Thermal requirements for the facade define a set of parameters that determine the energy performance of a building. 
Apart from those related to the heat transfer coefficient for facades and windows, the issues related to total solar energy transmittance should not be forgotten.
MAS Design specialists are able to help in the selection of solutions, their analysis and assess their impact on the functioning of the building. 
We know that one window is not going to change the world, but a passive window with an integrated ventilation system that can be connected to the BMS system can change a lot. We know the existing hardware by heart.