Product Guide

Only Takagi incorporates true commercial-grade heat exchangers in our tankless heaters (D2, 510U/C, or 510U, 510C,
H3, 540P, CT-199 and M50 non-ASME models). All aspects of the heat exchanger are designed to add the durability and
reliability that is vital to any successful commercial organization or business.
Commercial-Grade Copper Alloy
Our commercial-grade copper is a heat-resistant copper alloy, with additive elements that make it much stronger and harder
than the standard C1220 copper used in most other heat exchangers. Our commercial-grade copper has 8 times the tensile
strength of regular copper. Even at high temperatures, our commercial-grade copper maintains a fine grain and high strength.
Commercial-grade copper provides resistance to the damaging effects of erosion that can cause heat exchangers to leak.
Drum Thickness
During every ignition cycle, thermal expansion causes all heat exchangers to undergo heat stress. After the thousands of ON/
OFF cycles typically seen in a commercial application, this heat stress can prove damaging. This is why the heat exchangers
in our commercial and light commercial products utilize drums that are 25% thicker, ensuring the longevity of our products. A
thicker drum creates less strain on the heat exchanger.
Commercial-Grade Copper Tubing
water
water
0.016" (0.4mm)
A thicker drum creates less strain on the heat exchanger.
0.020" (0.5mm)
drum coil
drum coil
water
water
drum coil
drum coil
drum
drum
25% Thicker
A thicker drum creates less
strain on the heat exchanger
A thinner drum strains more
under heat stress
DURABILITY
HEAT EXCHANGER WITH COMMERCIAL-GRADE COPPER
water
water
0.016" (0.4mm)
A thicker drum creates less strain on the heat exchanger.
0.020" (0.5mm)
drum coil
drum coil
water
water
drum coil
drum coil
drum
drum
25% Thicker
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