| Symbol | Marking according to EN410 | Symbol name | Measure |
|---|---|---|---|
| U vertė | – | Šilumos perdavimo koeficientas / U Value (Thermal transmittance) / |
W/(m2K) |
| SF | (g vertė) | Visuminis saulės energijos laidumas / Total solar energy transmittance (Solar factor) / |
% |
| LT | (Tv) | Šviesos laidumas / Light transmittance / | % |
| LR | (ρv) | Šviesos atspindėjimas / Light reflectance / | |
| EA | (αe) | Saulės energijos absorbcija / Solar direct absorptance / | % |
| ER | (ρe) | Saulės energijos atspindėjimas / Solar direct reflectance / | % |
| ET | (Te) | Saulės energijos laidumas / Solar direct transmittance / | % |
| Tuv | (Tuv) | UV laidumas / Ultraviolet transmittance / | % |
| Ra | (Ra) | Spalvos keitimo indeksas / General colour rendering index / | % |
| ε | (ε) | Emisijos geba / Corrected emissivity / | % |
| Rw | – | Garso izoliacijos rodiklis / Sound insulation index / | dB |
| C | – | Garso izoliacijos rodiklio korekcija garso šaltiniams su nedideliu žemo dažnio tonų kiekiu(dB) / Acoustic adaptation term for pink noise / |
dB |
| Ctr | – | Garso izoliacijos rodiklio korekcija garso šaltiniams su dideliu žemo dažnio tonų kiekiu(dB) / Acoustic adaptation term for traffic noise / |
dB |
C examples: high-speed road transport, high-speed railway transport, small-distance air transport, daily activities, talks, playing children;
Ctr examples: city transport, music at discotheques, low-speed railway transport, air transport at a certain distance.
Optical spectrophotometric qualities
Light transmittance coefficient (LT): ratio between the light entering the room and the falling flow of light.
Light reflection coefficient (LR): ratio between the light reflected outwards and the falling flow of light.
Total solar energy permeability (SF): total amount of the solar energy which enters the room. This is the total amount of the solar energy directly transmitted and absorbed as well as reflected to the interior of premises.