Richmond Essential Plus® RMTG-Series High Efficiency Non-Condensing Tankless Gas Water Heaters
RichmondWaterHeaters.com
Product Overview
The Richmond Essential Plus® RMTG-Series offers high efficiency non-condensing tankless gas water heating for both indoor and outdoor applications. These units provide reliable hot water with advanced features designed for ease of installation and operation.
Key Features
- Easy Installation: Industry leading 43' vent run capability, enhanced design for easier installation and lighter weight for one-person installs.
- Ready for Retrofits: Industry best 1/2" side-to-side clearance for safe working space and 1/2" gas line compatibility up to 24 ft.
- Universal Venting Compatibility: Works with UBBINK, Metal Fab, and Rainbow venting for seamless replacements.
- Richmond® 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: Allows direct control from your device (on select models).
- LeakGuard®: All-inclusive leak detection and prevention system (on indoor Wi-Fi models).
Specifications
The RMTG-Series is available in Natural Gas and Liquid Propane models, with capacities ranging from 11,000 to 199,900 BTU/h.
Indoor & Outdoor Models
| Richmond Model Number | INDOOR | OUTDOOR | ||||
|---|---|---|---|---|---|---|
| RMTG-70DVLN-3 (Wi-Fi Model) | RMTG-70XLN-3 (Wi-Fi Model) | RMTG-84XELN-3 | RMTG-95XELN-3 | RMTG-84DVELN-3 (Wi-Fi Model) | RMTG-95DVELN-3 (Wi-Fi Model) | |
| Built-in LeakGuard™ Model Number | Yes | No | ||||
| Gas Input Rate (BTU/h) MAX | 160,000 | 160,000 | 180,000 | 199,900 | 180,000 | 199,900 |
| Gas Input Rate (BTU/h) MIN | 11,000 | 11,000 | 11,000 | 11,000 | 11,000 | 11,000 |
| Uniform Energy Factor (UEF) | 0.82 | 0.82 | 0.82 | 0.82 | 0.82 | 0.82 |
| Hot Water Flow Rate MAX (35°F Rise) | 7.0 | 8.4 | 9.5 | 7.0 | 8.4 | 9.5 |
| Hot Water Flow Rate MAX (45°F Rise) | 6.0 | 6.7 | 7.4 | 6.0 | 6.7 | 7.4 |
| Gallons Per Minute (GPM) (67°F Rise) | 4.1 | 4.5 | 5.0 | 4.1 | 4.5 | 5.0 |
| Number of Bathrooms¹ | 2-3 | 3 | 3-4 | 2-3 | 3 | 3-4 |
| 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 | |||||
| Heat Exchanger Material | Primary: Copper | |||||
| 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 | 24.2" | 20.75" | 20.75" | 20.75" | 20.75" | 20.75" |
| Width | 13.5" | 13.5" | 13.5" | 13.5" | 13.5" | 13.5" |
| Depth | 10.27" | 9.4" | 9.4" | 9.4" | 9.4" | 9.4" |
| Weight (Lbs.) | 46.5 | 42 | 42 | 42 | 42 | 42 |
| Venting Diam. Allowed | 3" by 5" CONCENTRIC | |||||
| Max. Single Vent Run (straight pipe) | 43 ft. | |||||
| Approved Venting Manufacturer | Metal Fab, Rainbow, UBBINK | |||||
| Manifold Controls (max. units) | 6 Units³ | External Remote (Included) | ||||
| Controls | Built-in digital display | |||||
| Power Supply | 120V 60Hz | |||||
| Max. Power Consumption | 85W (Normal use), 0.7 Amps | |||||
| Gas Connection | 3/4" NPT | |||||
| Hot Water Connection | 3/4" NPT | |||||
| Cold Water Connection | 3/4" NPT | |||||
Clearances
| Top / Bottom | 12" |
| Front | 1/2"⁵ |
| Sides | 1/2" |
| Back / From Vent Pipe | 0" |
A graph shows Pressure Drop (PSI) on the y-axis and Water Flow Rate (GPM) on the x-axis, illustrating a curve that rises as flow rate increases. The curve starts at 0 PSI for 0 GPM and reaches approximately 35 PSI at 6 GPM.
U.S. Ground Water Temperature Zone Map
Use the U.S. Ground Water Temperature Map to locate your zone. Then use the Flow Rate Capacity Table to determine model flow rate by zone. Flow rates calculated for tankless set temperature of 120°F with a mixed shower temperature of 105°F. Ground water temperatures vary seasonally.
A map of the United States is displayed, color-coded to represent different ground water temperature zones (Zone 1: 37°F to Zone 9: 77°F). Alaska, Hawaii, and Puerto Rico are also indicated.
Average Flow Rates (GPM) by Application
| Low Flow Faucet | 0.5 |
| Bathroom Faucet | 1 |
| Kitchen Faucet | 1.5 |
| Shower | 2 |
| Dishwasher | 2 |
| Washing Machine | 3 |
Flow Rate Capacity Table by Zone (Gallons Per Minute - GPM)
| MODEL # | 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 |
|---|---|---|---|---|---|---|---|---|---|
| RMTG-95 | 4.0 | 4.3 | 4.6 | 4.9 | 5.3 | 5.7 | 6.3 | 6.9 | 7.7 |
| RMTG-84 | 3.6 | 3.8 | 4.1 | 4.4 | 4.8 | 5.2 | 5.7 | 6.3 | 7.0 |
| RMTG-70 | 3.2 | 3.4 | 3.7 | 3.9 | 4.2 | 4.6 | 5.0 | 5.6 | 6.2 |
Venting
Single Unit: Max. Equivalent Vent Lengths - Straight Pipe
| Number of 90° Elbows | Max Length 3" / 5" straight pipe | Equivalent Ft. of Elbows (3"/5") |
|---|---|---|
| 0 | 43 ft. (13.1 m) | 90° Elbow: 1.6 ft. 45° Elbow: 9 in. |
| 1 | 41.5 ft. (12.6 m) | |
| 2 | 38.5 ft. (12.2 m) | |
| 3 | 34 ft. (11.7 m) | |
| 4 | 28 ft. (11.3 m) | |
| 5 | 20.5 ft. (10.8 m) | |
| 6 | 11.5 ft. (10.4 m) |
Venting Materials Allowed: 3-in./5-in. (7.6-cm/12.7-cm) UL-approved Category III Stainless Steel vent materials or water heater manufacturer-approved vent material (MetalFab, UBBINK, and Rainbow).
Min. Vent Length Straight Pipe
| Number of 90° Elbows | Min. Length 3"/5" pipe |
|---|---|
| 1 | 1.0 ft (0.3 m) |
A hanging bracket is included with the water heater.
Diagrams show Indoor Direct Vent and Outdoor configurations with top and bottom views, illustrating dimensions and clearances. The Indoor Direct Vent shows a unit with a vertical vent pipe. The Outdoor unit shows a horizontal vent pipe configuration. Dimensions are provided in inches.
Parts & Accessories
- Recirculation Pump: AP17920
- Pipe Cover: RTG20330AJ
- Horizontal Vent Termination Twin Pipe System: RTG20231-2
- Concentric Vent Termination Twin Pipe System: RTG20211
- AllClear® Water Treatment System: RTG20251
- Isolation Valve Kit: RTG20326
- Manifold Cables: RCPN-AMP03-0013111101-0003 (48")
