Product Guide

Dimensions
13-3/4" (350mm)
10" (254mm)
2-1/4" (56mm)
21-3/8" (544mm) 20-1/4" (520mm)
2-1/4" (56 mm) COLD
3-7/8" (98mm) GAS
4-7/8" (124mm) HOT
1" (26mm)
4" (102mm)
4-7/8" (123mm) 120V
7-3/4" (196mm)
1-3/4" (45mm)1-3/4" (45mm)
1-7/8" (47mm)
COLD 3-1/8" (79mm)
HOT 5-1/4" (133mm)
120V 1-3/8" (36mm)
GAS 4-7/8" (124mm)
2-1/4" (57mm)
4" (101 mm)
13-3/4" (350mm)
10" (254mm)
2-1/4" (56mm)
21-3/8" (544mm) 20-1/4" (520mm)
2-1/4" (56 mm) COLD
3-7/8" (98mm) GAS
4-7/8" (124mm) HOT
1" (26mm)
4" (102mm)
4-7/8" (123mm) 120V
7-3/4" (196mm)
1-3/4" (45mm)1-3/4" (45mm)
1-7/8" (47mm)
COLD 3-1/8" (79mm)
HOT 5-1/4" (133mm)
120V 1-3/8" (36mm)
GAS 4-7/8" (124mm)
2-1/4" (57mm)
4" (101 mm)
Specifications
Indoor installation only
Power Vent or Power Direct Vent
Design
Low NOx Emissions
4” Category III Vent
Flow Rate up to 6.6 GPM
• Values based on factory testing. 0.4 GPM required
for continuous fire after initial ignition
KJr2: Flow Rate vs. Temperature Rise
100806040200.0
8.0
9.0
7.0
6.0
5.0
1.0
2.0
3.0
4.0
0
Temperature rise (°F)
10 30
50
70 90 110
KJr2: Pressure Loss
Flow Rate (gpm)
Head (ft)
100
110
120
70
60
90
80
50
40
30
10
20
0
8.06.0402.00.0
50
45
40
35
30
25
20
15
10
5
0
Pressure Loss (psi)
Water Pressure: 15-150 psi
• Pressure Only Relief Valve Requires (Min 140,000 btu/h,
150 psi).
• 40 psi or above recommended for max. flow
Warranty
• 15-year limited warranty on heat exchanger in residential
applications.
• 5-year limited warranty on heat exchanger in commercial
applications.
• 5-year warranty on all parts.
• Refer to takagi.com for further warranty details
KJr2: Flow Rate vs. Temperature Rise
Temperature rise (°F)
Flow rate (gpm)
KJr2: Pressure Loss
Flow Rate (gpm)
Pressure Loss (psi) Head (ft)
12