STANDARD FEATURES
- ⅞” Insulated glass unit
- Burglar resistant anti-drift latch at top sash
- Tilt in sash for cleaning
- Slim sight line
- Integral extruded pull up & pull down handles
- Spiral balances calibrated for sash weight
- Mates with the 3050 Series fixed
- Male / Female Impost for composite units
- Fiberglass Mesh Screen
OPTIONAL FEATURES
- Metal tilt latch
- Class 5 Balances
- Snap latch at bottom rail
- Flange (1 ½”, 2”)
- Head expander
AVAILABLE ACCESSORIES
- Receptor system
- Panning
- Trim
| MODEL | AAMA rating | STRUCTURAL LOAD (psf) | TEST SIZE | WIND SPEED | AIR (cfm/ft²) | WATER (psf) | U-VALUE¹ |
|---|---|---|---|---|---|---|---|
| 2501 | C-50 / 60 | 75 / 90 | 56" x 91” | 25 (1.6 psf) | <0.2 | 7.5 / 9 | 0.36 - 0.45 |
* Down-sized testing
Performance data based on testing by AAMA Accredited Laboratory and NFRC Simulation software/or independent testing. Actual results will vary based on field conditions, locations, size/configurations or glazing options. Be sure to verify the performance requirements for your particular project. 1 U-Values will vary depending on the glazing selected. Please contact Northern for more information.
2500 Series
STANDARD FEATURES
- ⅞” Insulated glass unit
- Burglar resistant anti-drift latch at top sash
- Tilt in sash for cleaning
- Slim sight line
- Integral extruded pull up & pull down handles
- Spiral balances calibrated for sash weight
- Mates with the 3050 Series fixed
- Male / Female Impost for composite units
- Fiberglass Mesh Screen
OPTIONAL FEATURES
- Metal tilt latch
- Class 5 Balances
- Snap latch at bottom rail
- Flange (1 ½”, 2”)
- Head expander
AVAILABLE ACCESSORIES
- Receptor system
- Panning
- Trim
| MODEL | AAMA rating | STRUCTURAL LOAD (psf) | TEST SIZE | WIND SPEED | AIR (cfm/ft²) | WATER (psf) | U-VALUE¹ |
|---|---|---|---|---|---|---|---|
| 2501 | C-50 / 60 | 75 / 90 | 56" x 91” | 25 (1.6 psf) | <0.2 | 7.5 / 9 | 0.36 - 0.45 |
* Down-sized testing
Performance data based on testing by AAMA Accredited Laboratory and NFRC Simulation software/or independent testing. Actual results will vary based on field conditions, locations, size/configurations or glazing options. Be sure to verify the performance requirements for your particular project. 1 U-Values will vary depending on the glazing selected. Please contact Northern for more information.