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Rinnai RU90 - 5.8 GPM at 60° F Rise - 0.96 EF - Gas Tankless Water Heater - Outdoor

Rinnai RU90 - 5.8 GPM at 60° F Rise - 0.96 EF - Gas Tankless Water Heater - Outdoor
Model: RU90EN
$1,329.00
In-Stock
Ships Monday, Aug 20th
Free Shipping
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
 
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In-Stock
Ships Monday, Aug 20th
Free Shipping
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  • Product Description
  • 7
    Reviews
  • 1
    Product Q&A
  • Recommended Accessories
  • How-To Articles
  • Manuals
Product Description
+
Fuel
Natural Gas
Location
Outdoor
# of Showers
2.8
Energy Factor
Fuel
Natural Gas
Location
Outdoor
#of Showers
2.8
Energy Factor
0.96
Energy Star Rated
Yes
Features
Features
    Rinnai has been delivering nothing but the best for almost 100 years and that award-winning dedication can't help but be noticed in its SE+ Series. The RU90eN and all of the SE+ Series models offer Rinnai's incredibly efficient condensing design line of tankless heaters. Rinnai's SE+ Series models utilize two premium heat exchangers to provide optimal reliability and durability. With a 0.96 Energy Factor and a sleek, innovative design, the RU98eN is the ultimate option, and is easily maintained thanks to included isolation valves.
  • Compact design saves space.
  • The RU90eN is designed to be able to be installed inconspicuously on any exterior wall or compact space, hiding your unit and freeing up valuable space in your home. Rinnai tankless water heaters are perfect for any home.
  • Energy-efficient promise that saves you money.
  • Tankless water heaters avoid the need to keep a large amount of reserve water heated at all times. This saves energy by only heating water when you need it, while an entirely electric ignition avoids the constantly wasted energy of a standing pilot light.
  • Continuous Water for Multiple Applications
  • Rinnai tankless water heaters provide an endless supply of hot water that remains uninterrupted, even when you're the last one in line for the shower.
  • Product Includes
  • (1) Cold Isolation Valve (Color coded: Blue)
  • (1) Hot Isolation Valve (Color coded: Red)
  • (1) Pressure Relief Valve
  • (1) MC-91-2 temperature controller
  • (2) Self Tapping Screws
Specifications
General Information
Type
Tankless Water Heater
Product Line
Super High Efficiency Plus (SE+)
Product Sub-line
RU
Medium Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Condensing
Vent Type Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
Gas Conversion Kit
Not Available
UPC
766156008269
Performance
Flow Rate at 40F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
8.6 GPM
Flow Rate at 45F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7 GPM
Flow Rate at 50F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.9 GPM
Flow Rate at 60F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.8 GPM
Flow Rate at 70F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.0 GPM
Maximum Input Capacity The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
180000 BTU
Minimum Input Capacity
15200 BTU
Energy Factor Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.96
Minimum Flow Rate
0.4 GPM
Ultra Low NOx Emissions NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Product Height
25.7 Inches
Product Width
18.5 Inches
Product Depth
10 Inches
Product Weight
70.5 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
NSF Listed
Yes
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
12 Years
Fuel
Natural Gas
Location
Outdoor
# of Showers
2.8
Energy Factor
Fuel
Natural Gas
Location
Outdoor
#of Showers
2.8
Energy Factor
0.96
Energy Star Rated
Yes
Features
Features
    Rinnai has been delivering nothing but the best for almost 100 years and that award-winning dedication can't help but be noticed in its SE+ Series. The RU90eN and all of the SE+ Series models offer Rinnai's incredibly efficient condensing design line of tankless heaters. Rinnai's SE+ Series models utilize two premium heat exchangers to provide optimal reliability and durability. With a 0.96 Energy Factor and a sleek, innovative design, the RU98eN is the ultimate option, and is easily maintained thanks to included isolation valves.
  • Compact design saves space.
  • The RU90eN is designed to be able to be installed inconspicuously on any exterior wall or compact space, hiding your unit and freeing up valuable space in your home. Rinnai tankless water heaters are perfect for any home.
  • Energy-efficient promise that saves you money.
  • Tankless water heaters avoid the need to keep a large amount of reserve water heated at all times. This saves energy by only heating water when you need it, while an entirely electric ignition avoids the constantly wasted energy of a standing pilot light.
  • Continuous Water for Multiple Applications
  • Rinnai tankless water heaters provide an endless supply of hot water that remains uninterrupted, even when you're the last one in line for the shower.
  • Product Includes
  • (1) Cold Isolation Valve (Color coded: Blue)
  • (1) Hot Isolation Valve (Color coded: Red)
  • (1) Pressure Relief Valve
  • (1) MC-91-2 temperature controller
  • (2) Self Tapping Screws
Specifications
General Information
Type
Tankless Water Heater
Product Line
Super High Efficiency Plus (SE+)
Product Sub-line
RU
Medium Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Condensing
Vent Type Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
Gas Conversion Kit
Not Available
UPC
766156008269
Performance
Flow Rate at 40F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
8.6 GPM
Flow Rate at 45F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7 GPM
Flow Rate at 50F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.9 GPM
Flow Rate at 60F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.8 GPM
Flow Rate at 70F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.0 GPM
Maximum Input Capacity The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
180000 BTU
Minimum Input Capacity
15200 BTU
Energy Factor Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.96
Minimum Flow Rate
0.4 GPM
Ultra Low NOx Emissions NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Product Height
25.7 Inches
Product Width
18.5 Inches
Product Depth
10 Inches
Product Weight
70.5 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
NSF Listed
Yes
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
12 Years
Product Specs
+
Specifications
General Information
Type
Tankless Water Heater
Product Line
Super High Efficiency Plus (SE+)
Product Sub-line
RU
Medium Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Fuel Type To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Condensing
Vent Type Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
Gas Conversion Kit
Not Available
UPC
766156008269
Performance
Flow Rate at 40F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
8.6 GPM
Flow Rate at 45F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7 GPM
Flow Rate at 50F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.9 GPM
Flow Rate at 60F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.8 GPM
Flow Rate at 70F Temperature Rise Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.0 GPM
Maximum Input Capacity The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
180000 BTU
Minimum Input Capacity
15200 BTU
Energy Factor Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.96
Minimum Flow Rate
0.4 GPM
Ultra Low NOx Emissions NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
0.75 Inches
Cold Water Inlet
0.75 Inches
Hot Water Outlet
0.75 Inches
Product Height
25.7 Inches
Product Width
18.5 Inches
Product Depth
10 Inches
Product Weight
70.5 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
NSF Listed
Yes
Warranty Information
Parts Warranty A warranty is a safeguard from defects in manufacturing and can vary in length and terms. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
12 Years
Reviews
(7)
+
Rinnai RU90EN Reviews & Ratings
Product Q&A
(1)
+
Search Product Q&A's Answered by Bob, the Heating Product Expert
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+
How much demand can a Rinnai tankless water heater handle? Can you use the shower and dishwasher at the same time?
Dennis 
from North Carolina 
October 21, 2015
Answer
Sizing a tankless water heater involves a few easy steps. You can use the map on our Tankless Water Heater Buying Guide to determine your incoming water temperature (it's really easy). Based on that, you'd determine the flow rate you'll get from any tankless water heater in the specifications PDF.

For example, in Chicago we have 47 degree ground water, meaning I would want a 73 degree temperature rise. The Rinnai RUR98IP (spec sheet) will produce about 5.5 GPM at that temperature rise - more than enough to run a standard shower head and a dishwasher at the same time. Standard fixture GPM requirements can be found in the tankless water heater buying guide linked above.

Thanks for your question!
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