When your Girard GSWH-2 tankless water heater stops delivering consistent hot water, a failed or degraded heat exchanger is often the culprit. This is the genuine OEM replacement heat exchanger assembly (part number 2GWH-29, SKU 11-9178) -- engineered to restore full heating performance, efficiency, and reliable hot water delivery to your RV's on-demand system.
The heat exchanger is the core of any tankless water heater -- it is where combustion heat transfers directly into your water supply. Over time, mineral scale buildup, corrosion, or physical damage from freezing can degrade heat transfer efficiency or cause leaks. Replacing the exchanger with a correct OEM assembly brings the heater back to factory spec without replacing the entire unit.
This assembly is manufactured to meet the same tolerances as the original component installed at the factory. It fits the Girard by Lippert GSWH-2 tankless water heater -- the propane-fired, on-demand unit commonly found in Class A, Class C, fifth wheels, and luxury travel trailers. If your unit is the GSWH-2 (not the GSWH-1 or later GSWH-3 variant), this is your part.
Manufactured to Girard by Lippert OEM specifications for the GSWH-2 series. Direct drop-in -- no modification required.
Produced domestically to OEM quality standards, ensuring material consistency and dimensional accuracy.
Corrects loss of heating output, inconsistent water temperature, and extended heat-up times caused by a degraded exchanger.
Heat exchangers are fragile in shipping. We inspect every unit and add protective packaging beyond the manufacturer's standard box before it leaves our warehouse.
In the GSWH-2, propane combustion gases pass through or around a coiled water tube. The heat exchanger assembly contains these water passages and the surrounding thermal transfer structure. Water enters cold, absorbs heat as it flows through, and exits at the set temperature -- all on demand, with no tank to maintain. A cracked, scaled, or corroded exchanger directly reduces this heat transfer and can allow combustion gases or water to leak internally.
Replacement requires removing the GSWH-2 from its exterior compartment and disconnecting the water inlet/outlet fittings and propane supply line. The heat exchanger mounts within the heater chassis and connects to the burner assembly. Shut off propane at the tank and depressurize the water system before beginning work. Use thread sealant rated for potable water on all water-side connections.