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Our heat exchanger is, 1. Stainless steel fin-enhanced tubes, 2. Double wall tubes, with vented, 3. CE Approved - details see: https://www.machineto.com/ce-approved-stainless-steel-double-wall-heat-exchanger-10242017

Heat Exchangers

Designed using the natural thermoiphon on the domestic hot water side, our heat exchangers not only provide faster heating at a greater capacity than traditional sidearms, they prevent cross contamination in potable water application.

While the capacity of traditional sidearm heat exchanger is determined by the length of sidearm tubes and their heat transfer efficiency is comparitively very low.Instead of using two bare copper tubes,our finenhanced heat exchangers made of stainless steel and will have high heat transfer efficiency resulting from the utilization of an internal finned tube.This fin-enhanced design has a surface are five to eight times bigger than the bare tube design and produces significant turbulence on the system side.Our fin-enhanced sidearms provide a larger capacity and faster hearing using a shorter unit.Fin-enhanced sidearms are available upon request.

Nominal Performance and Specification Table

Model	Nominal Capacity		System Water				DHW Water				DHW Side	System side
			Flow Volume		Pressure drop		Flow Volume		Pressure drop
	kW	kBtu/Hr	l/min	USGPM	kPa	psig	l/min	USGPM	kPa	psig
FES-95	5.43	18.5	1.94	0.5	4.9	0.7105	4.33	1.1	13.9	2.0155	3/4"	3/4"
FES-115	6.6	22.5	2.36	0.7	5.1	0.7395	5.26	1.4	14.2	2.059	3/4"	3/4"
FES-95DW	4.55	15.5	1.94	0.5	5.3	0.7685	4.33	1.1	14.6	2.117	3/4"	3/4"
FES-115DW	5.28	18.0	2.36	0.7	5.6	0.812	5.26	1.4	15.1	2.1895	3/4"	3/4"