| FL7903 | Kawneer Company | WindowsSingle Hung | ReadyFL7903-R7: Approved | No |
| FL7912 | Kawneer Company | WindowsDouble Hung | ReadyFL7912-R7: Approved | No |
| FL7913 | Kawneer Company | WindowsHorizontal Slider | ReadyFL7913-R7: Approved | No |
| FL11568 | Kawneer Company | WindowsProjected | ReadyFL11568-R6: Approved | Yes |
| FL15115 | Kawneer Company | WindowsHorizontal Slider | ReadyFL15115-R6: Approved | Yes |
| FL16005 | Kawneer Company | WindowsSingle Hung | ReadyFL16005-R5: Approved | Yes |
| FL16032 | Kawneer Company | WindowsSingle Hung | ReadyFL16032-R5: Approved | No |
| FL16792 | Kawneer Company | WindowsFixed | ReadyFL16792-R5: Approved | Yes |
| FL16793 | Kawneer Company | WindowsProjected | ReadyFL16793-R5: Approved | Yes |
| FL16794 | Kawneer Company | WindowsCasement | ReadyFL16794-R5: Approved | Yes |
| FL19311 | Kawneer Company | WindowsFixed | ReadyFL19311-R4: Approved | No |
| FL20500 | Kawneer Company | WindowsCasement | ReadyFL20500-R4: Approved | Yes |
| FL20501 | Kawneer Company | WindowsProjected | ReadyFL20501-R5: Approved | Yes |
| FL41749 | Kawneer Company | WindowsFixed | ReadyFL41749-R2: Approved | Yes |
| FL44172 | Kawneer Company | WindowsFixed | ReadyFL44172-R1: Approved | Yes |
| FL44175 | Kawneer Company | WindowsProjected | ReadyFL44175-R1: Approved | Yes |
| FL14477 | Kolbe & Kolbe Millwork Co., Inc. | WindowsDouble Hung | ReadyFL14477-R9: Approved | Yes |
| FL14602 | Kolbe & Kolbe Millwork Co., Inc. | WindowsFixed | ReadyFL14602-R7: Approved | Yes |
| FL14782 | Kolbe & Kolbe Millwork Co., Inc. | WindowsFixed | ReadyFL14782-R8: Approved | Yes |
| FL15188 | Kolbe & Kolbe Millwork Co., Inc. | WindowsAwning | ReadyFL15188-R12: Approved | Yes |
| FL15189 | Kolbe & Kolbe Millwork Co., Inc. | WindowsFixed | ReadyFL15189-R10: Approved | Yes |
| FL15190 | Kolbe & Kolbe Millwork Co., Inc. | WindowsCasement | ReadyFL15190-R11: Approved | Yes |
| FL16519 | Kolbe & Kolbe Millwork Co., Inc. | WindowsFixed | ReadyFL16519-R7: Approved | Yes |
| FL21993 | Kolbe & Kolbe Millwork Co., Inc. | WindowsFixed | ReadyFL21993-R6: Approved | Yes |
| FL21044 | Kolbe Windows and Doors - Manawa | WindowsMullions | ReadyFL21044-R8: Approved | Yes |
| FL22235 | Kolbe Windows and Doors - Manawa | WindowsCasement | ReadyFL22235-R8: Approved | No |
| FL22241 | Kolbe Windows and Doors - Manawa | WindowsAwning | ReadyFL22241-R10: Approved | No |
| FL22242 | Kolbe Windows and Doors - Manawa | WindowsFixed | ReadyFL22242-R17: Approved | No |
| FL22655 | Kolbe Windows and Doors - Manawa | WindowsDouble Hung | ReadyFL22655-R10: Approved | No |
| FL22656 | Kolbe Windows and Doors - Manawa | WindowsHorizontal Slider | ReadyFL22656-R7: Approved | No |
| FL48384 | Kommerling USA Inc. | WindowsDual Action | ReadyFL48384: Approved | No |
| FL12398 | Krestmark Industries | WindowsSingle Hung | ReadyFL12398-R15: Approved | No |
| FL13195 | Krestmark Industries | WindowsFixed | ReadyFL13195-R9: Approved | No |
| FL13418 | Krestmark Industries | WindowsHorizontal Slider | ReadyFL13418-R8: Approved | No |
| FL17148 | Krestmark Industries | WindowsFixed | ReadyFL17148-R7: Approved | No |
| FL17660 | Krestmark Industries | WindowsSingle Hung | ReadyFL17660-R6: Approved | No |
| FL43938 | Krestmark Industries | WindowsHorizontal Slider | ReadyFL43938-R2: Approved | No |
| FL47901 | La Cantina Doors, Inc. | WindowsFixed | ReadyFL47901-R1: Approved | Yes |
| FL15898 | Lag Design of Florida | WindowsFixed | ReadyFL15898-R5: Approved | Yes |
| FL47035 | Lindsay Windows, LLC | WindowsFixed | ReadyFL47035-R2: Approved | No |
| FL47036 | Lindsay Windows, LLC | WindowsSingle Hung | ReadyFL47036-R2: Approved | No |
| FL14370 | Loewen Windows | WindowsFixed | ReadyFL14370-R8: Approved | Yes |
| FL14386 | Loewen Windows | WindowsFixed | ReadyFL14386-R9: Approved | No |
| FL14603 | Loewen Windows | WindowsMullions | ReadyFL14603-R7: Approved | No |
| FL14692 | Loewen Windows | WindowsDouble Hung | ReadyFL14692-R9: Approved | Yes |
| FL14693 | Loewen Windows | WindowsSingle Hung | ReadyFL14693-R9: Approved | Yes |
| FL14694 | Loewen Windows | WindowsFixed | ReadyFL14694-R8: Approved | Yes |
| FL14695 | Loewen Windows | WindowsFixed | ReadyFL14695-R7: Approved | Yes |
| FL15302 | Loewen Windows | WindowsAwning | ReadyFL15302-R8: Approved | No |
| FL15303 | Loewen Windows | WindowsCasement | ReadyFL15303-R7: Approved | No |