When designing an indoor ventilation system, many technical issues arise. Various guidelines for design approaches are contained in many methodologies and manuals. Fire safety issues are central to the installation of a ventilation system. It is necessary that the air lock, ventilation, smoke protection are designed in accordance with all the rules.
Find out the cost of heating
Private house ventilation system.
Repair of heating systems
Accommodation and ventilation
Basically, in residential premises, a ventilation system is installed with natural removal and air flow. The inflow is carried out due to open vents and windows, and the installed ventilation grills and valves contribute to the outflow. Exhaust ducts with grilles are installed in the kitchen, bathroom and toilet rooms, that is, where the outflow of air is most necessary to improve its quality. Sometimes it is necessary to install additional household fans.
Air shutter operation diagram.
Any ventilation should be designed taking into account the installation of air locks - vertical sections of the air outlet, changing its direction by 180 °. In the event of smoke or combustion products entering the house, the shutter will ensure that smoke cannot penetrate into other rooms.
Ventilation: natural or mechanical ventilation?
When installing natural ventilation, in order to ensure air movement at a speed of 300 m3 / h, the section of the ventilation duct should be 350 mm in diameter. With mechanical drawing, a channel cross-section with a diameter of 200 mm is established. The choice of ventilation system will depend on the individual layout of the housing under construction. For large enough areas of the house, it is advisable to think about mechanical or combined ventilation.
DESIGN PRESTIGE LLC
How to calculate indoor air exchange
Air exchange is calculated using different methods:
Ventilation device diagram.
In addition, there are certain standards and norms given in specialized documents and GOSTs. The simplest calculation is based on the area of the room. The standards provide for an air supply at the rate of 3 m3 / h per 1 square meter of the room. The number of people in the room does not matter.
Sanitary and hygienic standards assume the provision of air exchange per person in the room, equal to 60 m3 / h.
The multiplicity calculation assumes an indicator of how many times per hour a complete air exchange should take place in the room. For example, in the bedroom, study or dining room - 1 time, in the bathroom and toilet - 25 times. All norms for multiplicities are given in regulatory documents and GOSTs. A more detailed calculation is carried out according to the formula: L = n * V (m3 / h), where n is the normalized rate of air exchange, hour-1, V is the volume of the room, m3.
To calculate the multiplicity, you need:
After the air exchange is calculated, you need to choose the scheme according to which the ventilation system will be laid. The general requirements are imposed on the ventilation system:
The scheme of ventilation in the event of a fire.
DESIGN PRESTIGE LLC
How the device works
An air valve (or several) is installed in the heating system, in places most likely for the accumulation of air bubbles. This prevents the formation of a large congestion, the heating works smoothly.
We recommend that you familiarize yourself with: Overview of fittings for connecting metal-plastic pipes
Mayevsky crane
Such devices were named after the name of their developer. The Mayevsky crane has a thread and dimensions for a pipe with a diameter of 15 mm or 20 mm. It is arranged simply:
- In the body of the valve body, 2 through holes are made, which, in the open position of the Mayevsky crane, are connected to the heating system.
- These holes are sealed with a taper threaded screw.
- Air is discharged through a small (2 mm) opening directed upwards.
In order to bleed air from the system, unscrew the screw 1.5-2 turns. Air blows out with a whistle as communications are under pressure. The end of the airlock outlet is characterized by a drop in pressure and the appearance of water.
Note! The Mayevsky crane is a simple and reliable device for bleeding air accumulations. It does not clog or break because it has no moving parts. Its design is simple and reliable.
On the market, you can find several varieties of the Mayevsky crane, which are the same in design, but differ in the way of adjusting the locking screw. There are:
- with a comfortable handle for unscrewing by hand;
- with a regular head for a flat screwdriver;
- with a square head for a special key.
For an adult, the principle of unscrewing the locking screw does not matter. However, in a home with children, it is safer to use devices that must be unscrewed with a special device. Having unscrewed the usual tap with a comfortable handle, the child can scald with boiling water.
Automatic faucet
The automatic air relief valve is based on the principle of a float chamber, the design includes:
- vertical case with a diameter of 15 mm;
- float inside the body;
- a spring-loaded valve with a cover, which is connected and regulated by a float.
The automatic air valve for the heating system works without human intervention. Normally, when there is no air in the system, the float is pressed against the valve cover by the pressure of the liquid filler. At the same time, the lid is tightly closed.
We recommend that you familiarize yourself with: How to properly solder plastic pipes?
As air accumulates in the valve body, the float goes down. As soon as it drops to the critical level, the spring-loaded valve opens and bleeds out the air. Under the pressure of the carrier in the system, the space is again filled with liquid. The float rises to close the spring valve cover.
When there is no coolant in the communications, the float lies at the bottom of the valve. As the system fills, air leaves the tap in a continuous flow until the coolant reaches the float.
Note! A small amount of air is constantly present under the cover of the automatic valve. This is normal and does not affect work in any way.
A distinction is made between the following configurations of automatic air valves for heating:
- with vertical air discharge;
- with lateral air discharge (through a special jet);
- with bottom connection;
- with corner connection.
For the layman, the design features of an automatic crane do not matter.However, for a professional, there is a difference in choosing between devices.
It's believed that:
- a device with a nozzle and a side hole is more reliable in operation than an automatic valve with a vertical air discharge;
- The bottom-connected valve is more efficient at trapping air bubbles than the side-mounted valve.
If the design of the Mayevsky crane has not undergone changes for many years, then the device of automatic valves is constantly being improved and supplemented.
Manufacturers offer automatic valves with additional devices:
- with a membrane to protect against water hammer;
- with a shut-off valve, for the convenience of dismantling the device during the heating season;
- mini valves.
Note! The disadvantage of an automatic valve is that it gets dirty quickly. Limescale, debris clog the internal, moving parts of the device. This leads to a weakening of the efficiency of its work or complete failure.
Automatic air valves for heating need frequent inspection and cleaning. The undoubted advantages of these devices include the ability to install them in hard-to-reach places.
Fire safety ventilation
To ensure indoor safety, the following requirements must be met:
Fire-fighting measures to prevent the spread of fire through ventilation
To ensure fire safety, you need:
Ventilation: installation materials
When installing ventilation, it is necessary to use fire-retardant and heat-protective non-combustible materials. Typically, sheet steel is used for venting. The thickness of the steel must be 1 mm or more.
Properly installed ventilation will help make your stay in the room more comfortable and safe for your health.
Share a useful article:
Related articles: Featured articles
Air Valve Advantages
The use of ventilation valves offers a number of advantageous benefits, namely:
- Creation of favorable, safe and comfortable conditions for people;
- Increase in the service life of buildings and premises, since the air valve allows you to prevent the appearance of fungus, mold;
- No heat loss;
- Constant supply of fresh air;
- Removal of harmful impurities and gases;
- Convenient control of the entire ventilation and air conditioning system.
Services for the installation of heating water supply
DESIGN PRESTIGE LLC 8 (495) 744-67-74
In addition to fast and high-quality repair of heating pipes, we provide professional installation of turnkey heating systems. On our page by topic heating > resant.ru/otoplenie-doma.html For communication, use the contact phone number of DESIGN PRESTIGE LLC 8(495) 744-67-74, which you can call around the clock. note Our company DESIGN PRESTIGE LLC is a part of the non-profit organization ANO INTERREGIONAL COLLEGE OF JUDICIAL EXPERTS. We also provide services for an independent construction technical expertise. Calculating the cost of heating Heating system repair cost Water supply installation cost Previous post Pipe box: decorative plastic Next post Couplings for polyethylene pipes and connectionHeating from DESIGN PRESTIGE LLC Type: hot water here> /otoplenie-dachi.html
Engineering systems: heating water supply:
