Ruud Residential Gas RUTGH Series Tankless Water Heaters
Ruud® RUTGH Series Super High Efficiency Condensing Tankless Gas Water Heaters
The Ruud RUTGH Series offers Super High Efficiency Condensing Tankless Gas Water Heaters designed for residential use. These models provide on-demand hot water with advanced features for performance and ease of installation.
Product Visual: The image displays a Ruud tankless water heater unit, typically white with the Ruud logo. It features a digital display showing temperature and status indicators. The unit appears compact and modern.
Easy Installation
- PVC Vent runs up to 60' (2" diameter) or 150' (3" diameter).
- Enhanced design is up to 20% smaller and lighter, facilitating one-person installations.
Ready for Retrofits
- Industry-leading 1/2" side-to-side clearance allows for safe service access in tight spaces.
- 1/2" Gas line compatibility extends up to 24 ft (subject to local code).
Key Features
- Ruud® Exclusive! Hot-start Programming™: Ensures the unit is in a ready state between back-to-back usage, minimizing cold water bursts.
- Built-in EcoNet® Wi-Fi technology: Enables direct control from a device (on select models).
- LeakGuard®: An all-inclusive leak detection and prevention system that detects any leak from the unit (on select indoor models with Wi-Fi).
Specifications
| Ruud Model Number | RUTGH-68DVLN-3 | RUTGH-84DVLN-3 | RUTGH-90DVLN-3 | RUTGH-95DVLN-3 RUTGH-95DVELN-3 (Wi-Fi Model) |
|---|---|---|---|---|
| Gas Input Rate MAX | 120,000 BTU/h | 157,000 BTU/h | 180,000 BTU/h | 199,900 BTU/h |
| Gas Input Rate MIN | 11,000 BTU/h | 11,000 BTU/h | 11,000 BTU/h | 11,000 BTU/h |
| Uniform Energy Factor (UEF) | 0.90 | 0.90 | 0.93 | 0.93 |
| Hot Water Flow Rate Capacity MAX (35°F Rise) | 6.6 GPM | 8.4 GPM | 9.0 GPM | 9.5 GPM |
| Hot Water Flow Rate Capacity 45°F Rise | 5.1 GPM | 6.7 GPM | 7.7 GPM | 8.5 GPM |
| Gallons Per Minute (GPM) 67°F Rise | 3.4 GPM | 4.6 GPM | 5.2 GPM | 5.7 GPM |
| Number of Bathrooms¹ | 2.5 | 3 | 3 - 4 | 4 |
| Temp. Range | 100°F - 140°F | |||
| Temp. Setting from Factory | 120°F | |||
| High Temp. Upgrade Available | No | |||
| Freeze Protection | -30°F Air Intake², -4°F Ambient | |||
| Installation Type | Indoor (Outdoor Conversion Kit sold separately: RTGH-X) | |||
| Heat Exchanger Material | Primary: Copper - Secondary: Stainless Steel | |||
| Minimum Activation Flow | 0.4 GPM | |||
| Minimum Continuous Flow | 0.26 GPM | |||
| Maximum Altitude | 7,800 ft. | |||
| Ultra Low NOx | Meets 14 ng/J NOx requirements - SCAQMD Rule 1146.2 compliant | |||
| Warranty | 15 year Heat Exchanger | 5-Year Parts | 1-Year Labor | |||
| Height | 23.7" | |||
| Width | 17.7" | |||
| Depth | 9.8" | |||
| Weight (Lbs.) | 52.9 lbs. | |||
| Venting Diam. Allowed | 2" / 3" | |||
| Max. Single Vent Run (straight pipe) | 60 ft (2") / 150 ft (3") | |||
| Venting Materials | Sched. 40 PVC, CPVC, Polypropylene | |||
| Manifold Controls (max. units)³ | 6 Units | |||
| Controls | Built-in digital display | |||
| Power Supply | 120V 60Hz | |||
| Max. Power Consumption | 85W (Normal use), 0.7 Amps; 132W (Antifreeze), 1.1 Amps; 3.5W (Standby), 0.03 Amps⁴ | |||
| Gas Connection | 3/4" NPT | |||
| Hot Water Connection | 3/4" NPT | |||
| Cold Water Connection | 3/4" NPT | |||
| Condensate Connection | 1/2" NPT | |||
| Vent Connections Diameter | 2" Band Connections (Adapter required to vent with 3" PVC from unit) | |||
All models are available in Natural Gas or Propane (LP). For Propane, replace the 'N' with 'P' in the model number.
Certifications: The unit is certified by NSF, UL, CSA, UPC, and meets Low Lead Content requirements. It is also AHRI Certified.
Pressure Drop Curve: This graph illustrates the relationship between water flow rate (GPM) on the x-axis and pressure drop (PSI) on the y-axis. It shows how much pressure is lost as water flows through the heater at different rates, with a secondary axis showing pressure drop in feet of head.
Performance and Water Temperature Zones
US Ground Water Temperature Zone Map: This map visually divides the United States into nine zones (Zone 1 to Zone 9) based on average ground water temperatures, ranging from 37°F in Zone 1 to 77°F in Zone 9. It includes Alaska (AK), Hawaii (HI), and Puerto Rico (PR). This map is used in conjunction with the Flow Rate Capacity Table to determine model performance based on geographic location.
Average Flow Rates (GPM) by Application
| Application | Average Flow Rate (GPM) |
|---|---|
| Low Flow Faucet | 0.5 |
| Bathroom Faucet | 1 |
| Kitchen Faucet | 1.5 |
| Shower | 2 |
| Dishwasher | 2 |
| Washing Machine | 3 |
Flow rates may vary.
Flow Rate Capacity Table by Zone (Gallons Per Minute - GPM)
Use the U.S. Ground Water Temperature Map to locate your zone. Then use this table to determine model flow rate by zone. Flow rates are calculated for a tankless set temperature of 120°F with a mixed shower temperature of 105°F. Ground water temperatures vary seasonally.
| MODEL # | Ground Water Temperature Zone | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Zone 1 37°F |
Zone 2 42°F |
Zone 3 47°F |
Zone 4 52°F |
Zone 5 57°F |
Zone 6 62°F |
Zone 7 67°F |
Zone 8 72°F |
Zone 9 77°F |
|
| RUTGH-95 | 4.6 | 4.9 | 5.3 | 5.6 | 6.1 | 6.6 | 7.2 | 8.0 | 8.9 |
| RUTGH-90 | 4.2 | 4.4 | 4.7 | 5.1 | 5.5 | 6.0 | 6.5 | 7.2 | 8.0 |
| RUTGH-84 | 3.6 | 3.9 | 4.1 | 4.4 | 4.8 | 5.2 | 5.7 | 6.3 | 7.0 |
| RUTGH-68 | 2.8 | 3.0 | 3.2 | 3.4 | 3.7 | 4.0 | 4.3 | 4.8 | 5.4 |
Venting
Single Unit: Max. Equivalent Vent Lengths - Straight Pipe
| Number of 90° Elbows | Max Length Straight Pipe | |
|---|---|---|
| 2" Pipe | 3" Pipe | |
| 0 | 60 ft. (18.3 m) | 150 ft. (45.7 m) |
| 1 | 54 ft. (16.5 m) | 144 ft. (43.9 m) |
| 2 | 48 ft. (14.6 m) | 138 ft. (42.7 m) |
| 3 | 42 ft. (12.8 m) | 132 ft. (40.2 m) |
| 4 | 36 ft. (11.0 m) | 126 ft. (38.4 m) |
| 5 | 30 ft. (9.1 m) | 120 ft. (36.6 m) |
| 6 | 24 ft. (7.3 m) | 114 ft. (34.7 m) |
Equivalent Ft. of Elbows
| Elbow Type | 2" Pipe | 3" Pipe |
|---|---|---|
| 90° Elbow | 6 ft (1.83 m) | 6 ft (1.83 m) |
| 45° Elbow | 3 ft. (0.9 m) | 3 ft. (0.9 m) |
Venting Materials Allowed: Schedule 40 PVC, CPVC, Polypropylene.
Min. Vent Length Straight Pipe
| Number of 90° Elbows | Min. Length 2" / 3" pipe |
|---|---|
| 1 | 1.0 ft (0.3 m) |
Hanging bracket and bird screens are included with the water heater.
Dimensions
Dimensions Diagram: The diagram provides detailed measurements of the unit. Key views include:
- Top View: Shows the width (17.717 inches) and depth (5.740 inches) from the top perspective, with specific component placements indicated.
- Bottom View: Details the width (5.740 inches) and depth (9.843 inches) from the bottom, showing connection ports.
- Overall Unit Dimensions: Height is approximately 23.7 inches, Width is 17.7 inches, and Depth is 9.8 inches.
Parts & Accessories
- Condensate Neutralizer: RTG20329AR (optional)
- Recirculation Pump: AP17920
- Pipe Cover: RTG20329AT
- Horizontal Vent Termination: 2" US: SP20285, 3" US: SP20286
- Concentric Vent Termination: 2" - SP20897, 3" - SP20245
- AllClear® Water Treatment System: RTG20251
- Isolation Valve Kit: RTG20326
- Manifold Cables: RCPN-AMP03-0013111101-0003 (48")
- Outdoor Conversion Kit: RTGH-X
Clearances
| Location | Required Clearance |
|---|---|
| Top / Bottom | 12" |
| Front | 1/2"⁵ |
| Sides | 1/2" |
| Back / From Vent Pipe | 0" |
⁵ Recommended 24" clearance for service.
Reliable Water Heaters, Tankless Water Heaters, and HVAC Systems - Ruud
