Will the InstaShower 9 Pro RV Tankless Water Heater fit in a 13×13 inch opening for a tank replacement?

You must confirm your existing mounting brackets and the clear space for the exhaust venting and plumbing adapters before ordering to avoid a costly return and a rebuild of your plumbing layout. We selected this unit for our comparison because it provides a high 66,000 BTU output for high-altitude use.

You can find our comprehensive review of the InstaShower 9 Pro for a detailed breakdown of its features.

NIDEC fan clearance and 3.6 GPM flow rate requirements for InstaShower 9 Pro

Because RV tankless water heater builds often require specific clearance for the NIDEC fan to move 300Pa of air, a tight fit could restrict the airflow needed to prevent a flame out. This unit provides a 3.6 GPM hot water flow rate, which is sufficient for a family of four. You should verify that your existing pipes align with the unit’s ports before purchase.

To see how it stacks up against competitors, view our InstaShower 9 Pro comparison analysis.

What to Check Before Buying the InstaShower 9 Pro

Confirming these details ensures the unit functions correctly within your specific RV configuration.

For a deeper dive into the technical specs, see how the InstaShower 9 Pro performs in various scenarios.

Many users wonder if the InstaShower 9 Pro can support a family of four during a shower.

• Verify that the 13″x13″ opening has enough clearance for the NIDEC fan to exhaust fumes through the required vent pipe.
• Measure your existing plumbing to ensure your inlet and outlet connections match the unit’s ports.
• Confirm your RV’s water pump provides enough pressure to meet the 3.6 GPM flow rate required to activate the heater.
• Check that your current mounting brackets can support the weight and position of the 3rd generation heater.

Alternative Options for the InstaShower 9 Pro

This RV tankless water heater—a compact device that heats water on demand as it flows through a heat exchange system—is ideal for those replacing standard gas tanks. Buyers seeking a more compact unit for a van life shower might look for options with lower BTU requirements if they do not plan to use the heater at high altitudes. For those who do not need the 66,000 BTU capacity to maintain flow at 9,800 feet, smaller units may offer different mounting configurations.

If you are running on a battery, consider selecting an rv tankless water heater for 12V systems.

If you are replacing a standard 6-gallon tank and need a high-output heater for high-altitude camping, the InstaShower 9 Pro is the correct choice.

Travelers in mountainous regions should explore the top-rated rv tankless water heater for high altitude.

Reviewed by the Refrigerant Recovery Pro editorial team. Refrigerant Recovery Pro writes these guides from the 50 most-reviewed rv tankless water heater listings in our retail dataset, not from manufacturer copy.