How does an HVAC system work?
If you are not satisfied with your current heating system or you are going to build yourself a new house or rent an office space, then you probably thought about installing a high-quality ventilation, heating, and air conditioning system. HVAC equipment will come to the rescue in this situation. These devices are used almost everywhere. From private houses to submarines and cars. Such systems will be an excellent option for maintaining the ideal temperature in the room. If you get too hot, you can lower the temperature a little. If it feels that you are cold, then you will have the opportunity to make the temperature warmer. These devices will also provide the necessary humidity at home or in the office, and they will also remove smoke, excess moisture, unpleasant odors and all harmful gases from the room. There are many options for HVAC and to choose the most suitable one, you will have to determine for what specific purposes you will use this equipment. And even better, if you understand how these systems work so that you definitely do not make a mistake with the choice.
HVAC systems are made up of several parts that either heat or cool the air. The movement of the air itself is controlled by fans, which need a power source to operate. Air or water changes its temperature by means of direct contact with heat or various refrigerants. After that, they pass through special channels, exiting through outlets or vents, until they finish their journey throughout the system. Next, the water or air returns to its source in order to reach the required temperature again. A carefully thought-out system of functioning of all HVAC mechanisms allows you to maintain the supply of fresh air in the room, and also controls the presence of various toxic gases.
In general, this equipment consists of:
- Air return systems
- Air ducts
- Branch pipes
- Various electrical items
- Temperature controller
- outdoor unit
Let’s take a look at how the individual processes and elements of an HVAC system work.
- Heating. Heat supply can be direct or forced, depending on the HVAC heating supplies used. The direct system works by means of heat removal directly into the room itself. For this, certain hydraulic or electrical elements are used. For example, radiators or underfloor heating. The forced system heats the air in the furnace itself, after which heating takes place throughout the entire building with the help of fans. Electricity or gas can be used for this. Many forced systems are designed so that they have two sets of air ducts and outlets. This is necessary in order to provide a high level of air return directly to the furnace. One of these sets constantly circulates hot air, while the other has vents in or near the floor that you need to return the settling cold air to the oven. Heat in the system itself can be generated by a special heat exchanger. This device is able to remove heat from the air in cool weather through compression and condensation. The heat exchanger loses its effectiveness if the outside temperature is much lower or higher than the indoor temperature. Therefore, it is commonly used as an additional mechanism in HVAC heating systems.
- Cooling. The main element of the cooling system is the central air conditioner. It usually consists of a compressor and a condenser. The condenser passes the cooled refrigerant through the ventilation ducts in the ventilation system. For this, a special fan is used. It directs the cooled air through the duct directly to the ventilation ducts. The heat exchanger in this system works like an air conditioner, that is, it produces cold air. There are situations when the air duct may not cope with its tasks for certain reasons. In such cases, it is recommended to install special mini-air ducts or an additional ventilation system. Mini duct systems use high-pressure fans to help the refrigerant flow into each required room in order to cool the room. HVAC zoning systems also help in the uniform distribution of air.
- HVAC ventilation works with any ducts that are needed to circulate the air in the house. Most often these are ventilation shafts, ventilation openings in the ceiling, floor or walls, as well as chimneys and air ducts. All these channels must be made so that the system can safely heat or cool the air. Otherwise, hot or cold spots may be created, and there is also the possibility of a problem associated with insufficient removal of warm or cold air. Some ventilation ducts must be connected to an electric or gas oven. The efficiency of space heating largely depends directly on the stove itself and its capabilities. There are also ductless HVAC ventilation systems. They may lack some elements of the usual system.
Now you know a little more about how HVAC heating, cooling, and air conditioning systems work. This will give you the opportunity to more accurately understand what kind of equipment you need and make a choice in favor of the best option from a reliable HVAC distributor. This purchase will make your stay in the room as comfortable and cozy as possible. And this, in turn, will deliver more positive emotions when you are there.