RESIDENTIAL | GAS - Ultra Low NOx

1. Ultra High Efficiency (EFR)

ULTRA HIGH EFFICIENCY MODEL
MODEL NUMBERS
EFR-1-60T1206EN
Spec Sheet Parts List Operation Manual Service Manual
123-B 48204-B 238-48144-00E
Supplement 49754-B
Supplement 50320-A
45817-F

2. Eco-Defender Safety System Ultra Low NOx Atmospheric Vent Models (U1)

ECO-DEFENDER SAFETY SYSTEM® ULTRA LOW NOX
ATMOSPHERIC VENT MODELS
MODEL NUMBERS
U1-30S6FRN
U1-40T6FRN
U1-50L6FRN
U1-30T6FRN
U1-404T6FRN
U1-504S6FRN
U1-403S6FRN
U1-5036FRN
U1-60T6FRN
Spec Sheet Parts List Operation Manual Service Manual
112-B 47133-F 238-46789-00F
238-44219-00K
47132A

3. Eco-Defender Safety System Ultra Low NOx Extra Recovery Atmospheric Vent Models (U4)

ECO-DEFENDER SAFETY SYSTEM® ULTRA LOW NOX HIGH EFFICIENCY
ATMOSPHERIC VENT MODELS
MODEL NUMBERS
U4-30T6FRN
U4-403S6FRN
U4-40T6FRN
U4-5036FRN
U4-60T6FRN
Spec Sheet Parts List Operation Manual Service Manual
113-B 47133-F 238-46789-00F
238-46789-00C
238-44219-00K
47132A

4. Eco-Defender Safety System Ultra Low NOx Extra Recovery Atmospheric Vent Models (U1-XR & U2XR)

ECO-DEFENDER SAFETY SYSTEM® ULTRA LOW NOX EXTRA RECOVERY
ATMOSPHERIC VENT MODELS
MODEL NUMBERS
U1-XR-403S6FRN U2-XR-504T6FRN U2-XR-75S6RN
U2-XR-65T6FRN
Spec Sheet Parts List Operation Manual Service Manual
114-B 47133-F
49953-A (75 gallon)
238-46789-00F
238-46789-00C
238-44219-00K
47132A
238-50628-00A (75 gallon)

5. Ultra Low NOx High Input Models (U-1)

ULTRA LOW NOX HIGH INPUT MODELS
MODEL NUMBERS
U-1-75S6RN U-100T6RN
Spec Sheet Parts List Operation Manual Service Manual
140-B 49953-A (75 gallon) 238-47759-00E (75 gallon)
238-47656-00C (100 gallon)
49946-B (100 gallon)
49945-B (75 gallon)
238-49399-00A
238-50628-00A

6. Eco-Defender Safety System Ultra Low NOx TTW1 Power Vent Models (U-1-TW)

ECO-DEFENDER SAFETY SYSTEM® ULTRA LOW NOX TTW®1
POWER VENTED MODELS
MODEL NUMBERS
U-1-TW-40S6FRN U-1-TW-50S6FRN U-1-TW-60T6FRN
Spec Sheet Parts List Operation Manual Service Manual
255-B 48405-D 238-45637-00L
238-48214-00B
Supplement 49754-B
Supplement 50320-A
238-48509-00A

7. Eco-Defender Safety System Ultra Low NOx TTW Power Vent High EF Models (U-4-TW)

energy star ECO-DEFENDER SAFETY SYSTEM® ULTRA LOW NOX TTW®
POWER VENTED HIGH EF MODELS
MODEL NUMBERS
U-4-TW-40T6FRN U-4-TW-50T6FRN U-4-TW-60T6FRN
Spec Sheet Parts List Operation Manual Service Manual
259-B 48405-D 238-45637-00L
238-48214-00B
Supplement 49754-B
Supplement 50320-A
238-48509-00A

8. Eco-Defender Safety System Ultra Low NOx TTW2 Power Vent High Input Models (U-2-TW)

ECO-DEFENDER SAFETY SYSTEM® ULTRA LOW NOX TTW®2
POWER VENTED HIGH INPUT MODELS
MODEL NUMBERS
U-2-TW-50T6FRN U-2-TW-65T6FRN U-2-TW-75T6RN
Spec Sheet Parts List Operation Manual Service Manual
256-B 48405-D
(75 gal) 50565-A
238-45637-00L
238-48214-00B
238-45917-00P (75 gal)
Supplement 49754-B
Supplement 50320-A
Supplement 238-50429-00A (75 gal)
238-48509-00A
238-50629-00A (75gal)

9. Eco-Defender Safety System Ultra Low NOx TTW Power Vent High EF, Extra Recovery Models (U-4-XRTW)

energy star TTW® EXTRA RECOVERY ULTRA LOW NOX
POWER VENT HIGH EF MODELS
MODEL NUMBERS
U-4-XRTW50T6FRN U-4-XRTW65T6FRN
Spec Sheet Parts List Operation Manual Service Manual
261-B 48405-D 238-48933-00C
238-48214-00B
Supplement 49754-B
Supplement 50320-A
Coming Soon

10. Eco-Defender Safety System Ultra Low NOx Power Direct Vent Models (UPDX2)

ULTRA LOW NOX UPDX2
POWER DIRECT VENT MODELS
MODEL NUMBERS
UPDX2-50T6FRN UPDX2-65T6FRN UPDX2-75T6FRN
Spec Sheet Parts List Operation Manual Service Manual
127-B 48626-C 238-47936-00G
238-48838-00C
Supplement 49754-B
Supplement 50320-A
238-49399-00A

11. Eco-Defender Safety System Ultra Low NOx Direct Vent Models (UDS1)

ULTRA LOW NOX DIRECT VENT
MODELS
MODEL NUMBERS
UDS1-40S6FRN UDS1-50S6FRN
Spec Sheet Parts List Operation Manual Service Manual
121-B 48624-A 238-47969-00D
238-48831-00A
238-49640-00A

12. Eco-Defender Safety System Ultra Low NOx High Input Direct Vent Models (UDH1)

ULTRA LOW NOX HIGH INPUT
DIRECT VENT MODELS
MODEL NUMBERS
UDH1-504T6FRN UDH1-65T6FRN UDH1-75S6FRN
Spec Sheet Parts List Operation Manual Service Manual
122-B 48625-A 238-47969-00D
238-48831-00A
238-49640-00A