You mentioned the sweet spot of glass space in the video. I'm curious to your sources or evidence that the 1" unit fairs better than the 7/8" unit. I have always heard Argon's sweet spot is 1/2" space (3/4 overall dual pane) and Krypton's sweet spot is 1/4" (7/8-1" overall triple pane.) I believe that was a study done by Cardinal a few years ago. Your thoughts on that?
The sweet spots you mentioned for insulating property of Argon and Krypton are correct. Each pane of glass is about 1/8". That is why double pane windows are typically 3/4" to 7/8" and filled with Argon. Triple pane windows need to be filled with krypton if you want an optimally performing triple that is sub 1" overall thickness IGU. If it is to be filled with argon then a triple should be closer to 1-3/8" to be optimal. Argon is less expensive than krypton as long as you don't mind the thicker IGU. It is common for window manufacturers to make sub-optimal IGUs just because they don't have a frame that can accommodate the size of a thermodynamically optimal IGU.
Nope, the 1" dual will not outperform the 7/8" dual IGU's since IGU performance begins to decline at about 13/16". The optimal thickness for a dual pane IGU is 7/16" to 1/2" (slight variations depending on coating). Starting as low as 5/8" width space (depending on glass thickness and coating used), IG performance will begin to degrade, primarily due to convection currents within the airspace. Argon or krypton do offer a noticeable improvement over air in the space because they affect the convection currents. If you want to split hairs, glass thickness can have a greater effect on glass performance numbers than a small difference in airspace width, all else being equal. Triple pane does not generically block 40% more sound than does dual pane, curious where you arrived at that number since you use it all the time. In fact the 1" dual pane in your example should have better sound performance than the narrow triple that you compared it with, again all else being equal. The biggest potential advantage of a triple over a dual in sound performance is the width of the airspace. If the combined airspace width of the triple isn't greater than the airspace width of the dual (glass thickness being the same in both - 2 lites @ 1/8" in dual and 3 lites @1/8" in the triple), then sound performance will be pretty much equal. But if the dual has a 1/2" space and triple has two 1/2" airspaces, then the triple will have better performance. LowE coatings and argon and krypton gas infill have no effect on sound performance.
Fantastic info. You are doing good work.
You mentioned the sweet spot of glass space in the video. I'm curious to your sources or evidence that the 1" unit fairs better than the 7/8" unit. I have always heard Argon's sweet spot is 1/2" space (3/4 overall dual pane) and Krypton's sweet spot is 1/4" (7/8-1" overall triple pane.) I believe that was a study done by Cardinal a few years ago.
Your thoughts on that?
The sweet spots you mentioned for insulating property of Argon and Krypton are correct. Each pane of glass is about 1/8". That is why double pane windows are typically 3/4" to 7/8" and filled with Argon. Triple pane windows need to be filled with krypton if you want an optimally performing triple that is sub 1" overall thickness IGU. If it is to be filled with argon then a triple should be closer to 1-3/8" to be optimal. Argon is less expensive than krypton as long as you don't mind the thicker IGU. It is common for window manufacturers to make sub-optimal IGUs just because they don't have a frame that can accommodate the size of a thermodynamically optimal IGU.
Nope, the 1" dual will not outperform the 7/8" dual IGU's since IGU performance begins to decline at about 13/16".
The optimal thickness for a dual pane IGU is 7/16" to 1/2" (slight variations depending on coating). Starting as low as 5/8" width space (depending on glass thickness and coating used), IG performance will begin to degrade, primarily due to convection currents within the airspace. Argon or krypton do offer a noticeable improvement over air in the space because they affect the convection currents. If you want to split hairs, glass thickness can have a greater effect on glass performance numbers than a small difference in airspace width, all else being equal.
Triple pane does not generically block 40% more sound than does dual pane, curious where you arrived at that number since you use it all the time. In fact the 1" dual pane in your example should have better sound performance than the narrow triple that you compared it with, again all else being equal.
The biggest potential advantage of a triple over a dual in sound performance is the width of the airspace. If the combined airspace width of the triple isn't greater than the airspace width of the dual (glass thickness being the same in both - 2 lites @ 1/8" in dual and 3 lites @1/8" in the triple), then sound performance will be pretty much equal. But if the dual has a 1/2" space and triple has two 1/2" airspaces, then the triple will have better performance.
LowE coatings and argon and krypton gas infill have no effect on sound performance.