Noritz vs. Rinnai vs. Takagi

Compare Noritz vs. Rinnai vs. Takagi, specifications and top features so you can buy the best tankless water heater for home use, for heating potable water and home space. Find out which manufacturer has the largest selection of models, most Energy Star models and water heaters with the best features.

Tankless Water Heater Comparison

Rinnai Specifications - Technical Data

Models
---
Specifications
BTU
Min/
Max
Efficiency
EF
Flow
Min/ Max
GPH
Temp
Min/ Max
F
# of
baths
Remote /
Controller
V53
Outdoor (O)
19,000
120,000
0.82 0.6
5.6
98
140
2 1/2 No
V65
Indoor+ Outdoor
(I+O)
10,300
150,000
0.82 0.4
6.6
98
140
2 1/2 Yes
V75
I+O
10,300
180,000
0.82 0.4
7.5
98
140
3 1/2 Yes
RL75
I+O
10,300
180,000
0.82 0.4
7.5
98
140
3 1/2 Yes
RU80
I+O
15,200
152,000
0.96 0.4
5.6
98
140
3 1/2 Yes
RL94
I+O
10,300
199,000
0.82 0.4
9.8
98
140
4 Yes
RU98
I+O
15,200
199,000
0.95 0.4
9.8
98
140
4 Yes

Rinnai Best Features

  • Warranty - 12 years

  • Low NOx burner

  • Safety: Flame failure - Flame Rod, Boiling protection, Combustion fan rpm check, Over current - glass fuse, Remaining flame (OHS), Thermal fuse, Automatic frost protection

  • Type; forced combustion

  • RU80 and RU98 are condensing

  • Recirculation mode

  • Use: potable water and hydronic space heating


Noritz Specifications - Technical Data

Models
---
Specifications
BTU
Min/
Max
Efficiency
EF
Flow
Min/ Max
GPH
Temp
Min/ Max
F
# of
baths
Remote /
Controller
NR50
Outdoor (O)
19,000
120,000
0.82 0.5
5.0
100
160
1 1/2 No
NR66
Indoor+ Outdoor
(I+O)
20,000
140,000
0.82
0.84
0.5
6.6
100
160
2 No
NR71
I+O
25,000
180,000
0.82
0.83
0.5
7.1
100
160
2 1/2 No
NR83
I+O
18,000
180,000
0.82
0.83
0.5
8.3
100
140
2 Yes
NR981
I+O
16,000
199,900
0.82
0.88
0.5
9.8
100
140
3 Yes
NR111
I+O
11,000
250,000
0.82 0.5
11.1
100
150
4 Yes
NRC98
I+O
16,000
180,000
0.92
0.94
0.5
9.8
100
140
4 Yes
NRC111
I+O
16,000
199,900
0.91
0.92
0.5
11.1
100
140
4 Yes

Noritz Best Features

  • Warranty - 12 years

  • Low NOx burner

  • Safety: Flame failure - Flame Sensor, Overheat Prevention Device,
    Lightning Protection Device, Freeze Protection

  • NRC98 and NRC111 are condensing

  • Recirculation compatible

  • Battery back-up compatible
  • Use: potable water and hydronic space heating

  • Venting; single vent and coaxial type
  • Some models have commercial grade heat exhangers and dual flame burners

  • Communication cable to connect two units into one system for bigger capacity

Takagi Specifications - Technical Data

Models
---
Specifications
BTU
Min/
Max
Efficiency
EF
Flow
Max
GPH
Temp
Min/ Max
F
# of
baths
Remote /
Controller
T-K Jr2
IN/OS
19,500
140,000
0.82
0.83
6.6 99
167
2 Yes
T-K4
IN/OS
11,000
190,000
0.82
0.83
8.0 99
167
3 Yes
T-D2
IN/OS
11,000
199,000
0.82
0.83
10 99
185
4 Yes
T-K Jr2U
IN/OS
10,300
180,000
0.82 7.5 99
167
3 1/2 Yes
T-K4U
IN/OS
15,200
152,000
0.96 5.6 99
167
3 1/2 Yes
T-D2U
IN/OS
10,300
199,000
0.82 9.8 99
167
4 Yes
T-H3
IN/OS
15,000
199,000
0.95 8 99
167
4 Yes
T-H3S
IN/OS
15,000
180,000
0.95 10 99
167
3 Yes
T-H3J
IN/OS
15,000
160,000
0.95 6.6 99
167
2 Yes

Takagi Best Features

  • Warranty - 12 years.

  • Direct vent convertible for indoor models.

  • Safety: Air-Fuel Ratio (AFR) sensor, Exhaust & Water Temperature safety Control, Overheat Cutoff Fuse, Internal Freeze-Protection System.

  • Some models use Easy-link up to 4 units without multi unit controller.

  • Multi-Link up to 20 units.
  • T-H3 are condensing models.

  • Ultra Low NOx models available.
  • Recirculation and hydronic heating available.


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