Bed bugs have been coexisting with humans since ancient times. Together with him, they got from the caves into modern dwellings. Despite the development of technologies and preparations for combating parasitic insects, they cannot be completely defeated. Bedbugs are naturally very tenacious and quickly adapt to any new conditions in their environment. They also develop resistance to 98% of all insecticidal poisons, with which they are allowed to poison according to toxicity standards. These blood-sucking parasites can appear in absolutely any person. It is enough to bring just one representative of this species to your home, and their population will begin to grow exponentially.
Finding out the reasons for the appearance of bedbugs in your home is important in order to cut off the path of pests entering the home and carry out effective destruction without re-colonization.
Bedbug bites: the surest sign
The only food for bedbugs is human blood. In order to get enough of it and at the same time to protect itself, the bug prefers to hunt in the dark.
It crawls onto unprotected areas of the body, pierces the skin with its sharp mouth apparatus, getting into a blood vessel, from where it sucks out the required amount of blood. At the same time, a special channel in the proboscis allows the bug to release a special substance that makes the skin insensitive for a while, blocking the nerve endings. People often do not wake up from bites and do not feel them.
The regular appearance of bite marks on the body is one of the signs of bedbugs in the apartment.
After consuming the first portion of blood, the bug moves a little further and makes the next bite. The photo shows that the traces of several bug bites resemble peculiar paths:
Feedback:
“We thought that children were allergic, it’s not clear what. There were too many of these red dots. It looked like chickenpox. We began to sort out the products, look at the plants. But I was embarrassed that many points are clearly located along the lines. As if someone is crawling under the skin. So the pediatrician immediately told us that these were bedbugs. They turned over their sofa in the nursery and pumped me out with ammonia. I have never seen such horror before. These bugs swarmed there, like in an anthill ... "
Anna, Kharkov
In addition, the bed bug usually does not touch the hairy areas of the body. He prefers smooth skin that can be bitten quickly and easily. A red spot appears at the site of the bite. A sign of a bed bug bite is severe itching and burning, often severe swelling.
As a rule, traces are found only in the morning and a person can mistake them for an allergic reaction. However, the corresponding drugs do not provide any relief, and the area of red spots only increases every day.
Bedbugs bite everyone, but often women and children are more bitten. This is due to the fact that it is easier for the bug to bite through their thin skin, and the blood vessels in women and children are located closer to the skin.
The number of bites depends only on the population of bed bugs in the apartment. There have been cases when, with a strong infection with parasites on the bodies of people, there were 300-400 bites per night.
It can be argued with all responsibility that bites are one of the most characteristic symptoms of a bed bug in an apartment.It is only important to distinguish them from other insect bites and allergic manifestations.
It is also useful to read: How can bedbugs be dangerous to humans
And one more thing: the bugs hid in all the cracks, and you can't find their nest in any way? And smoke bombs find bugs where even a needle cannot squeeze ...
Fire resistance limit of valves KLOP-1 (60) and KLOP-1 (90)
| In normal open (fire retardant) valve mode: | KLOP-1 (60/90) |
| When the drive is located on the heat side | limit EI60 / 90 |
| When the drive is located on the side opposite to the thermal effect | limit EI60 / 90 |
| When installing the damper in the section of the duct outside the enclosing building structure with a standardized fire resistance limit | limit EI60 / 90 |
| In normal closed valve mode: | KLOP-1 (60/90) |
| Normally closed mode | limit EI60 / 90 |
| In smoke valve mode: | KLOP-1 (60/90) |
| Smoke mode | limit EI60 / 90 |
The smell of bedbugs in the apartment
You can often hear the following phrase: "The apartment smells of bedbugs." It sounds funny, but it's scientifically based.
Both adult bugs and larvae have a special gland that other domestic insects do not have. The gland secretes a special secret that exudes the smell characteristic of bedbugs.
See also our experiments on bedbugs:
We catch bedbugs and test different agents on them - see the results ...
- We test the effect of Hector powder on bedbugs in two versions: simple processing and preparation of traps. See experiment results.
Experiment on bedbugs: at what temperature do they die and how it can be used in practiceWe put the bugs in a container that was treated with the Executioner a week ago - let's see if the parasites are poisoned with the long-dried remedy ...
- We tested Get Express on bedbugs - let's see what came of it ...
Bedbug Experiment: The Executioner Killed Them in 8 Minutes
We check the residual effect of the Executioner on the bugs (how quickly they are etched upon contact with a previously treated, but already dried surface)
- Proven methods for killing bedbugs that have proven to be highly effective
Insect feces, which look like small black dots, have the same smell. Those who have smelled it describe a slight stench, similar to the smell of spoiled cognac or sour raspberries.
Experts know well from experience that such a smell in an apartment is a sign of a large number of bedbugs in the house.
The smell of bedbugs will be felt most strongly near their permanent habitats - in the bed area, behind cabinets, behind window sills, behind picture frames.
Feedback:
“I never believed that the smell of bedbugs in a room could really change. My mother-in-law said that our apartment smelled of bedbugs, but my wife and I thought it was just the smell of old furniture. When we arrived from a two-day fishing trip, they were horrified: there really is a foreign smell, this is not a fiction! They began to carefully revise the furniture and found these vermin behind the sofa. "
Sasha, Kursk
Of course, the smell is almost one hundred percent sign of the presence of bedbugs, but people do not always feel it, because the sense of smell quickly gets used to constant aromas. The greatest likelihood of "sniffing" your own apartment anew is coming from a vacation, from a summer cottage.
If you are not completely sure that the smell really matches the description, you need to pay attention to other signs of bedbugs in the apartment.
Features of installation of a fire-fighting device
Installation of a fire damper has its own nuances. They depend on what type of device is used for protection. If this is an open fire retardant valve, then it is installed regardless of the spatial orientation. True, then it is necessary to check the correctness of the installation and draw up an appropriate act. This work is performed by a representative of the fire inspection.
The installation of open-type fire-prevention dampers does not depend on the direction of the air flow in the ventilation system. The place for their installation is determined in advance, taking into account the general rules of fire safety. An act of conformity of the device to the selected attachment site must be drawn up.
If the valve is of a closed type, then when installing it, the direction in which the combustion products are removed in the event of a fire is taken into account.
Bed bug tracks
Sometimes the previous symptoms of bedbugs in the apartment do not give one hundred percent guarantee, and I want to see the bloodsuckers, as they say, "live". To do this, there is such a way: you need to spread a white sheet on the bed in the evening (on which dark insects will be clearly visible), turn off the light and wait for the onset of 2-3 o'clock in the morning.
After that, the light must be turned on abruptly. If there are bugs in the house, then at least a few of them will definitely be on the bed.
It is also useful to read: Linen bugs and their bites
And more: Lethal methods for destroying bedbugs that really work in practice
When bed bugs bite a person, they, unlike mosquitoes, do not inject an enzyme into the blood that helps it curdle faster. Therefore, immediately after a bug bite, a few drops of blood are released from the wound. Naturally, during sleep, a person turns on the bed and small specks of blood often remain on the sheets.
In order to find them, you need to remove the blanket and carefully examine the sheet in daylight. Drops of blood on bed linen are one of the most accurate signs of bed bugs.
Recommendations for the management of fire protection equipment
The fire dampers are housed in a special housing, on the door of which useful information is displayed for the owner. Thanks to her, you can find out:
- Is there a constant power supply and voltage (50Hz / 220V) in the network?
- Fire door position (OZK closed, OZK open).
- About the "fire" signal.
In fact, the control panel is the most important element of the entire fire protection system. The structural components of the Klop fire-retardant equipment are:
- a body having a rectangular cross-section;
- seals (located between the flaps and the body part);
- protective flaps;
- drive (with its help the sash turns).
The valve is completed with 1 or 2 flaps. They are made of heat-resistant material, which is clad on top with sheets of durable steel. Flaps are installed in the inner part of the body. Their movement in the event of a fire is provided by plain bearings. The device works thanks to a thermal lock or an electric drive. The latter is reliably protected from damage by a removable casing. When voltage is applied to the equipment through the drive, the doors automatically close. If the product has a thermal lock, then its shutter is carried out due to the release of the energy accumulated in the spring. This happens when the exposure temperature reaches 72 ºC.
Traces of the life activity of bedbugs
Bedbugs mark their presence in an apartment not only by smell or bite marks on the human body, but also by other symptoms and signs
- Like other living things, they have a digestion process that ends with the release of undigested food residues.
- Discharge of the bed bug is liquid, dark brown in color. However, in air, they quickly solidify and become hard.
- The bug usually excretes feces shortly after eating. Therefore, you can find the waste products of an insect anywhere, especially there will be a lot of them in the area of the bed and, possibly, on it itself - this is also a sure symptom of bugs hiding somewhere nearby. The feces of bedbugs have a characteristic smell of low-quality cognac.
There is another important sign to identify the population of parasites in an apartment. After hatching from the egg, the bug nymph grows and sheds several times. The insect sheds the upper chitinous cover, which each time becomes more dense and darker.
If the apartment is inhabited by a large number of bedbugs, then you can find such "skins" almost everywhere.
All signs of the presence of bedbugs in the apartment will determine the presence of insects with a high degree of accuracy. However, the most shocking and surest confirmation of the fact that the apartment is infected with insects will be to see the parasites with your own eyes.
At the inception of even the slightest doubt, it is imperative to check all possible habitats of bedbugs. You also need to do this if the neighbors have bugs. It is likely that soon they will begin to settle in neighboring apartments.
Where do bed bugs come from in an apartment and how to deal with them correctly
Profession - exterminator
At first glance, it is not difficult to master the profession of a pest control officer - therefore, having called a specialist to your house, you may well get, for example, a student of the Department of Finance and Credit or a lover of thrash metal. In St. Petersburg, exterminators receive a little more than the average city salary (40 thousand rubles).
Anna: “You can, of course, learn a profession on your own, but this is not serious. In Soviet times, in institutions specializing in disinsection, there were weekly classes, tests, we studied new methods. Now there is nothing like that anywhere. Everyone who needs work goes to exterminators. Ten years ago, it was possible to get a job at the organization where I work only by acquaintance - now exterminators are required everywhere.
Working with chemicals is harmful to health: the liver and bronchi sit down, allergic reactions are not uncommon. Previously, there were additional payments for harm in normal organizations, additional leave, now this is not. "
Photo: The Copacetic Eye
Igor Belov: “Who in St. Petersburg today just does not work as exterminators. After the removal of pest control activities from compulsory licensing, many companies emerged. Most are responsible organizations that comply with sanitary norms and rules in the field of disinsection, receiving methodological materials developed by domestic scientists. But there are also private traders - most often they are people who have worked in companies and have left for free swimming. I cannot comment on the quality of their work, the only thing is that they always charge at a low price. Given that often the sources of insect infestation are found among poor citizens, such soldiers of fortune always find their clients.
People go to exterminators because this is the market: everyone wants to realize themselves with maximum utility. Many people really enjoy working with people, helping to get rid of problems and receiving gratitude. Someone simply cannot find another job and, being in an eternal search, moors to the shores of disinfestation, which, due to its complexity and harmfulness, is paid, albeit insignificantly, but higher than the average for the city. "
Sizes and flow area
Standard size range and flow area, m2 of KLOP-3 wall dampers with BELIMO actuators, depending on the valve installation dimensions
According to individual orders, valves of intermediate sizes (for example, 550x440 mm, 680x570 mm) and valve cassettes for installation dimensions exceeding the table values are manufactured.
Values of coefficients of local resistance
Values of the coefficients of local resistance at the entrance to the smoke exhaust network through the "wall" damper KLOP-3
ζkl - coefficient of local resistance related to the velocity in the flow area of the valve Vkl; Fkl - valve flow area, m2; FВ - the area of the internal section of the duct (shaft), m2.At the end outlet of air through the KLOP-3 damper, the tabular values of ζcl should be multiplied by a factor of 1.35.
Sizes and flow area
Standard size range and flow area, m2, KLOP-3 duct dampers with BELIMO actuators, depending on the dimensions of the inner section of the damper (air duct)
Channel valves KLOP-3 with electromagnetic drive manufactured with dimensions B≥400 mm. Cassettes are also manufactured with dimensions Ak> 1600 mm. When including cassettes in the project, we recommend contacting the company's specialists in order to agree on the design features of these products. Large cassettes are supplied disassembled with the necessary materials and assembly instructions.
