Whole house gas tankless
Rinnai RE140iN Natural Gas Specifications
Researched from the DOE test procedures, NFPA 54 and NEC code tables, and manufacturer specifications. Updated .
Quick answer
This page collects what is actually published about the Rinnai RE140iN Natural Gas and shows what those figures produce, computed rather than transcribed. Anything the listing does not publish is not filled in with an estimate.
Published specifications
Everything here is taken from the listing or the manufacturer, and nothing is inferred.
| Specification | Value |
|---|---|
| Fuel | Natural gas |
| Condensing | No |
| Mounting | Indoor |
Published standard Source: Manufacturer listing data. A specification not listed here is one this listing does not publish. Check the installation manual for the full data plate.
Why there is no performance table on this page
This listing does not publish an input rating in BTU per hour or in kilowatts, and without one there is nothing to compute a flow rate or a recovery rate from. Estimating it from the price or from the physical size would produce a confident number with nothing behind it, so this page does not.
The installation manual for this model publishes the input rating on its data plate. Once you have that figure, the recovery rate calculator and the tankless sizing calculator will do the rest.
How it sits against the rest of its category
Other whole house gas tankless in this catalog: Rinnai RE140iP Propane, Rinnai RX130iN Condensing, Rinnai RX160iN Condensing, Takagi T-H3S-OS-N Condensing Outdoor.
Compare them on input rating and on the figures the manufacturer actually publishes rather than on the headline number in the listing title, which in this category is frequently a maximum measured under conditions the listing never states.
Other whole house gas tankless
Rinnai RE140iP Propane
$795.69The propane sibling of the RE140iN. Buying the wrong fuel version is the most common ordering mistake on a tankless unit, because the model numbers differ by one letter.
Best for: Propane properties replacing a non-condensing unit
Check price on Amazon
Rinnai RX130iN Condensing
$1,264.20A condensing unit with Rinnai sensing electronics, which matters most for the cold water sandwich a tankless produces when a tap is cycled on and off.
Best for: Households that run short, repeated draws
Check price on Amazon
Rinnai RX160iN Condensing
$1,442.70The larger of the two RX units here. Buy the input, not the headline flow number, because input is what holds flow up when the inlet is cold.
Best for: Three bathroom houses in a cold inlet region
Check price on AmazonFrequently asked questions
- What are the specifications of the Rinnai RE140iN Natural Gas?
- The listing publishes fuel, condensing, mounting and related figures, shown in full in the table on this page. Anything not shown is something the listing does not publish, and this page does not estimate it.
- Is this page based on hands-on testing?
- No, and we never claim otherwise. Everything here is compiled from the manufacturer listing, published specifications and the energy relations that turn those specifications into flow and recovery figures. We do not test products in person. Where a figure is not published, this page says so rather than estimating it.
- Are the prices on this page current?
- They come from verified catalog data at the time the page was built, and prices in this category move often. Treat any price shown as a guide and check the listing itself before deciding. Availability moves even faster than price does on water heater accessories in particular.
A water heater is a pressure vessel. The temperature and pressure relief valve is the one component on it that is never capped, plugged or removed, and a valve that will not open when you lift the test lever has failed and needs replacing rather than ignoring. If the valve weeps after the heater runs, that is thermal expansion in a closed system and the answer is an expansion tank or a pressure reducing valve, never a cap.