Best Water Heater Heat Pumps for Efficient Home Hot Water
Looking for an energy-saving way to heat water at home? Water heater heat pumps (also called hybrid water heaters) use ambient air to heat your water, cutting energy use and lowering utility bills. This guide highlights five top options, who they’re best for, and practical buying tips to help you choose.
Product Quick Compare
| Product | Best For | Highlights |
|---|---|---|
| Rheem 50 Gal. Smart High Efficiency Hybrid Heat Pump Water Heater | Families seeking a larger capacity with smart controls | 10-year warranty, hybrid efficiency |
| Watts Heat H2O Hot Water Recirculation System | Homeowners wanting instant hot water at fixtures | Programmable timer, easy DIY, saves water |
| Rinnai REHP80 Electric Heat Pump Water Heater 80 Gal | High-demand households needing lots of hot water | Energy Star, high first-hour delivery |
| APCOM UT1 Automatic Recirculation Pump | Under-sink retrofits to cut wait time | Fully automatic, energy-efficient |
| VERIWIS Instant Hot Water Recirculation Pump Kit | DIY installers wanting a complete kit | Thermal bypass, quick install, timer |
Rheem 50 Gal. Smart High Efficiency Hybrid Water Heater
The Rheem hybrid model is best for households that need substantial hot water and value smart connectivity. It must be wired into a dedicated electrical circuit, similar to large electric appliances, and is not a plug-in unit. This is ideal for homes that prioritize energy efficiency and remote monitoring via smart features. Potential buyers should plan for professional electrical installation. Best for larger families or homes with high hot-water demand. A limitation is the need for proper electrical wiring, which may add installation complexity.
Watts Heat H2O Hot Water Recirculation System
This system is best for homeowners who want instant hot water at any faucet without running the tap. It uses thermal bypass technology and a programmable timer to deliver hot water within seconds at fixtures. It’s especially suitable for 120V DIY installations and does not require a return line under the sink. A potential limitation is that it is not designed for tankless water heaters, so verify compatibility with your tank system.
Rinnai REHP80 Electric Heat Pump Water Heater
Best for households with high hot-water needs, this 80-gallon electric heat pump model offers a high first-hour delivery (up to 91 gallons). It’s Energy Star certified with a high Uniform Energy Factor of 4.00, helping to reduce energy costs. It also offers demand-response capabilities to coordinate with local utilities for peak-hour savings. The unit may require a larger electrical service and floor space suitable for 80 gallons. It’s ideal for larger families or homes with substantial daily hot-water usage.
AO Smith UT1 Automatic Hot Water Recirculation Pump
This under-sink recirculation pump is best for retrofits where hot-water waits at fixtures are unacceptable. It features fully automatic operation with a built-in thermostat and timer to conserve water. The pump typically runs three to four times per hour for one to two minutes. It’s a strong choice for households aiming to reduce water waste without extensive plumbing changes, though it requires under-sink installation space and basic electrical access.
VERIWIS Instant Hot Water Recirculation Pump Kit
This kit is best for DIY installers seeking a complete solution with a 304 stainless steel adjustable sensor valve and a programmable timer. It delivers hot water within seconds using thermal bypass technology and includes all mounting hardware for a straightforward installation. The kit is well-suited for standard tank water heaters. A potential limitation is that performance depends on proper valve setup and timer programming.
Buying Guide
What type of system fits my home?
Hybrid heat pump water heaters combine a storage tank with a heat pump to increase efficiency. Recirculation pumps improve hot-water delivery at fixtures without changing the main heater. For homes with space constraints, under-sink recirculation options offer targeted benefits without bulky changes.
What should I consider about installation?
Some heat pump water heaters require dedicated electrical circuits and professional wiring. Recirculation pumps often install under sinks or near existing fixtures and may need basic plumbing skills. Always check space, ventilation, and electrical service requirements before purchasing.
How important is energy efficiency?
Energy Star certification and high first-hour delivery matter for annual operating costs. A higher UEF or first-hour rating usually translates to lower energy use and quicker hot-water delivery, especially in larger households.
Which features matter most?
- Smart controls and integration with home systems
- Timer-based operation to align with daily routines
- Compatibility with existing tank or tankless setups
- Warranty length and service availability
Safety and reliability considerations
Electrical requirements, venting needs (for indoor installation), and proper drainage are essential. Look for models with durable valves, reliable thermostats, and clear installation instructions to minimize maintenance challenges.
FAQ
Do heat pump water heaters require special electrical wiring?
Yes. Many models need a dedicated circuit similar to other large appliances. Consult a licensed electrician for proper wiring and clearance.
Can recirculation pumps work with any water heater?
Most work with standard tank-type water heaters; check compatibility with tank type and pipe layout before installation.
Is a higher first-hour delivery always better?
Higher first-hour delivery helps with quick initial hot-water availability, especially in busy households, but overall energy use and fit to your home should guide choice.
Are these systems easier to install for DIYers?
Recirculation kits often offer DIY-friendly installation, while heat pump water heaters usually require professional installation due to electrical and clearance requirements.
Do these systems save water and money?
Yes, by reducing water waste and improving heating efficiency. Savings depend on usage patterns, climate, and system type.