Apply to be a TradeMaster!
Main product image of RL75IN 180,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)
Magnifying glass
Hover image to zoom

RL75IN 180,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)

Brand:
Rinnai
SKU:
RL75IN
Rating:
(16)
Q&A:
(3)
RL75IN 180,000 BTU, Non-Condensing Indoor Tankless Water Heater (Natural Gas)
Magnifying glass
Hover image to zoom
RL75IN has been discontinued
Discontinued January 22, 2026
This product was discontinued by the manufacturer.

Product Highlights

Product Highlight: Fuel Type
Natural Gas
Product Highlight: Installation Type
Indoor Only
Product Highlight: Temperature Range (F)
98°F to 140°F
Product Highlight: Energy Star Rated
Yes
Product Highlight: Voltage
120v
Product Highlight: Height (Inches)
23" Height

Description

Rinnai Luxury Series Tankless Water Heaters take hot water performance higher, delivering the most impressive output of our non-condensing line. Using a durable copper heat exchanger to optimize heat transfer, these high achievers attain an Energy Factor ratings of up to 0.82, making them 18 percent more efficient* than an ENERGY STAR qualified storage tank.

Featuring Rinnai's energy smart Cir-Logic technology, Rinnai's Luxury models produce an endless supply of hot water. An added external pump and dedicated recirculation line moves hot water quicker to showers and faucets. To save even more time and energy, a 24-hour digital controller can be easily programmed to ensure hot water is available during peak demand times like early morning before work and school. Add a sleek, space-saving design and robust array of standard features, and the luxury of superior comfort, convenience and savings is at every homeowner's command.

Specifications:
  • Max. BtuH Input: 180,000
  • Min. BtuH Input: 10,300
  • ENERGY STAR Qualified
  • Energy Factor of .82 for both Natural Gas and Propane
  • Certified for Installation in Manufactured (Mobile) Homes
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Temperature lock function prevents accidental or unauthorized changes to water temperature
  • Warranty (Residential) - Limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor)
  • Warranty (Commercial) - Limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)
  • Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels

Note: This unit can be upgraded to a Commercial Unit with the purchase of an optional Commercial Controller (MCC-91-2, MC-195T-US, BC-100V-1 and MC-100-1). This will increase the Temperature Range to 98° to 160°F.

Need this water heater installed? Rinnai can help! Simply call 844.348.4715.

Specs

Product Type:

Tankless Heater

Installation Type:

Indoor Only

Fuel Type:

Natural Gas

Energy Factor:

0.81

Energy Star Rated:

Yes

Type:

Concentric

Non-Condensing

BTU (Max):

180000

BTU (Min):

10300

Temperature Range (F):

98°F to 140°F

Flow Range (GPM):

0.26 - 7.5

Voltage:

120v

Hot Water Outlet (NPTF):

3/4"

Cold Water Inlet (NPTM):

3/4"

Gas Connection:

3/4"

Height (Inches):

23"

Width (Inches):

14"

Depth (Inches):

9"

Flow Rate at 50F Temp Rise (GPM):

6

Flow Rate at 60F Temp Rise (GPM):

5

Flow Rate at 70F Temp Rise (GPM):

4.3

Flow Rate at 40F Temp Rise (GPM):

7.4

Application:

Residential

Contact

Help Face
CALL US
Question? Call or text 888-757-4774
+
Help Face

Questions?

Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
MondayThursday
8am7:45pm
Friday
9am7:45pm
SaturdaySunday
9am5:45pm


You May Also Need

92 Replacement Parts

Cover for RL94IN
SKU: 109000292
Rinnai
Cap, 109000171
SKU: 109000171
Rinnai
AWG 18 Harness, 105000162
SKU: 105000162
Rinnai
Help Image
Need help finding a replacement part?
Fill out the part request form and someone will get back to you shortly.
PART REQUEST FORM

Product Reviews

4.94 out of 16 reviews
100% would recommend this product
4.94
out of 16 Reviews
100% would recommend this product
WRITE A REVIEW
5 star
94%
4 star
6%
3 star
0%
2 star
0%
1 star
0%
WRITE A REVIEW
Customer Images
Showing 1-10 of 16 reviews

Have been holding for 5 years it was worth the wait

I have a customer that ordered one of these 5 years ago and it came in damaged. Supplyhouse.com sent a new one after a few confirmation pics and told my customer to toss it because there could be a lot more wrong with it then a few dents. Being a certified Rannai repair tech i wasn't letting it go in the dumpster. Well this past weekend my tank water heater ruptured so I installed this unit beat out the dents and figured that was it. Supplyhouse.com customer service was correct to send a new unit it had a few internal issues, and sounded like a tornadoe siren cranking up. Fixed the issues it's running like a top now. Anyone not certified would not have been able to repair the unit.
Joecally
New orleans
1 years ago
Was this review helpful to you?

exalent costomer support and a great price

exalent costomer support and a great price.i needed to replace my old tankless water heater they helped identefify the product by dimencions and btu for an exact fit replacement was a snap thank you . i had the previous Reniee for about 16 years i know i'll have this one just us many they looked identical
george
haverhill mass
1 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Space saver and efficient

Hot water is hot. Still has to run a bit. I thought it would be quicker.
Nana
New York
4 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Wonderful

Shipping was fast, price was affordable. Best part is it came with all the additional hardware so no extra trips to the store inorder to install.
Euel- contractor
South Dakota
4 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

The Rinnai heater was a direct replacement

Heats up water in demand. The shipment took only 2 days and Supplyhouse was the only company I was able to find one. Very grateful. I needed one asap.
Jan
Plainview NY
4 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Great product

Easy to install. Produces plenty of hot water quickly. Efficient on gas.
Djp
Albany NY
4 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

These guys are terrific

I could not find a new water heater anywhere, until I went to Supply House. Everyone was out of stock or didn't have what I was looking for. Supply House staff helped me find a perfect match to replace my broken unit, and I got it next day! Can't say enough about this great company. Oh, the price was better also!
Sassy Senior
Vegas
4 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Fit right in and works great!

A direct replacement for my old Rinnai unit so pretty much hang it up, hook it up and hit the go button. The folks at Supplyhouse.com helped out with a freight damaged unit and promptly sent my replacement. Top notch customer service.
Les S
Hebron, KY
5 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Replacement updates

Bought a Rinnai tankless water heater, it was and updated from previous model, price very reasonable and fast shipping.
Guillermo
Wayland ma
5 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Perfect product I install in Popeyes fast food restaurant

There's nothing bad to say and the good thing is it comes with service valves I was surprised.
Jorjik
Los Angeles ca
7 years ago
Verified Buyer Icon
Verified Buyer
Was this review helpful to you?

Product Q&A

3 Questions
3 Questions
ASK A QUESTION

Q: Would this unit be sufficient for 3 bedroom 2 bath house? the distance between bathrooms is about 60 feet also a washing machine and a kitchen of course. A couple with one child.

Asked by John 10 years ago

Add your answer

* Required Field
Verified Author and ReplyVerified Reply- SupplyHouse Staff

It would depend on the total gallons per minute you would expect the unit to deliver at max capacity. The unit would be able to deliver about 4.8GPM at 120 degrees in Massachusetts.

Was this review helpful to you?

Q: difference between condensing and non condensing in tankless water heaters?

Asked by basil 10 years ago

Add your answer

* Required Field
Verified Author and ReplyVerified Reply- SupplyHouse Staff

Condensing units are higher efficiency, running the flue gases through another heat exchanger to get more out of the fuel utilized. They can also use plastic venting. Non condensing units are typically less expensive and require stainless steel venting.

Was this review helpful to you?

Q: Does it come with a flush valve kit or is this extra

Asked by Jack 11 years ago

Add your answer

* Required Field
Verified Author and ReplyVerified Reply- SupplyHouse Staff

Yes, the valve kit is included.

Was this review helpful to you?