Name: Rheem ProTerra Plug-in 40 Gal
Brand: Rheem
Price: 1699.00 USD

2.4/5#23 of 23 in 40–50 gallon heat pump water heaters
2.4

A plug-in for replacing a gas tank in a mild-climate garage or basement without new wiring. Buy a size up, since it has no element to fall back on.

40 galSize
2.80UEF
45 galFirst hour
Plug-in 120 VPower
37 °FRuns down to
10 yr tankWarranty

Check price at Home Depot$1,699

Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

Plugs into a standard 120 V outlet, so it can replace a gas tank without a new 240 V circuit
Built-in Wi-Fi: set schedules and vacation mode from the EcoNet app
10-year tank and parts warranty plus 1 year of labor

Cons

No backup element: hot water depends entirely on the heat pump, so heavy use can run it out
Lower efficiency than 240 V models: a certified UEF of 2.80
Only 45 gallons in the first hour, so back-to-back showers can run it out

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Efficiency 2.80 UEF0
Hot water 45 gallons in the first hour0
Warranty 10-year tank, 10-year parts, 1-year labor75
Cold rooms heat pump runs down to 37 °F room air32
Noise noise not published (neutral score used)50

Specifications

Ratings (ENERGY STAR)
Model number	XE40T10HM00U0
Size (nominal)	40 gal
Tank volume (measured)	36 gal
Uniform Energy Factor	2.80
First-hour rating	45 gal
Draw pattern	Low
Yearly energy use	780 kWh
ENERGY STAR ID	3555260
Installation
Power	Plug-in 120 V
Circuit	Shared 15 A or 20 A circuit
Backup element	None
Operating air range	37 to 145 °F
Minimum room size	700 cu ft
Size	62.3 in tall, 20.3 in across
Weight	157 lb
Refrigerant	R-134a
Features
Wi-Fi	Built in
App	EcoNet
Demand response port (CTA-2045)	Yes
Leak detection	No
Modes	Heat Pump, Vacation
Warranty and models
Warranty	10 yr tank, 10 yr parts, 1 yr labor
Also sold as	Friedrich PROH40 T0 FD120-M, Friedrich PROH40 T0 FD120-MSO, Rheem PROPH40 T0 RH120-M, Rheem PROPH40 T0 RH120-MSO, Richmond 10E40-HP120M, Richmond 10E40-HP120MS, Ruud PROUH40 T0 RU120-M, Ruud PROUH40 T0 RU120-MSO
Released	2022-04

Alternatives in this size

GE Profile 40 Gal 120V

#20 in 40–50 Gallon2.7Full review

The most efficient 120 V plug-in here, and the quietest, for replacing a gas tank without new wiring. It can be rewired for 240 V later if the household outgrows it.

GE Appliances PC Richard $2,529.97

$2,529.97

Rheem ProTerra Plug-in 50 Gal

#21 in 40–50 Gallon2.5Full review

A plug-in for replacing a gas tank in a mild-climate garage or basement without new wiring. Buy a size up, since it has no element to fall back on.

Home Depot $2,119

$2,119

A.O. Smith Voltex 120V 50 Gal

#22 in 40–50 Gallon2.5Full review

A 120 V plug-in with a backup element and leak shut-off included. Its certified efficiency is among the lowest here, so it suits replacing a gas tank more than replacing an electric one.

Lowe's $2,219

$2,219

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