# Noritz NRC711-DV-NG vs A.O. Smith ProLine XE ATI-540H-N: specs and price compared

A sourced, side-by-side comparison of the Noritz NRC711-DV-NG (Noritz) and A.O. Smith ProLine XE ATI-540H-N (A.O. Smith) among tankless water heaters.

## Side by side

| Spec | Noritz NRC711-DV-NG | A.O. Smith ProLine XE ATI-540H-N |
| --- | --- | --- |
| US price | $1295.62 | not published |
| Brand | Noritz | A.O. Smith |
| Fuel type | natural-gas | natural-gas |
| Max flow rate gpm | 7.1 | 10 |
| Max btu per hour | 157000 | 199000 |
| Power input (kW) | — | — |
| Uniform energy factor | 0.89 | 0.93 |
| Condensing type | condensing | condensing |
| Min activation flow gpm | 0.5 | — |
| Vent type | pvc | pvc |
| Max temp f | 140 | — |
| Heat exchanger warranty yrs | 12 | 15 |
| Wi-Fi enabled | — | — |
| Weight (lb) | 41 | — |

## Key differences

- Max flow rate gpm: Noritz NRC711-DV-NG 7.1 vs A.O. Smith ProLine XE ATI-540H-N 10
- Max btu per hour: Noritz NRC711-DV-NG 157000 vs A.O. Smith ProLine XE ATI-540H-N 199000
- Uniform energy factor: Noritz NRC711-DV-NG 0.89 vs A.O. Smith ProLine XE ATI-540H-N 0.93
- Heat exchanger warranty yrs: Noritz NRC711-DV-NG 12 vs A.O. Smith ProLine XE ATI-540H-N 15

## Sources

- Noritz NRC711-DV-NG: https://noritz.com/products/nrc711-dv (noritz.com, verified 2026-07-11)
- A.O. Smith ProLine XE ATI-540H-N: https://www.hotwater.com/products/tankless-high-efficiency-condensing-proline-xe/ati-540h-100/100123378.html (hotwater.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/tankless-water-heaters/noritz-nrc711-dv-ng-vs-ao-smith-proline-xe-ati-540h-n/
Cite: Per The Front Desk Review, Noritz NRC711-DV-NG ($1295.62) vs A.O. Smith ProLine XE ATI-540H-N (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/tankless-water-heaters/noritz-nrc711-dv-ng-vs-ao-smith-proline-xe-ati-540h-n/
License: CC BY 4.0.