Convection is a way of transferring heat through fluids and gases. It appears by mixing hot and cold parts.
Radiation is a way of transferring the absorbed heat from one body to another when they are not in contact.
Absorption is the amount of heat that one body can keep in itself as a result of the emissivity of the body.
Reflection is the heat that a body rejects from itself, because of its reflexivity.
Transmission is the energy passing through a body.
Conductivity is the ability of a body to keep heat inside. The greater the conductivity of a body, the greater the ability to conserve energy. The less conductivity is the heat moves faster through the body.
Energy Class is the classification of facilities according to the average heating and cooling energy demand, per 1m2/yearly. According to this classification division by classes is: A ++ (0kW / m2a); A + (≤15kW / m2a); A (≤25kW / m2a); B (≤50kW / m2a); C (≤100kW / m2a); D (≤150kW / m2a); E (≤200kW / m2a); F (≤250kW / m2a); G (≤300kW / m2a).
Energy Efficient Building is a criterion by which each country imposes a standard according to which buildings must be built. This criterion is defined according to the Energy Class of the object. Most widespread standard is that a building can be defined as energy efficient with an efficiency class C (≤100kW / m2a), or higher. High Energy Efficient Building is one with energy class B (≤50kW / m2a), or higher.
Passive House is not a house, or some building, but an expression that defines the level of energy standard of the facility. It is the highest economically cost effective standard of energy efficiency in the world, marked with class A + (≤15kW / m2a). Objects with this energy standard dominantly use passive (free) energy sources for heating and cooling, and so they got their name. Active energy necessary to heat these buildings shall not exceed 15 kW / (m2 per year).
EnerPHit Standard is an energy standard for old buildings that are adapted to the Passive House standard. In order to reduce the cost of the adaptation, the old adaptable facilities will receive this standard if the average need for heating and cooling energy does not exceed 25kW / m2 per year.
Zero House is also not a house or facility, but a standard for energy efficiency class A ++. According to this standard, no additional energy is needed for heating and cooling of the facility. So far, several experimental objects have been built with this standard, but it is still economically unprofitable and therefore has not any wider application yet.
A thermalbridge is a "weak" or generally uninsulated place on the shell of the building, although a layer of insulation is laid.
Air Leakage is an expression for air penetration through the shell of the building, through which it comes to mixing outside and inside air and losing energy by convection.
Thermal Camera, or IR Camera is a camera that registers the amount of infrared radiation from bodies and thus calculates the temperature.