What is the window indicated for a house in town?

In this case the first aspect to consider is the right matching with the architectural style of the building, but it's very important to keep under control the aggressions of the environmental factors such as smog and pollution. 

For these reasons, it's better to prefer plain frames and esences like Meranti and Hemlock, which facilitate the maintenance.

What window have I to choose if I want to protect my house from smog and noises?

In the last years the use of on external cladding in Aluminium has grown very much. This because they increase the thermal and acoustic performances of the home and make cleaning and maintenance easier.

In the country, which window is best?

In these kind of environments the choice must primarily fall on essences like Pine or Oak with Mordenzato finishing.

Also the windowpanes can be stylized in antique or rural shapes with horizontal fillets (toscano) or cross grids.

What's the best for commercial and directional buildings?

Wood windows with Alumnium cladding are the optimum solution.

Many problems linked to condensation and creation of cold areas, tipical of buildings haunted only during the day, have been successfully solved thanks to this kind of systems.

Moreover, these windows have a great flexibility in design and are very easy to maintain.