Product Guide

Specifications
7-7/8" (199 mm)
GAS 5-1/8" (131 mm)
COLD 6-3/4" (172 mm)
HOT 5-1/2" (140 mm)
7-1/2" (189 mm)
GAS 5-7/8" (147 mm)
Condensate drain port
COLD 5/8" (17 mm)
HOT 4-3/4" (120 mm)
17-5/8" (448 mm)
6-1/4" (159 mm)
5-3/4" (147 mm)
120 VAC 3" (77 mm)
120 VAC 6-7/8" (174 mm)
∅
Drain port
Female
10-3/4" (272mm)
22-1/22" (570 mm)
Condensate drain port
4" (102 mm)
2-5/8" (68 mm)
Exhaust
Intake
Female
∅
7-7/8" (199 mm)
7-1/2" (189 mm)
7" (180 mm)
4" (101 mm)
17-3/4" (450 mm)
HOT 4-3/4" (120 mm)
6-3/4" (170 mm)
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
23-5/8" (600 mm)
2-5/8" (65 mm)
5-3/4" (147 mm)
11-1/4" (285 mm)
1/2 (13 mm)
GAS 5-1/8" (131 mm)
HOT 5-1/2" (140 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
6-1/4" (159mm)
4" (102 mm)
24-7/8" (631 mm)
120 VAC 3" (77 mm)
Drain port 6" (152 mm)
120 VAC 6-7/8" (174 mm)
7-7/8" (199 mm)
GAS 5-1/8" (131 mm)
COLD 6-3/4" (172 mm)
HOT 5-1/2" (140 mm)
7-1/2" (189 mm)
GAS 5-7/8" (147 mm)
Condensate drain port
COLD 5/8" (17 mm)
HOT 4-3/4" (120 mm)
17-5/8" (448 mm)
6-1/4" (159 mm)
5-3/4" (147 mm)
120 VAC 3" (77 mm)
120 VAC 6-7/8" (174 mm)
∅
Drain port
Female
10-3/4" (272mm)
22-1/22" (570 mm)
Condensate drain port
4" (102 mm)
2-5/8" (68 mm)
Exhaust
Intake
Female
∅
7-7/8" (199 mm)
7-1/2" (189 mm)
7" (180 mm)
4" (101 mm)
17-3/4" (450 mm)
HOT 4-3/4" (120 mm)
6-3/4" (170 mm)
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
23-5/8" (600 mm)
2-5/8" (65 mm)
5-3/4" (147 mm)
11-1/4" (285 mm)
1/2 (13 mm)
GAS 5-1/8" (131 mm)
HOT 5-1/2" (140 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
6-1/4" (159mm)
4" (102 mm)
24-7/8" (631 mm)
120 VAC 3" (77 mm)
Drain port 6" (152 mm)
120 VAC 6-7/8" (174 mm)
0
1
2
3
4
5
6
7
8
9
10
20 40
H3: Flow Rate vs. Temperature Rise
60 80 100 120 140
Set temperature: 125°F or lower
Set temperature: 130°F or higher
11
H3: Pressure Loss
0
5
10
15
20
25
30
35
40
45
50
20
40
60
80
100
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Set temperature: 125°F or lower
Set temperature: 130°F or higher
0
Indoor and Outdoor Installation Options
Power Vent or Power Direct Vent Design
Ultra-Low NOx Emissions
Flow Rate up to 10 GPM
• Values based on factory testing. 0.4 GPM required for
continuous fire after initial ignition
Water Pressure: 15-150 psi
• Pressure Only Relief Valve Requires (Min 199,000 btu/h,
150 psi).
• 40 psi or above recommended for max. flow
Dimensions
Easy-Link up to 4 heaters or connect
up to 20 heaters with a Multi-Unit
Controller
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
H3: Flow Rate vs. Temperature Rise
Temperature rise (°F)
Flow rate (gpm)
H3: Pressure Loss
Flow Rate (gpm)
Pressure Loss (psi) Head (ft)
36