FAQ

• Q1:

  How Do EC Smart Glass and EP (SPD) Smart Glass Differ in Construction?

  

  A:

  EC smart glass uses an electrochromic functional coating integrated with a glass substrate. The functional glass is typically assembled into an insulated glass unit (IGU); it is not made by laminating a separate switchable film between two panes. In some EC glazing designs, the functional glass is positioned toward the exterior and provides solar control as part of the IGU design.

  EP (SPD) smart glass uses a different structure: the SPD film is laminated between glass panes, and the laminated panel is then incorporated into an IGU. In a typical EP IGU configuration, the EP laminated panel is positioned toward the interior, with Low-E glass on the exterior side to support the unit’s thermal performance.

  
  

• Q2:

  Is Photochromic PVB Suitable for Solar Control?

  

  A:

  It can provide adaptive shading by darkening under stronger UV exposure and becoming lighter as exposure decreases. For a project with specific heat-gain requirements, compare tested solar performance for the complete laminated glass or IGU, rather than judging performance by tint alone.

  
  

• Q3:

  Does Photochromic Glass Provide Privacy?

  

  A:

  Darkening can reduce visibility through the glass, but photochromic glass should not automatically be treated as complete privacy glass. Its tint changes with UV exposure and may become lighter when sunlight is weak. If reliable obscured-view privacy is essential, evaluate a dedicated privacy glass solution.

  
  

• Q4:

  Can Photochromic PVB Be Made into an Insulated Glass Unit (IGU)?

  

  A:

  Yes. Photochromic PVB can first be made into laminated photochromic glass. That laminated panel can then be incorporated into an IGU according to the required window construction.

  
  

• Q5:

  Which Is Better for Skylights and Sun-Facing Windows?

  

  A:

  Both can be considered for skylights and windows. EP is appealing when fast tint changes are a priority. EC may suit projects where gradual tint transitions are acceptable. Compare the required glass sizes, clear- and dark-state appearance, controls and tested solar performance.

  
  

• Q6:

  How Do I Choose Between EP and EC Glass?

  

  A:

  Start with three questions: How quickly must the glass respond? What should it look like during a power outage? How much light and solar heat should it admit in each state? Compare product samples and tested data for the complete glazing assembly before making the final selection.

  
  

• Q7:

  How Do I Choose Between DLC and EP for My Project?

  

  A:

  First decide what must happen when the glass is darkest. Choose DLC when the glass needs to obscure the view as well as reduce light. Choose EP when the priority is to adjust tint and daylight. Then compare samples and the on/off VLT and solar performance data for the proposed glazing.

  
  

• Q8:

  Which Film Is Better for Windows and Skylights?

  

  A:

  EP suits windows and skylights where occupants want to adjust glare and daylight throughout the day. DLC suits glazing that also needs a dark opaque privacy state. The best option depends on the required off-state, desired view and glass construction.

  
  

• Q9:

  Which Film Is Better for Solar Shading?

  

  A:

  Both can reduce incoming visible light. EP is a good starting point when the main goal is adjustable shading while retaining a view. DLC is worth considering when dark privacy and shading are both required. For a specific solar heat reduction target, compare tested data for the complete glass assembly.

  
  

• Q10:

  Can Both DLC and EP Film Be Dimmed Gradually?

  

  A:

  Both can offer intermediate light levels with a suitable controller. Their visual effects differ: DLC moves between a dark privacy state and a clearer state, while EP varies the depth of its tint. Confirm the available dimming range for the selected model.

  
  

• Q11:

  When should Low-E IGU smart glass be used?

  

  A:

  For exterior windows, curtain walls, skylights and other building-envelope applications, smart laminated glass can be incorporated into an insulating glass unit with Low-E glass. This combines smart functions with improved thermal insulation and overall glazing performance.