Terms and abbreviations used in the field of heating, ventilation, and air conditioning.
BGS – domestic hot water;
Fossil fuels – a natural product from which, during refining, the fuels commonly used today are obtained – natural gas, diesel (and its derivatives), and coal.
Energy class – classification of products according to their energy efficiency. Class A is the most efficient, while Class G is the least efficient. The COP factor is used to determine the efficiency class.
COP – coefficient of performance of a device in heating mode. A COP of 3 means that for 1 kWh of electrical energy consumed, the device produces 3 kWh of thermal energy to heat the air in a room.
EER – efficiency coefficient in cooling mode. If the EER is 3, this means that for 1 kWh of electrical power consumed, the device produces 3 kWh of energy for cooling the environment.
Drying – Atmospheric air, at any temperature, contains some amount of "water". Drying is a thermodynamic process through which the amount of water in the air is reduced.
Counterflow regenerative heat exchanger – creates heat exchange between two air streams passing through it via a series of plates, usually made of aluminum. The two air streams move perpendicular to each other and are driven by fan sections with high static pressure.
Partial air recirculation – through this process, part of the air extracted from the room is expelled and replaced with fresh air, due to hygiene requirements.
Full air recirculation – in this process, the air extracted from the room passes through the ventilation chamber, is filtered, and is returned back to the room.
Static pressure – this is the pressure required by a fan or pump to overcome the pressure drop in the system. It is measured in Pa or kPa.
Building Management system (BMS) - a centralized control system connecting controllers and sensors in a network, which can be managed from a single location.
