Product Guide

D2 Series 510U/C Series H3/CT-199 Series M50 Series
Easy-Link (No Controller Necessary)
Up to 4 units Up to 4 units Up to 4 units Up to 4 units
Maximum input (BTU/h)
796,000 796,000 796,000 1,520,000
Multi-Unit*
N/A Up to 20 units Up to 20 units Up to 10 units
Maximum input (BTU/h)
N/A 3,980,000 3,980,000 3,800,000
*Requires Multi-Unit Controller: 100112691
Takagi tankless water heaters have the capability to
link multiple heaters together to act as a system. The
primary heater is rotated to ensure even operation of
all heaters. The D2,510U/C, H3, CT-199, and M50
series models can Easy-Link up to four units using included
communication cables.
For even larger applications the 510U (series 200),
510C, H3, CT-199, and M50 series models also feature
the Multi-Unit System, allowing a greater number of units
to work together as an integrated system using a Multi-
Unit System Controller. The Multi-Unit System can control
up to twenty 510U (series 200), 510C, H3, and CT-199
or up to ten M50 heaters.
MULTI- UNIT SYSTEMS
Unit Comparison
The Takagi common venting system utilizes fewer
unique components so you can design your venting
based on project requirements.
• More design flexibility
• Fewer wall penetrations
• Able to use schedule 40 PVC on intake and
exhaust
• Heaters don’t de-rate when common vented
• Design doesn’t override redundancy benefits
COMMON VENTING
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