Product Guide

Specifications
13-3/4” (350 mm)
10-1/2” (266.5 mm)
5-7/16” (137.7 mm)
19-1/2” (495.7 mm)
20-1/2” (520 mm)
6-3/8”
(162.3 mm)
7-9/16”
(192.3 mm)
4-1/4”
(107.8 mm)
5-11/16”
(145 mm)
Cold 1-5/8” (42.0 mm)
Hot 4-1/8” (105.4 mm)
120 VAC 2-1/4” (57 mm)
Gas 4-13/16” (122.1)
1.0” (25.5 mm)
5-7/16” (137.7 mm)
Top view
Front view Side view
Boom view
13-3/4” (350 mm)
10-1/2” (266.5 mm)
5-7/16” (137.7 mm)
19-1/2” (495.7 mm)
20-1/2” (520 mm)
6-3/8”
(162.3 mm)
7-9/16”
(192.3 mm)
4-1/4”
(107.8 mm)
5-11/16”
(145 mm)
Cold 1-5/8” (42.0 mm)
Hot 4-1/8” (105.4 mm)
120 VAC 2-1/4” (57 mm)
Gas 4-13/16” (122.1)
1.0” (25.5 mm)
5-7/16” (137.7 mm)
Top view
Front view Side view
Boom view
Installations are simple and flexible with
contractor-preferred concentric venting
Long venting runs up to 43 feet and
operates in altitudes up to 10,100 feet
Gas convertible from natural gas to
propane using the included conversion kit
Flow Rate up to 8.0 GPM
• Values based on factory testing. 0.4 GPM required for
continuous fire after initial ignition.
Meets Ultra-Low NOx requirements
Dimensions
Water Pressure: 15-150 psi
• Pressure Only Relief Valve Requires (Min 190,000 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
310C: Pressure Loss
Flow Rate (gpm)
Head (ft)
100
120
60
80
40
20
0
8.06.0402.00.0
50
40
30
20
10
0
Pressure Loss (psi)
140
160
180
200
60
70
80
90
100
310C: 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
Flow rate (gpm)
Temperature rise (°F)
10.0
310C: Flow Rate vs. Temperature Rise
Temperature rise (°F)
Flow rate (gpm)
310C: Pressure Loss
Flow Rate (gpm)
Pressure Loss (psi) Head (ft)
20