fungineer
Registered User
Our firm does handles a few clients in that use Drive-thru or Quick-serve windows. Typically most of our clients like the "Ready Access" brand for various reasons. However, the specific brand doesn't matter here.
How are you able to find a window that passes the IECC code? For our WI projects, which use 2015 IECC, the Operable fenestrations required a U-factor of 0.43 for our climate zone. Unless I treat the Drive-through as an "entrance" (U max = 0.77) It's really hard to find any suppliers that can meet that u-factor. I know CA requires air curtians, but that's a secondary provision.
Particularly when updating an existing building, where using prescriptive values makes sense (or a balanced method - such as Comcheck), rather than a whole-building analysis this becomes very problematic. Any thoughts, or am I missing something?
How are you able to find a window that passes the IECC code? For our WI projects, which use 2015 IECC, the Operable fenestrations required a U-factor of 0.43 for our climate zone. Unless I treat the Drive-through as an "entrance" (U max = 0.77) It's really hard to find any suppliers that can meet that u-factor. I know CA requires air curtians, but that's a secondary provision.
Particularly when updating an existing building, where using prescriptive values makes sense (or a balanced method - such as Comcheck), rather than a whole-building analysis this becomes very problematic. Any thoughts, or am I missing something?
