Best Smart Heat Pump Water Heaters With App Control and Demand-Response Features

Smart heat pump water heaters can help a household move some water-heating energy use away from expensive time-of-use periods, monitor operation from a phone, and potentially participate in a utility demand-response program. But “smart” means different things from one model to another.

Some units offer useful Wi-Fi controls but no clear pathway to a utility program. Others include a CTA-2045 EcoPort, OpenADR support, or both—features that can allow a utility or authorized provider to shift water-heating load when a local program supports it.

The best smart heat pump water heaters combine practical daily controls with clearly documented grid-ready features. The right choice still depends on your household’s hot-water demand, electrical service, installation space, and whether your utility actually offers a compatible program.

The best smart heat pump water heaters at a glance

Rheem Professional Prestige ProTerra Hybrid Electric Heat Pump with LeakGuard: Best overall feature-based pick for homeowners who want built-in Wi-Fi controls, a broad ProTerra capacity range, and CTA-2045 EcoPort readiness.
A. O. Smith Voltex AL Smart Hybrid Electric Heat Pump Water Heater: Best for clearly documented utility-grid features, including CTA-2045 compatibility and OpenADR 2.0b VEN.
Bradford White AeroTherm with Bradford White Connect: Best contractor-channel option for buyers who want optional app and demand-response capabilities.
A. O. Smith Voltex X Split Heat Pump Residential Water Heater: Best split-system option for homes where locating the heat-pump equipment outdoors makes more sense than using an all-in-one tank.

Before treating any of these as a demand-response purchase, contact your electric utility. A compatible port, app, or protocol does not guarantee that a program exists in your service territory—or that your utility accepts every compatible model.

How we evaluated smart controls and demand response

For this guide, app control was only one part of the comparison. A useful heat pump water heater with app features should let you view status and adjust settings without standing in front of the tank. The more useful systems may also support schedules, vacation modes, alerts, operating-mode changes, and energy-use reporting.

Demand response is different. During high-demand periods, a utility or authorized energy-service provider may ask connected appliances to temporarily reduce electricity use. A heat pump water heater can be well suited to this because it can heat and store water ahead of an event, then delay some heating during the event. ENERGY STAR describes connected water heaters as a potential demand-response resource when they have suitable communications and load-shifting capabilities. Its heat pump water heater design guidance also explains why a Wi-Fi app alone should not be assumed to provide utility-program compatibility.

Two terms are especially worth checking:

CTA-2045 EcoPort: A standardized physical port that can provide a pathway for utility or authorized third-party demand-response controls. It is often called an EcoPort.
OpenADR: A communications standard used for automated demand-response events. Documentation that specifically identifies OpenADR support is helpful when comparing utility-oriented features.

Time-of-use scheduling is another separate feature. It can let you favor heating during lower-rate hours, but it is not the same as enrolling in a demand-response program. You will need your utility’s rate schedule, enrollment rules, and equipment requirements before relying on either feature for savings.

Rheem Professional Prestige ProTerra Hybrid Electric Heat Pump with LeakGuard: Best overall

The Rheem Professional Prestige ProTerra Hybrid Electric Heat Pump with LeakGuard is the strongest all-around feature-based pick for homeowners who want a familiar smart-water-heater experience without giving up grid-readiness. Rheem’s ProTerra lineup pairs built-in EcoNet Wi-Fi with controls for temperature, operating mode, vacation settings, scheduling, monitoring, and energy reports.

The Professional Prestige range is offered in 40-, 50-, 65-, and 80-gallon capacities, so it provides more sizing flexibility than a single-tank recommendation. Rheem lists UEF values up to 4.07 in this range, although efficiency should not be the only deciding factor. Compare the selected model’s first-hour rating with your household’s peak hot-water use, especially if several showers, laundry loads, or a dishwasher often run close together.

For demand-response planning, the major advantage is the built-in EcoPort using CTA-2045. That does not mean the water heater will automatically join a local utility program. It means the unit has a standards-based connection path that may be useful if your utility, installer, or energy-program provider supports it.

Rheem also offers 15-amp and 30-amp versions within parts of the ProTerra family. A lower-amperage option can matter where electrical capacity is limited, but it may come with a lower first-hour rating. Do not select based on circuit size alone: ask the installer to compare the exact model’s recovery and first-hour performance against your family’s demand.

Who it is for: Homeowners who want built-in app controls, multiple tank-size options, and a well-documented CTA-2045 EcoPort in a mainstream integrated heat pump water heater.

Verify before buying: The exact ProTerra model number, its circuit requirement, first-hour rating, physical clearance requirements, condensate-drain plan, and whether the LeakGuard configuration is appropriate for your installation.

A. O. Smith Voltex AL Smart Hybrid Electric Heat Pump Water Heater: Best for utility-grid features

The A. O. Smith Voltex AL Smart Hybrid Electric Heat Pump Water Heater is a particularly relevant choice for shoppers who want documentation that goes beyond ordinary remote control. It works with the iCOMM app for remote monitoring and control, alerts, Bluetooth setup, and utility time-of-use scheduling where supported.

The Voltex AL documentation is unusually clear about demand-response communication: it lists CTA-2045 compatibility and OpenADR 2.0b VEN. Those features do not remove the need to confirm local program eligibility, but they make the Voltex AL a strong starting point when utility integration is a primary buying criterion.

A. O. Smith lists the HPTS-50 at a 3.80 UEF. The same Voltex AL series also includes the HPTS-66 and HPTS-80, listed at 3.70 and 3.88 UEF respectively. That gives larger households an option to stay within the same connected platform rather than accepting a 50-gallon tank simply for its smart features.

Read the manufacturer’s Voltex AL Smart Hybrid Electric Heat Pump documentation before finalizing a model. It is the right place to confirm the specific tank’s electrical requirements, first-hour rating, location limits, and supported controls.

Who it is for: Homeowners whose utility offers time-of-use pricing or demand-response options and who want a heat pump water heater with both app controls and explicitly documented CTA-2045 and OpenADR capabilities.

Verify before buying: Whether your utility accepts the unit’s communication method for enrollment, which HPTS capacity fits your household, and whether your electrical panel and installation location meet the selected model’s requirements.

Bradford White AeroTherm with Connect: Best contractor-channel option

Bradford White Connect is an optional adapter for compatible Bradford White AeroTherm heat pump water heaters. It is a practical option for shoppers who are already working with a plumbing or HVAC contractor that sells and installs AeroTherm equipment.

With the adapter and app, Bradford White describes mobile temperature control, daily or weekly scheduling, energy tracking, and error alerts. The adapter also conforms to CTA-2045 requirements for utility demand-response programs, providing a more meaningful grid-readiness story than app access alone.

The important distinction is that Bradford White Connect is optional. Do not assume an AeroTherm quote includes it. Ask the contractor to list the adapter separately, confirm that it is compatible with the exact tank being proposed, and explain how it would connect to any available local utility program.

This recommendation is less about choosing a tank by a single published specification and more about choosing an installer-supported system. The available research does not establish a complete current AeroTherm model matrix or whether the adapter is bundled with every current configuration.

Who it is for: Homeowners purchasing through a contractor who want AeroTherm installation support plus optional scheduling, monitoring, alerts, and CTA-2045-compatible demand-response hardware.

Verify before buying: The exact AeroTherm model number, whether Bradford White Connect is included or separate, the installed cost of the adapter, and the installer’s plan for demand-response enrollment if your utility offers one.

A. O. Smith Voltex X Split Heat Pump Residential Water Heater: Best split-system option

The A. O. Smith Voltex X Split Heat Pump Residential Water Heater takes a different approach from an integrated heat pump water heater. Its heat-pump equipment is located outdoors, while the product documentation identifies a 50-gallon lowboy tank. That layout can be worth considering when an indoor utility room does not have appropriate space, air volume, noise tolerance, or temperature conditions for an all-in-one unit.

Voltex X uses the iCOMM app and adds features including guest mode, leak alerts, demand-response and time-of-use functions, and optional automatic water shutoff. Its split design may create placement advantages, but it also makes installation planning more specialized. The outdoor unit location, line routing, access for service, condensate handling, and local weather exposure all need professional review.

A split system is not automatically easier to install than a standard heat pump water heater. It simply moves some of the installation questions outdoors. It may be a better fit for one house and a poor fit for another.

Who it is for: Homeowners who want connected controls and utility-oriented features but need or prefer an outdoor heat-pump layout rather than an integrated indoor tank.

Verify before buying: Outdoor siting rules, equipment clearances, line-set routing, cold-weather operating considerations, service access, tank placement, and whether the optional shutoff feature is included in the proposed installation.

What to check before buying a smart hybrid water heater

Choose capacity by peak demand, not household size alone

A 50-gallon tank may work well for some households, while others need 65 or 80 gallons. Count the times when demand overlaps: back-to-back showers, a large soaking tub, laundry, dishwasher cycles, and guests can all raise peak use. First-hour rating is especially important because it estimates how much hot water a unit can deliver in its first hour of operation.

If your home has high morning demand, a smaller tank with a lower first-hour rating may create more compromises than its price or footprint suggests. Ask for the exact model’s first-hour rating rather than relying on broad product-family claims.

Confirm electrical capacity before you shop

Many heat pump water heaters use a 208/240-volt circuit and 30-amp service. Some lower-amperage products are available where panel capacity is tighter, but the tradeoff can be reduced first-hour delivery. A 120-volt plug-in option, where available in a manufacturer’s range, is not interchangeable with a conventional 240-volt installation; compare its output and recovery performance carefully.

Have a qualified installer evaluate your electrical panel, circuit capacity, disconnect requirements, and local code obligations. Do this before assuming that a particular smart feature makes one model the easy choice.

Plan for noise, airflow, condensate, and temperature

Integrated heat pump water heaters pull heat from surrounding air, which can cool and dehumidify the room. That can be welcome in some spaces and undesirable in others. The selected unit may require minimum room volume, clearances, a condensate drain, or ducting under certain conditions.

Ask the installer to check ambient-temperature limits and whether the location is likely to become too cold, too hot, or too confined. A garage, basement, mechanical room, and closet can produce very different results.

Confirm utility-program compatibility in writing

For a demand-response water heater, verify four things with the program administrator: whether enrollment is open, which exact model numbers qualify, whether a CTA-2045 module or other device is required, and what control events may do to water-heating operation. Ask whether you can override an event if your household needs more hot water.

Also check whether the program requires Wi-Fi, a separate gateway, a participating installer, or an aggregator. Do not count expected incentive payments, rebates, or rate savings until you confirm current terms in your ZIP code.

Smart heat pump water heater FAQs

Is Wi-Fi control the same as demand-response capability?

No. Wi-Fi can provide remote temperature adjustments, alerts, schedules, and usage information. Demand response requires an approved way for a utility or authorized provider to communicate with the equipment. CTA-2045 and OpenADR documentation are more relevant to that use case than Wi-Fi alone.

Can a heat pump water heater work with time-of-use electricity rates?

Potentially. A model with scheduling or time-of-use functions can be set to favor heating during lower-cost periods, provided its stored hot water and recovery capacity fit your needs. Review your actual utility rate windows and avoid schedules that leave your household short on hot water during predictable peak-use times.

Do smart heat pump water heaters need a 240-volt, 30-amp circuit?

Many do, but not all. Some product lines include lower-amperage configurations, and some manufacturers offer 120-volt plug-in models. The correct answer depends on the exact model, not the product family name. Check the manufacturer installation instructions and have an installer assess your existing electrical service.

Are utility demand-response programs available everywhere?

No. Programs vary by utility territory and can change over time. Even a CTA-2045 water heater may not be eligible if your utility has no active program, requires a particular device, or supports only selected models.

Which smart heat pump water heater is right for me?

Start with installation feasibility and hot-water demand. Choose Rheem Professional Prestige ProTerra if you want broad capacity choices and built-in EcoNet controls; choose A. O. Smith Voltex AL if documented CTA-2045 and OpenADR support are central to your decision; consider Bradford White AeroTherm with Connect when a contractor quote fits your project; and consider Voltex X when an outdoor split-system layout solves an installation problem.

In every case, confirm the exact model, local utility compatibility, circuit requirements, and first-hour rating before signing an installation contract.

Useful references: Heat Pump Water Heater Design Considerations · Heat Pump Water Heater Technical Guide