Rinnai V53DeN Outdoor Natural Gas Tankless Water Heater
Rinnai V53DeN Outdoor Natural Gas Tankless Water Heater Review
The Rinnai V53DeN is a 130,000 BTU outdoor natural gas tankless water heater. The "V53" identifies the Value Series 5.3 GPM rated capacity; "DeN" means direct-vent exterior natural gas configuration.
Specs: 130,000 BTU natural gas input, UEF 0.82 (non-condensing), 5.3 GPM at a 35°F rise. Sealed direct-vent combustion (outdoor mount eliminates indoor venting). 12-year warranty on heat exchanger.
The exterior natural gas configuration is common in warm-climate markets (California, Arizona, Texas, Florida) where outdoor install is code-acceptable. Eliminates indoor venting cost ($500-$1,500 savings) and frees indoor space.
The 130K BTU class is sized for 1-bath warm-climate homes or small 2-bath homes with sequential demand. About $1,200 unit, $2,500 installed.
Right buyer: warm-climate 1-2 bath primary residence with suitable exterior wall mount location, particularly retrofit replacements where eliminating indoor venting saves significant install cost.
- Outdoor mounting — eliminates indoor venting cost ($500–1,500 savings) and frees mechanical room space
- 10-year warranty — solid above-average coverage for this class
- Requires dedicated 120K BTU gas supply line — undersized gas piping is the leading cause of flow-rate shortfalls