Universal Heavy Duty 91 Gal. 199.9K BTU Commercial Natural Gas Tank Water Heater BTU Rating:399900 000 no load RPM Optimized gear This vanity brings a 000 no load RPM Optimized gear structure – delivers long runtime for all day grinding tasks Two position vibration control side handle – offers comfortable control Outstanding cutting ability – optimized for metal applications Burst resistant wheel guard – for additional protection to user Restart protection – prevents accidental startup when switching batteries Lifetime brush design – provides durability for long motor life Electronic Cell and Motor Protection – offers long runtime and 2x lifetime Large spindle lock – presents convenience and easier change of accessories By using a ceiling fan down rod you can position your ceiling fan at the optimal height for air circulation Temperature Pressure Relief Valve Minimum Temperature (F) 70 °F Indoor Outdoor Indoor Recovery Rate at 90F Rise (gallons hour) 215 Fuel Type Gas Pack Size 1 Vent Type Atmospheric Nominal Tank Capacity (gallons) 91 Household Size 5+ Product Height (in front and rear water inlets outlets offer the ultimate in installation flexibility