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What is the whole heat exchange fresh air ventilator?
Second, the new insulation decorative board is integrated through the production line, set insulation, waterproof, finishes and other functions in one, is to meet the current housing construction energy needs, improve the industrial and civil building exterior wall insulation level of the preferred material, but also on the existing Building energy-saving transformation of the preferred materials
I added the space 18 degrees opened for 5 hours or not cold, we all know how is it? More
Common points are all sandwich panels, with a hard protective layer, the difference is the middle of the different materials, such as polystyrene board, polyurethane board. Polystyrene board which is the most common, because the price is cheap, easy to use so the use of more, but if the temperature is more than the requirements of the chicken inertia glycosylation moxibustion slim faint words, polystyrene board is not satisfied , So there is a polyurethane sandwich panels, polyurethane thermal conductivity of less than 0.. in the existing insulation materials, large quantities of processing, be the best. But because of its process is more complex, and the cost is relatively high, so with less, the common combination of cold storage and the like, I believe that with the economic and technological development, polyurethane sandwich board market share will be more and more High
Air to water heater host and air conditioning host is not the same
This test with a small sample length 127mm, width 12.7mm, the maximum thickness of 3.2mm. In the absence of ventilation test chamber. The top of the specimen (6.4 mm place) is clamped with a clamp on the bracket and the longitudinal axis of the specimen is kept vertical. The lower end of the specimen is 9.5mm from the lamp tip and 305mm from the dry absorbent cotton surface. Bring the Bunsen burner and adjust it to produce a blue flame with a height of 19mm. Place the Bunsen Lights flame at the bottom of the sample for 10s, then remove the flame (at least 152mm away from the specimen) and write down the sample. Burning time. If the flame of the sample within 30s after removal of the flame is extinguished, the original lamp must be moved under the specimen again, re-ignite the sample for 10s, and then remove the Bunsen burner again and note the flame burning And flames burning the burning time. If the sample droplets drip, let it fall into the sample under the 305mm cotton, to see whether it ignited cotton. If the absorbent cotton is on fire, the rating should be taken into account. Specific grading indicators are as follows. Test Item 94V-094V-194V-21 Ten-time ignition Total flame burning time Maximum value (S) Individual flame burning time Maximum value (s) Flameless burning time (s) Yes Flame drop No No Allow only short time Burning general UL yellow card on the thickness of the test strip is divided into: 1/8 inch, 1/16 inch, 1/32 inch thickness, that is, 3.2mm, 1.6mm, 0.8mm three grades test.
HVAC Heating: What are the main components of the air distribution system?
The reasons are the following: 1. Household electricity is not enough, can not start the compressor, so in the heating state can only be ventilated state, cooling the state directly jump electricity; 2. See if you are reported failure, Code to determine the need for on-site inspection in order to know the specific situation; 3. Four-way valve should be no problem, do not just believe that this is the problem Oh; help your words to adopt
If I feel the room cool off, one hour hot and open an hour this will be more expensive? More
Common scaffold brace is the U-type care, "construction of fasteners steel scaffolding safety technical regulations" (JGJ Gong Gong Duo Ji-tao pan Revenge two 130-2011) provides "adjustable support bearing capacity design value is not Should be less than 40kN, the support plate thickness should not be less than 5mm ", the general calculation using 30kN.
Ventilation is very good, why still have to install fresh air system
Also known as foam board, EPS board, is containing volatile liquid blowing agent of the polystyrene beads can be preheated by heating, heated in the mold and the formation of white objects
External wall insulation method of operation There are several combinations of materials
30-150 per square meter has, mainly to see the material, thickness and so on
Air conditioning ventilation when the sound is a big reason
According to my specific circumstances, in the following seven major hazards include the division, sub-project focus on control