The Rheem G76-200 is a 76-gallon natural gas commercial water heater from Rheem's Universal Heavy Duty series, engineered with a narrow jacket diameter and short floor-to-vent height specifically to fit into tight commercial retrofit spaces where a replacement unit must slot into an existing mechanical room footprint. Top, front, and rear water inlet/outlet connections give installers flexibility to match whatever plumbing configuration the space already has, and a factory-installed AGA/ASME-rated temperature and pressure relief valve, full-port full-flow brass drain valve, and low-profile automatic flue damper come standard.
Motels, hotels, gyms, schools, restaurants, and general businesses rely on the G76-200 wherever natural gas service is available and hot water demand exceeds what a residential-class unit can sustain. Rheem's patented multi-flue heat exchanger design, combined with a proprietary steel formulation and two coats of porcelain enamel, is built for durability under continuous commercial recovery cycling, while precision high-chromium stainless steel burners slide out drawer-style for quick inspection and maintenance without removing the whole burner assembly. The System Sentinel LED diagnostic system verifies the unit's operating sequence step by step, giving service technicians a fast, visual way to isolate a fault.
Common configuration: 76-gallon tank capacity, 199,900 BTU/hour input (199,000 BTU/hr per some documentation), natural gas fuel (LP propane variant also available as G76-200 LP), direct spark-to-pilot ignition, 80% thermal efficiency, recovery rate of approximately 215 GPH at a 90°F rise (up to ~485 GPH at lower temperature rise per some specification sheets), 6" draft hood/vent outlet size, 150 psi maximum working pressure, 1-1/2" x 1-1/2" top water connections plus 1-1/2" front/rear connections, 3/4" gas connection, porcelain-enameled steel tank construction with fiberglass insulation, patented anode rod, bolted hand hole cleanout, and a maximum temperature setting of 180°F. Tank dimensions are approximately 26-1/4" diameter x 64" height (68-13/16" to 68.81" including the draft hood), with a 3-year limited tank warranty and 1-year parts warranty, standby loss of roughly 1,208.8 BTU/hour, and 0.3A draw at 120VAC.
Quick-Reference Spec Glossary
- Tank capacity
- 76 gallons
- BTU input
- 199,900 BTU/hour
- Fuel type
- Natural gas — LP propane variant (G76-200 LP) also available
- Recovery rate
- ~215 GPH at 90°F rise; up to ~485 GPH at lower temperature rise
- Thermal efficiency
- 80%
- Ignition system
- Direct spark-to-pilot
- Tank dimensions
- 26-1/4" diameter x 64" height (68-13/16" including draft hood)
- Max working pressure / max temp
- 150 psi / 180°F