Best Water Heat Exchanger

Rinnai CU199iP Propane Gas Condensing Tankless Hot Water Heater, 11 GPM

Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary.
multiple venting options offer installation flexibility.
Optimal Water Pressure: High-performance 11 GPM hot water flow rate for a powerful, constant stream.
Instant Heating: Circ-Logic technology enables recirculation patterns that coincide with your typical habits.
Wi-Fi monitoring creates hot water on demand.
Guaranteed to Last: 8-, 5-, and 1-year commercial warranty for heat exchanger, parts, and labor, respectively.

Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary.
multiple venting options offer installation flexibility.
Optimal Water Pressure: High-performance 9 GPM hot water flow rate for a powerful, constant stream.
Instant Heating: Circ-Logic technology enables recirculation patterns that coincide with your typical habits.
Wi-Fi monitoring creates hot water on demand.
Guaranteed to Last: 8-, 5-, and 1-year commercial warranty for heat exchanger, parts, and labor, respectively.

Endless Hot Water: Enjoy unlimited hot water flow throughout the house.
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary.
Optimal Water Pressure: Up to 9 GPM hot water flow rate for a powerful, constant stream.
Instant Heating: ThermaCirc360 technology provides faster hot water with a built-in recirculation pump, timer and thermal bypass valve - ideal for homes without a dedicated return line.
Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring..

Endless hot water, On-demand usage, Compact, Space saving, Energy conservation.
Computerized safety features, No pilot light to have to worry about.
Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes.
Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions.
Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features.

Intelligent control system with LCD display.
Submerged combustion chamber with helical heat exchanger coil.
Powered anodes-provides long-lasting tank protection in varying water conditions.

Intelligent control system with LCD display.
Submerged combustion chamber with helical heat exchanger coil.
Powered anodes-provides long-lasting tank protection in varying water conditions.

Intelligent control system with LCD display.
Submerged combustion chamber with helical heat exchanger coil.
Powered anodes-provides long-lasting tank protection in varying water conditions.

Intelligent control system with LCD display.
Submerged combustion chamber with helical heat exchanger coil.
Powered anodes-provides long-lasting tank protection in varying water conditions.

** Our Most popular FH 55 model Heater Efficiency: 580%.
**230 volts- 60 HZ for USA/ Canadian/ Mexican electricity.
** Suitable for pools up to 13'500 gallons** (Please read Item description for more details about sizing).
***In Ground/ Above Ground/ Chlorine/ Salt Water pools.
**Pure Titanium heat Exchanger... 1 1/2" Hard Pvc pipe connections- Compression type..

Pneumatically balanced for smooth, easy breathing.
Patented heat exchanger dissipates cold caused by gas expansion while drawing in warmth from the ambient water.
Easy control: the in-line ergonomic Venturi knob lets you make precise adjustments, even while wearing gloves.
High-viz yellow purge cover and accent pieces.
39”/99cm yellow hose for high visibility in case of emergency. Easily distinguishable from your primary hose.