A 40-gallon electric storage water heater can suit a small or medium household that wants a tank-style supply of hot water. Among these options, the GE Smart Short is best for buyers who want Wi-Fi controls, the GE Lowboy is best where installation height is limited, and the GE short and tall models offer straightforward tank choices. The portable immersion heater is not a 40-gallon storage appliance, so it is included only as a limited-use alternative.
| Product | Best For | Standout Feature |
|---|---|---|
| GE Smart 40-Gallon Short | Remote monitoring and controls | Built-in Wi-Fi |
| GE40L08BSM Lowboy | Low-clearance locations | Lowboy profile |
| GE40S08DAT Short | Compact tank installation | 63-gallon first-hour rating |
| GE40T08DAT Tall | Homes with room for a taller tank | True 40-gallon capacity |
| Portable Immersion Heater | Small batches of water | Portable 2,000-watt design |
GE Smart 40-Gallon Short Electric Water Heater
Best for: Buyers who want a 40-gallon tank with connected controls and monitoring. This short electric model combines a genuine 40-gallon capacity with built-in Wi-Fi powered by SmartHQ.
Its listed features let users adjust temperature, check how much hot water is in the tank, schedule vacation mode, and receive notifications. The product information gives a 65-gallon first-hour rating, which describes hot-water delivery during the first hour under the DOE measurement method. It is a useful comparison point when assessing household demand, but it is not the same as tank capacity.
Why it was selected: It is the clearest match for shoppers looking for a conventional 40-gallon storage heater with smart features. Choose it if app-based settings and usage visibility matter to you.
Limitation: Wi-Fi features require a compatible network and connected-device setup. The listing identifies it as a short model, so confirm the available space and installation dimensions before purchase.
GE40L08BSM 40-Gallon Lowboy Electric Water Heater
Best for: Homes where ceiling height or another clearance restriction makes a taller tank difficult to place. The lowboy shape is designed to make use of tight spaces where height is a concern.
This electric model has two 5,500-watt heating elements, an inlet tube, and a side port. The listed DOE first-hour rating is 63 gallons. The product information describes it as suitable for a household of two to four people, though actual hot-water needs depend on routines, fixtures, and how many demands occur at once.
Why it was selected: Its low-profile design addresses a specific installation problem that standard tall tanks may not solve. Choose this model if the available location is short on vertical clearance and its dimensions and connections fit the site.
Limitation: The product features do not provide its exact height, width, or connection layout. Verify those details with the seller or product documentation and have the electrical requirements checked before installation.
GE40S08DAT 40-Gallon Short Electric Water Heater
Best for: Buyers who need a short tank and prefer a model with specified electrical and performance details. The listing states that the tank holds a true 40 gallons and delivers 63 gallons during the first hour under the DOE First Hour Rating.
Two 4,500-watt heating elements operate at 240 volts, and the listed requirement is 25 amps. The manufacturer describes the model as suitable for households of two to four people with consistent daily hot-water needs. Those details make it easier to compare the unit with other electric tanks and check whether its installation requirements suit the home.
Why it was selected: It pairs a compact short format with a clearly stated capacity and first-hour rating. Choose it if you need a short tank and want to compare the electrical specifications before arranging installation.
Limitation: Its 240-volt, 25-amp electrical requirement must match the home’s circuit and local installation requirements. Confirm the tank dimensions and electrical setup before buying.
GE40T08DAT 40-Gallon Tall Electric Water Heater
Best for: Households with enough vertical clearance for a tall tank who want a standard-capacity electric storage option. The product information states that the unit holds a true 40 gallons.
Its two 4,500-watt heating elements operate at 240 volts, with a listed 25-amp requirement. The DOE first-hour rating is 57 gallons. The product description identifies it as an option for families of two to four people and says the dual elements support recovery after hot-water use.
Why it was selected: It offers a tall-tank alternative to the short models in this group, with the same stated capacity and electrical specifications as the GE short model but a different first-hour rating. Choose it if the installation area can accommodate a tall unit.
Limitation: The listed first-hour rating is lower than the 63- and 65-gallon figures on several other products here. Compare the rating with your household’s peak-use pattern rather than relying on tank capacity alone.
Portable 2,000-Watt Immersion Water Heater
Best for: People who need to heat a small amount of water in a suitable container, such as for a temporary or portable use. This is not a 40-gallon automatic storage water heater; it is a submersible 2,000-watt heater intended for small batches.
The listed features include a 304 stainless steel guard, an LCD thermometer, and operation on 110–125 volts AC. The product description says it can heat up to five gallons and instructs users to fully immerse the heater before connecting power. It is limited to heating water, not other liquids.
Why it was selected: It is the only portable heating option among the supplied products and may serve a separate small-batch need. It is not a replacement for a household tank that stores and supplies hot water to multiple fixtures.
Limitation: It does not store 40 gallons or provide a whole-home hot-water supply. Follow the product’s immersion and operating instructions, and do not treat it as a substitute for a professionally installed storage heater.
Buying Guide: How To Choose A 40-Gallon Storage Water Heater
Is a 40-gallon tank the right capacity?
Capacity is only one part of choosing a water heater. Consider how many people use hot water, how often showers overlap with laundry or dishwashing, and how concentrated those demands are. The product listings describe several models as suitable for two to four people, but that is a general guide, not a guarantee that every household will have enough hot water.
Compare tank capacity with the first-hour rating. The first-hour rating estimates how much hot water a fully heated tank can deliver during an hour of use, including water reheated during that period. In this group, listed ratings range from 57 to 65 gallons. A higher figure may better suit periods of concentrated demand, but household habits and installation conditions still matter.
Should you choose a short, tall, or lowboy model?
Measure the installation area before selecting a tank style. A short model can suit a location with limited height, while a tall model needs more vertical clearance. A lowboy design is specifically intended for tight spaces where height is a concern. Compare the product’s actual dimensions with the available floor area, ceiling clearance, piping, and access needed for installation and future service.
Do not assume that models with the same stated capacity have the same dimensions or connection positions. Confirm these details in the product documentation before purchase. Where replacing an existing unit, compare the old heater’s position, electrical supply, and plumbing connections with the proposed unit.
How important are the heating elements and electrical requirements?
Check the voltage, amperage, and element wattage against the home’s electrical setup. The GE short and tall models list two 4,500-watt elements operating at 240 volts and requiring 25 amps. The lowboy model lists two 5,500-watt elements, but its supplied product information does not state the full circuit requirement. Confirm electrical specifications for any model before installation.
Higher wattage alone does not establish which model is best for a particular home. The installation must meet applicable electrical and local requirements. Ask a qualified professional to assess the circuit and installation site when those details are uncertain.
Do you need Wi-Fi or connected controls?
The GE Smart model adds built-in Wi-Fi features for temperature adjustment, tank hot-water monitoring, vacation scheduling, and notifications. These functions may be useful for buyers who want remote access or a way to check the heater’s status. If connected features are not a priority, compare the other models based on their tank style, stated first-hour rating, and installation specifications instead.
Smart controls do not change the need to check physical fit, capacity, and electrical compatibility. Consider whether the home has a suitable network and whether app-based control is useful for the people who will operate the heater.
What should you verify before ordering?
- Confirm that the model is a storage tank heater and that its stated capacity meets your needs.
- Measure the installation space and check the heater’s exact dimensions.
- Compare first-hour ratings if your household has simultaneous hot-water demands.
- Check voltage, amperage, element specifications, plumbing connections, and local installation requirements.
- Review the complete product documentation for details not included in the supplied feature list.
Frequently Asked Questions
What does a 40-gallon water heater capacity mean?
It refers to the amount of water the tank is stated to hold. It does not mean the heater can deliver only 40 gallons of hot water in an hour; the first-hour rating also accounts for reheating during use.
Is a 40-gallon water heater enough for a family of four?
It can be suitable for some four-person households, and several listings describe their models as intended for two to four people. Actual suitability depends on peak demand, routines, and the heater’s first-hour rating.
What is the difference between a short and tall water heater?
They use different tank profiles to fit different installation spaces. Check the exact dimensions and required clearances rather than choosing by the short or tall label alone.
What is a lowboy water heater best for?
A lowboy model is intended for locations where height is limited. Verify the unit’s dimensions and connections to make sure it fits the specific installation site.
Can a portable immersion heater replace a 40-gallon storage heater?
No. The listed immersion heater is designed for small batches of water and does not store 40 gallons or supply a home’s fixtures like a household tank.
Should I compare tank capacity or first-hour rating?
Compare both. Capacity tells you the stated tank volume, while the first-hour rating helps estimate hot-water delivery during a period of use. Consider the rating alongside your household’s peak demand.