Is the E6N-40R 110 right for your home?
The American E6N-40R 110 is a 40-gallon nominal short electric water heater with 37 gallons of rated storage. Its 49¾-inch height provides more overhead room than the 40-gallon tall model, while its 20½-inch diameter requires a wider footprint. American lists a 55-gallon first-hour rating and six-year limited tank and parts coverage.
This model can be a useful replacement where a tall tank would crowd overhead piping or shelving. WHE checks the actual opening, drain-pan size and front service access rather than assuming that every heater described as short will fit. The 38-gallon lowboy is a different model with a different height and delivery rating.
American E6N-40R 110 specifications
| Model / product item | E6N-40R 110 / 100267083 |
|---|---|
| Nominal capacity / rated storage | 40 gallons / 37 gallons |
| Type / installation | Short electric storage tank / indoor |
| Uniform Energy Factor | 0.92 UEF |
| First-hour rating | 55 gallons |
| Standard recovery at a 90°F rise | 21 gallons per hour at the sheet’s standard 4,500W rating |
| Voltage / electrical configuration | 240V; series standard is dual 4,500W elements — conflicting product-page fields require verification below |
| Drawing A: height / C: diameter | 49¾ / 20½ inches |
| Water connections | Top; ¾-inch male connections on 8-inch centers |
| Insulation blanket included | No |
| Limited tank / parts warranty | 6 years / 6 years, subject to the written warranty |
Rated storage is the water held in the tank. First-hour rating measures hot-water delivery during a standardized test, including water heated during that hour. UEF is an efficiency comparison; it does not predict a particular household’s bill.
Dimensions and replacement fit
The listed 49¾-inch height and 20½-inch diameter describe the heater, not the complete installation space. Allow for the drain pan, top water and electrical connections, relief-valve discharge and room to service the front panels, drain valve and anode. WHE also checks the access route and floor support with the tank full.
A short tank is not the same as a lowboy. If this height is still too great, compare the separate 38-gallon and 48-gallon blanket-included lowboy guides, using their actual dimensions and delivery ratings.
Electrical configuration and manufacturer documents
Verify the electrical configuration before ordering. American’s product-page description and series specification sheet describe two 4,500W elements, while the same product page’s technical fields list one element and 5,500W maximum wattage. Those entries conflict. This guide uses the sheet’s standard 4,500W ratings for comparison; it does not establish the electrical configuration of a delivered unit. WHE checks the equipment nameplate, wiring diagram and supplier’s exact configuration before confirming the circuit and replacement.
The 110 suffix is a model-series identifier, not the supply voltage. This is a 240V electric water heater. Circuit suitability depends on the actual nameplate and installation instructions.
The product-page download labeled NRESS00315 opens a sheet marked NRESS00117, January 2023. American also publishes a March 2025 NRESS00117 sheet; its capacity, first-hour rating, UEF and A/C dimensions for E6N-40R agree with the earlier sheet. Use the exact supplied unit’s documentation for final installation planning.
Compare 40- and 50-gallon tall and short models
| Model | Nominal / rated storage | First-hour rating | Height × diameter |
|---|---|---|---|
| E6N-40H 110 (tall) | 40 / 36 gal | 53 gal | 61¼ × 18 in. |
| E6N-40R 110 (short) | 40 / 37 gal | 55 gal | 49¾ × 20½ in. |
| E6N-50H 130 (tall) | 50 / 46 gal | 62 gal | 59 × 20½ in. |
| E6N-50R 110 (short) | 50 / 46 gal | 57 gal | 49¼ × 23 in. |
The 40-gallon tall is narrower but 11½ inches taller. The 50-gallon short offers nine more gallons of rated storage, but its first-hour rating rises by only two gallons. That is why we compare stored reserve and tested delivery separately instead of choosing solely from the gallon label.
All four standard configurations list 0.92 UEF and 21 GPH recovery at a 90°F rise. WHE compares your busiest period of use, shower flow and overlapping appliances with the delivery ratings. A fixed number of people is not enough to size a replacement reliably.
Installation, maintenance and six-year limited warranty
WHE reviews the drain pan and drainage route, water pressure, thermal expansion, temperature-and-pressure relief discharge and service access as part of the installation scope. These conventional electric tanks do not use a combustion flue or the airflow and condensate arrangements of a heat-pump water heater.
The standard tall and short series includes an Incoloy stainless steel lower element, anode protection, a glass-lined tank, a brass drain valve and a self-cleaning dip tube. That dip tube helps control sediment; it does not replace flushing, anode inspection or other maintenance in the manual.
American lists six-year limited tank and parts coverage. Eligibility, use, installation and maintenance conditions apply. The warranty does not provide six years of included labor, removal or reinstallation. Review the certificate supplied with the heater before assuming a particular service cost is covered.
Official sources and local installation
Sources checked October 17, 2026: American E6N-40R 110 product page, its linked series specification sheet, installation and care manual and limited warranty. The manufacturer uses the photograph shown here across its short product pages; it is a representative image, and proportions or label details can vary.
For Palm Beach Gardens, Jupiter and nearby Palm Beach County homes, send WHE photos of the current heater’s label, piping and surrounding space when requesting an estimate. Visit our American water heater installation page or browse the water heater model catalog.
American E6N-40R 110 FAQs
How much water does the E6N-40R 110 store?
It is a 40-gallon nominal model with 37 gallons of rated storage. Its 55-gallon first-hour rating measures delivery during the standardized first-hour test, not the volume stored at one time.
Is the E6N-40R 110 the same as the E6N-40RW?
No. The W-suffix version is a lower-wattage variant. American’s series sheet lists different first-hour delivery and recovery ratings for E6N-40RW. This guide covers the E6N-40R, using the standard 4,500W series ratings for comparison and requiring the actual nameplate to be verified.
What electrical supply does this model need?
American lists 240V, but its product page conflicts with the series sheet on element count and wattage. The sheet’s standard configuration uses two 4,500W elements. WHE verifies the exact unit’s nameplate and wiring requirements before confirming the installation.
Does it include an insulation blanket?
No. American marks this standard short product as having no included insulation blanket. It is a different model from the blanket-included lowboys.
Does the six-year warranty include installation labor?
The listed six-year coverage is limited tank and parts coverage. Labor, removal, reinstallation and other costs are governed by the written terms and are not automatically included for six years.