I just had my west facing windows covered with window tinting. It will achieve 3 major improvements to a room. First 98% of the uv light will be blocked-the most critical portion of light that causes fading. Second it will block 50-85% of the infrared wave length( infrared accounts for 50% of light's thermal energy). Third it will improve the accoustic's of the glass which is often a source of reflected sound perceived as bright,and fatiguing. 3-M is a good brand but there is a German brand Huber that is the best if you want your window protected but no tinting. This brand is used by museums that want maximum light but blockade of the uv and infared. It uses 3 layers of plastic each tuned to a different wavelength. It has no metallic sheen to it like 3-M. It is the best.
David Pritchard
David Pritchard