first followed the horses, and when they found out, no one believed them. Isn't this crazy, a fire that burns for half an hour can heat up all night?

It's no wonder that a crazy horse is a crazy horse, and if you don't say crazy things, you can call it a crazy horse? For the sake of three full meals a day plus dozens of literary and labor money, no one said anything, and let them do whatever they wanted. I didn't see that there was still a forbidden army guarding the door, this is for the royal work, or is it better to say less, love is not hot, love is not crazy.

But after a few days of fiddling, two old craftsmen saw a little eyebrow. Although I'm not sure that I can succeed, I don't have the same attitude as I used to deal with, and I should remember the place where I should remember, in case I succeed, this is a craft.

For an ordinary person, learning a craft is equivalent to having a lifetime of jobs, and no job can be with others for a lifetime, only craftsmanship can. No matter what dynasty they came to, craftsmen did not have to worry about running out of food.

Now that they have been completely convinced, they dare not say whether the colt is crazy or not, but they should be sure that these people are fools.

I followed the stupid work for a few days, and I didn't learn all the things, how big the specific adobe is, how high and low the slope, how to build the graphics inside, how many catties of tiles should be placed, no one has remembered it all, just the stove and chimney are used for hair.