How to choose a good floor heating for family decoration?
Since it is a choice, there must be a basis. This article is the basis for you to choose a good floor heating. ?
Directory:?
Chapter 1 Industry and Market Situation?
Chapter II Classification and Composition of Floor Heating?
Chapter III Brand and Price of Floor Heating?
Chapter IV Matters needing attention in construction and use?
Chapter V Sharing of Architectural Use Case Diagram?
? 1. Industry and market situation?
Industry: brand manufacturers → distributors → owners?
HVAC and comfortable home are big industries, while floor heating is a small industry. In the floor heating industry, the owner buys materials, equipment and installation services from the exhibition hall of dealer stores. Dealers obtain agency rights from brand manufacturers and purchase goods for sale. There are basically no factory direct stores. ?
As a distributor of comfortable home industry (HVAC company), its business scope generally includes four parts: heating (floor heating, radiator), air conditioning, fresh air system and water purification system. It is recommended that car owners choose a large one when shopping around. In this way, the comfortable home part can be docked with a merchant, which can save a lot of effort. Moreover, a large HVAC company can represent a good brand. ?
Market: central heating in the north and household heating in the south.
In the north, radiator was used for central heating in the early days, but now there is floor heating for central heating. This also brought about the change from radiator to floor heating. There are few commercial houses without their own heating. ?
In the first-and second-tier cities in the south, there have also been floor heating hardcover rooms in recent years, which can be thought of without mentioning the quality. More is household heating, especially in cities along the Yangtze River, such as Shanghai, Wuhan, Changsha and Chengdu. If you still think that heating is only something in the north, you may expose your income level.
_ The content of this paper is mainly aimed at household heating in southern home decoration. ?
Second, the classification and composition of floor heating:
Circulating system and electric floor heating, wetland heating and dry floor heating.
It should be noted that both the liquid circulation system and the electric floor heating can be dry or wet. Water and electricity are different heat transfer media, and the wet and dry installation processes are different. According to the data of wood and inch, the proportion of wet circulation system is far more than half, while the proportion of electric floor heating and dry floor heating is relatively small. ?
So how to choose specifically? The heating area (non-indoor area) is less than 40m2, and electric floor heating is recommended. There is a strong demand for floor height, and I want to save 2-4cm height and choose dry type. ?
Compared with wet circulation system, dry circulation system has the disadvantages of imperfect materials and lack of construction experience, which leads to high failure rate in the later stage. Therefore, the wet circulation system is recommended for general home improvement, and the floor heating occupies 4-5cm. ?
Four systems: heat source, control, pipeline and heat preservation.
Desktop computers have assembly machines and brand machines. The motherboard in the assembly machine may be Gigabit, the hard disk may be Western Digital, the CPU may be Intel, the memory stick may be Kingston, and the power supply may be Hangjia. Each component has many brand manufacturers. ?
The floor heating system is like an assembly machine, and the brands of heat source, control, pipeline and insulation are different. Dealers represent one or two of these brands. For example, heat source agent A brand wall-hung boiler, control agent B brand, pipeline agent C brand and heat preservation agent D brand. ?
Heat source: wall-hung boiler/air energy heat pump/ground source heat pump/solar energy/electric energy, etc. Commercial housing can have heat sources, while villas generally have main heat sources and standby heat sources. ?
Control: water separator, water collector, electric heating executive valve, temperature controller, etc. ?
Piping: main pipe, coil pipe, pipe fittings, etc. ?
Thermal insulation: thermal insulation board, reflective film, boundary thermal insulation strip, aluminum foil tape, etc. ?
? Third, the floor heating brand and price?
Brand: brand origin ≠ origin
German brands do not mean that all products are produced in Germany, but may be OEM in other countries or produced at home. Listen, the name of foreign flavor is not necessarily a foreign brand, but it may be produced by a small domestic workshop. The most basic way to distinguish is to ask "Du Niang" and experienced friends. ?
There are many brands at home and abroad, so it is impossible to list them one by one. Here are some familiar ones in no particular order. ?
Some brands of gas-fired wall-hung boilers: Weineng (Germany), Bosch (Germany), wiesmann (Germany), Earl (Germany), ariston (Italy), AO Smith (USA), Frekai (France), Linnei (Japan), Squirrel (China), Haier (China) and Midea (China)?
Some air energy brands: Midea (China), Gree (China), Haier (China), Tsinghua Tongfang (China), EK (Italy), Nuentai (China), Fenez (China), Zhongguang Otis (China), Hot Cube (China), Alpur (China) and Huatiancheng (China).
Now the competition in this market is very fierce, which is a bit like a fresh air system. There are many companies that plunge into it and don't want to miss the wind. ?
Some brands such as temperature controllers and distribution manifolds: Siemens (Germany), Omron (Japan), Hailin (China), Danfoss (Denmark), Manfred (China), Kangnaifu (China), Shi Ming (China), Irvine Top (Germany), Sunwell (Hong Kong), Iva (Italy), VAV.
Some pipe brands: Ruihao (Germany), Oberno (Germany), Giacomini (Italy), Honeywell (USA), caleffi (Italy), George Fisher (Switzerland), Aikangbaoli (China), Fist (China), Kinder (China), Wei Xing (China) and Jinniu (China). ?
Some brands of insulation materials: Dow Chemical (USA), Owens Corning (USA) and Lu Yu (China) are all light goods, and the import freight cost is too high. Foreign brands are also domestic OEMs.
Like the computer brand mentioned above, there is a momentum in the floor heating industry, that is, all four parts are one brand. Of course, not all the parts are produced by our own factory, but more is to find other factories for OEM according to our own standards. ?
From the owner's point of view, it is actually more convenient. You don't have to spend time and energy to understand the floor heating, just find a brand. Just like when we buy notebooks and mobile phones, we don't need to know who made the accessories inside. Packaging floor heating into a whole product and delivering it to the owner should be the future of the industry. Of course, HVAC companies are doing the same now, but the degree of packaging is not enough. ?
Price: Configure Quotation
The quotation sheet is the quotation sheet of floor heating design and materials provided by HVAC company to the owner, which is usually an Excel form or PDE document. The design part includes heat load calculation and coil design in each area. Generally, the material part is 4+ 1, 4 is four systems and installation accessories, 1 is the installation cost and labor cost, and part of it is brought back for filling. The general quotation is not the final price, but the discount price is. ?
Pay special attention, remind again: foreign names are not necessarily imported brands, and imported brands may also be made in China. ?
The whole configuration is roughly divided into four gears:?
1, all imported brands+green feather insulation?
2. Boiler import+other domestic products?
3. All domestic brands
4. Domestic boilers+other unknown brands. ?
Thirdly, reduce materials and accessories and cut corners. I have seen 100 flat floor heating, and the insulation layer is only a few millimeters.
The overall quotation gap is roughly what it looks like in 50 yuan, namely 350 yuan/m2, 300 yuan/m2, 250 yuan/m2 and 200 yuan/m2. ?
Attention:?
1, the price is for reference only, and the consumption level and pricing strategy of different places are different. ?
2. Because the price of wall-hung boiler is basically fixed, the unit price of small area will be higher. ?
3. In fact, some of them exceed 350 yuan/m2, and some are lower than 200 yuan/m2. The high price may be due to the good construction of materials and equipment, or you may have been cheated. ?
? Four. Precautions for construction and use?
Construction: three materials and seven points construction?
Only the floor heating construction has 15 pages in the national standard "JJ142-2012 Technical Specification for Radiant Heating and Refrigeration". Here we will talk about the ones that are easily overlooked. ?
Construction sequence: material approach → insulation layer → coil pipe → distribution main pipe → main pipe → compaction → temperature controller → wall-hung boiler → backfill layer → secondary compaction (some sequences can be adjusted)?
1, hydropower pipeline layout, preferably slotted and buried. If you leave in disorder, it will be difficult to construct the insulation board and ensure the insulation effect.
2. In principle, there can be no cross construction of other types of work during construction, and drilling, drilling and nailing are strictly prohibited. The ground flatness shall conform to the guiding principle of 2m≤3mm. ?
3. When the materials enter the site, it is best for someone to check whether there are any small accessories missing, whether the brand specifications are correct and whether the packaging is in good condition. ?
4. The thermal insulation layer includes extruded board, reflective film, boundary thermal insulation strip and aluminum foil tape for sealing the gap. The material and construction quality of this piece directly affect the later use fee. Construction principle of insulation layer: completely cover into a whole, and bypass the fixture. Thermal insulation is a system, and integrity is very important. There must be no omission in the heating area, and it must be fully paved. Cracks are easy to become thermal bridges and need to be treated. If there are large-area fixtures such as bathtubs and wardrobes, there is no need to lay them. ?
5. The high probability of water leakage in the later period is the coil problem, not the poor quality of the coil, but the damage of the coil. Therefore, special attention should be paid to drilling, drilling and nailing in floor heating construction and later decoration. During construction, the coil can't have dead folds and seams, and the spacing should be even, and the spacing can be reduced at the window. The middle area of the double hall is large, so expansion joints should be installed. The pipelines below the distribution manifold are dense and the heat is too high, so the water inlet pipe needs to be sheathed with heat insulation. When the coil can be fixed, the use of clips should be less than more. The length difference of each coil should not exceed 15%.
6. For the heating area exceeding 100 square meter, it is recommended to install mixed water to improve the system performance. The distribution manifold is usually installed in the middle of the house, which is convenient for the design of coil length. Usually, a room has a temperature control coil, and a large room like a guest restaurant usually has 2-3 coils, but a temperature controller can also be used. ?
7. Generally, villas have standby heat sources and water tanks, and the needs of domestic hot water circulation should be considered when designing. ?
8. If the height of the ground allows, the thickness of the filling layer should be 4 cm. When backfilling, be careful not to scratch the pipeline, so as not to run under pressure in the later period and the pipeline will break and leak. The practice of laying tiles directly without backfilling remains to be verified, and it is not recommended for the time being. ?
9. The bathroom can be paved with floor heating, with waterproof layer before paving and after backfilling, and water stop wall at the door. The floor heating and heat dissipation in the bathroom is limited, and the water will take away the heat on the floor when taking a bath, so other heating equipment is needed. Such as yuba, heater, electric towel rack, etc. ?
10. Floor heating can only be installed during decoration. Only surface-mounted radiators and air conditioners can be selected for heating after renovation. ?
Usage: energy-saving misunderstanding?
1, unlike air conditioning, floor heating is not available at any time. It takes a long time to turn it on, and no one can turn down the temperature during the day. Do not use for a long time or need to drain water in winter to prevent the pipeline from freezing and cracking. ?
2. Pay attention to cleaning every 2-3 heating seasons. Every time the scale in the floor heating pipe accumulates 1mm, the room temperature will drop by about 6℃. ?
3. The most energy-saving way of floor heating is to do a good job of building insulation. Although we can't build a building with zero energy consumption, we can do our best to keep the doors and windows, walls, roofs and floor heating warm. A case shows that the monthly heating cost of a 300-square-meter villa is around 300 yuan. ?
4, choose this piece of furniture, especially the bed needs to choose feet to increase the heat dissipation area of the bedroom floor heating. You can't install floor heating under tatami, so you need to pay attention. Floor heating can not have a large area of carpet, which will affect heat dissipation. ?
? V. Share the construction case diagram?
Traditional wet circulation system?
Traditional wet electric floor heating?
Wet circulation system module
Dry circulation system module?
Dry electrothermal floor heating module?
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