High Efficiency Non-Condensing 9.8 GPM Residential 199,000 BTU Interior Natural Gas Tankless Water Heater

Model: Rinnai RE199iN (indoor, natural gas) 

Heating Power: 199,000 BTU input, delivering up to 9.8 GPM, ideal for homes with multiple bathrooms 

Efficiency: Non-condensing design with UEF ≈ 0.82; ~34% more efficient than conventional storage tanks 

Activation Flow: Starts at 0.4 GPM (full temperature at ≥140 °F) 

Temperature Range: Adjustable from 98 °F to 140 °F; up to 185 °F with advanced controller accessory 

Dimensions & Weight: Approx. 27.3″H × 14.05″W × 10.8″D, weighing 42 lb

Ventilation: Direct-vent concentric system suitable for retrofits; indoor installation only 

Smart-Ready: Wi-Fi capable with Rinnai Control-R™ module (sold separately) 

Safety Features: Quiet operation (~54 dB), soundproofing, minimum gas/water pressures supported