(800)865-5931 Mon-Fri 7am-7pm, Sat 9am-2pm CT
EST. 2002
Home Air Products™
My Location: Ashburn, VA [Change]
Free Shipping See Details
No Sales Tax See Details
Enter your zip for personalized product and service recommendations.
The Rinnai RU80iN has been discontinued
Rinnai RLi Series 09
Rinnai RL94iN

Interior, 9.4 GPM, Natural Gas, 83% Efficiency Tankless Water Heater

 Available in four models, suitable for mid- to large-sized homes, Rinnai’s new Ultra Series Condensing Tankless Water Heaters offer all the same benefits builders and homeowners have come to expect from Rinnai. Never run out of hot water again, and enjoy the space savings, convenience, ease of installation and peace of mind for which Rinnai is famous. 

 Rinnai’s unique condensing design incorporates two innovative heat exchangers to achieve optimum heating value from every cubic foot of natural gas or propane. The stainless steel system recaptures residual heat from flue gases to pre-heat incoming ground water, which then circulates to the primary copper heat exchanger.

Delivering an Energy Factor (EF) up to .96, Rinnai’s tankless condensing units are ideal for residential and commercial applications and can be banked for even greater capacity

RU Series interior-mount units can be placed in any room, vent directly to the outside and have an integrated condensate collector.  All RU units contain a newly designed, commercial-grade dual heat exchanger for optimum durability.  Homeowners get the reliability of commercial-grade construction and an industry-leading 12-year limited warranty.

Standard Features

  • Energy Factor (EF) up to .96
  • Condensing technology for high efficiency and energy savings
  • Enough capacity to supply continuous hot water simultaneously to multiple plumbing demands
  • Significant space savings over tank-style water heaters
  • Long-lasting design and reduced risk of flooding
  • Included isolation valves to insure professional and serviceable installations
  • Applicable for both residential and commercial applications due to commercial-grade heat exchangers
  • Temperature range with standard MC-91 controller (included): 98°F to 140°F
  • Temperature range with MCC-91 commercial controller: 98°F to185°F
  • Pair up with an air handler for efficient home heating
  • Meets California and Texas NOx emission rules
  • ENERGY STAR® qualified
  • Residential Warranty: 12-year heat exchanger / 5-year parts & labor
  • Commercial Warranty: 5-year heat exchanger & parts / 2-year labor

Installation Placement

Equipment can be placed inside or outside of the home.

Installation Placement
Maximum Input BTU

The maximum amount of heat that the unit can produce. The amount delivered into the space will be the input minus the efficiency loss also know as the output. For example a 100000 btu furnace at 80% efficiency will give you 80000 out btus of heat. The same size furnace at 95% will give you 95000 btus of heat.

Maximum Input BTU
152000 BTU
Minimum Input BTU

The amount of heat produced by the unit at the lower stage of heat. Having two stages of heat will allow for more consistent operation and greater comfort in the home.

Minimum Input BTU
15200 BTU
Gallons Per Minute
8.0 GPM
Hot Water Capacity Range

The gallons per minute of hot water that the unit is rated to provide. The actual amount of hot water generated can vary depending on your ground water temperature.

Hot Water Capacity Range
0.4 - 8.0 GPM
Power Source
120 VAC (60Hz)
Fuel Type
Natural Gas
Ignition Type
Direct Ignition
Connection Type
NPT (Threaded)
Energy Factor
Temperature Range

The minimum and maximum temperatures on the thermostat.

Temperature Range
185 - 98 °F
ENERGY STAR® Qualified

Products earn the ENERGY STAR label by meeting the energy efficiency requirements set forth in ENERGY STAR specifications. The EPA establishes these specifications based on the following set of principles:

  • Product categories must contribute significant energy savings nationwide.
  • Qualified products must deliver the features and performance demanded by consumers, in addition to increased energy efficiency.
  • If the qualified product costs more than a conventional, less-efficient counterpart, purchasers will recover their investment in increased energy efficiency through utility bill savings, within a reasonable period of time.
  • Energy efficiency can be achieved through broadly available, non-proprietary technologies offered by multiple manufacturers.
  • Product energy consumption and performance can be measured and verified with testing.
  • Labeling would effectively differentiate products and be visible for purchasers.

ENERGY STAR® Qualified
Piping Connections - Water
3/4 Inch(es)
Exhaust Venting
Product Weight
70.5 lbs
Meets CSA Standards

Canadian Standards Association

Meets CSA Standards
18 3/10 Inches
10 Inches
26 Inches
Heat Exchanger Warranty
12 Years
Parts Warranty
5 Years
Labor Warranty
1 Years

Rinnai MSA-2M Package
Rinnai MSA-2M

Multi-Water Heater Connection Kit

$109.99 Qty:
Rinnai MSA-2S
Rinnai MSA-2S

Multi-Water Heater Expansion Accessory (Use w/ MSA-2M)

$103.99 Qty:
Rinnai 224049
Rinnai 224049

Metal Pass Through Plate

$24.99 Qty:
Roof Discharge 1
Rinnai / Ubbink 184162PP

Roof Discharge Terminal - For Vertical Termination

$54.99 Qty:
Rinnai / Ubbink 223176PP

Standard Termination Kit - For Horizontal Termination

$54.99 Qty:
Rinnai / Ubbink 223177PP

21" Standard Termination Kit - For Horizontal Termination

$57.99 Qty:
Rinnai Snorkel 4
Rinnai / Ubbink 224047PP

Raised Horizontal Termination Kit ("Snorkel")

$222.99 Qty:
Rinnai PP 45 Degree Elbow
Rinnai / Ubbink 224077PP

(2-Pack) 45° Vent Pipe Elbows

$29.99 Qty:
Rinnai PP 90 Degree Elbow
Rinnai / Ubbink 224078PP

90° Vent Pipe Elbow

$21.99 Qty:
224052 Front
Rinnai / Ubbink 224079PP

19.5" Vent Pipe Extension

$23.99 Qty:
Rinnai 224053b
Rinnai / Ubbink 224080PP

39" Vent Pipe Extension

$28.99 Qty:
Rinnai PP Straight Piece
Rinnai / Ubbink 224087PP

10" Vent Pipe Extension

$18.99 Qty:
Rinnai BC-100V-1S
Rinnai BC-100V-1S

Deluxe Bathroom Control for Rinnai Tankless Water Heaters - Silver

$135.99 Qty:
BC-100V-1W Front
Rinnai BC-100V-1W

Deluxe Bathroom Control for Rinnai Tankless Water Heaters - White

$99.99 Qty:
MC-100V-1S Front
Rinnai MC-100V-1S

Deluxe Control for Rinnai Tankless Water Heaters, Silver

$88.99 Qty:
Rinnai MC-100V-1W Front
Rinnai MC-100V-1W

Deluxe Control for Rinnai Tankless Water Heaters - White

$88.99 Qty:
MC-91-1S Front
Rinnai MC-91-2S

Standard Control for Rinnai Tankless Water Heaters - Silver

$61.99 Qty:
MC-91-1W Front
Rinnai MC-91-2W

Standard Control for Rinnai Tankless Water Heaters - White

$61.99 Qty:
Rinnai MSA-2S
Rinnai REU-MSB-C1

Multi-Water Heater Expansion Accessory (Use w/ REU-MSB-M)

$43.99 Qty:
Rinnai MSA-2S
Rinnai REU-MSB-C2

Multi-Water Heater Expansion Accessory (Use w/ REU-MSB-M)

$43.99 Qty:
Rinnai MSA-2S
Rinnai REU-MSB-C3

Multi-Water Heater Expansion Accessory (Use w/ REU-MSB-M)

$32.99 Qty:
Rinnai MSA-2M Package
Rinnai REU-MSB-M

Multi-Water Heater Connection Kit

$108.99 Qty:
Honeywell AMX3-T
Honeywell AMX300T

Thermostatic Mixing Valve Kit with 8" Flex Connector

$130.99 Qty:

Get expert assistance from our team

Call our product specialists at 800-865-5931
Mon-Fri 7am-7pm, Sat 9am-2pm CT


Or ask us here: