Cala Heat Pump Water Heater
$2,999
before rebates and tax incentives
GET UP TO $850 IN REBATES. Calculate yours here.
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Cala Heat Pump Water Heater

 $2,999.00 before rebates and tax incentives

GET UP TO $850 IN REBATES. Calculate yours here.

Most water heaters just react. Cala thinks ahead. Cala optimizes its heating for your family’s unique schedule - learning when you need hot water and using energy only when it makes sense. It integrates seamlessly into your home to deliver comfort, lower energy use, and savings every day. Backed by 10-year parts + 3-year labor warranty

Need a contractor? Click here to get connected with a licensed Cala Pro Contractor.

Cala is currently only available in select areas.
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CALA IN THE NEWS

How Cala Works:

Comfort and control, right in your hand.

With the Cala app, you can see how much hot water you’re using, track your savings, and boost heat when you need it. You can even adjust what Cala prioritizes, like heating when the electric grid is cleanest.

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Why Cala is unlike any water heater you’ve had before.

Cala isn’t just efficient—it’s thoughtful. Every feature is designed to deliver more comfort, save energy and money, and give you better visibility and control. See below to learn the many ways Cala brings comfort and efficiency to your day.

Maximizes Your Hot Water

Cala delivers up to 50% more hot water during periods of high demand by heating to a higher temperature and then mixing with colder water at the outlet.

Lowers Energy Bills

Cala learns your routine and uses advanced controls to heat water at the right time, speed, and temperature - cutting energy costs without sacrificing comfort.

Solar Syncing

Cala maximizes use of electricity from your home solar system, lowering your carbon footprint and, depending on your electricity rates, saving you money.

Lowers Your Carbon Footprint

Cala heats water when the grid is cleanest or solar is strongest, helping you reduce emissions without changing your routine.

Is Cala right for your home?

Cala is designed to work in most homes, but there are a few things to check before you reserve. Here’s how to know if it’s a good fit for your space and setup.

1. SPACE & CLEARANCE
Cala is 24 inches in diameter and 67 inches tall. It needs:

  • 34 inches x 34 inches of floor space (includes 10 inches of air outlet clearance)
  • 77 inches of height clearance (includes 10 inches of air inlet clearance)
  • 700 cubic feet of room volume; rooms below this size may require ducting
  • A flat, indoor location like a basement, garage, or utility room
  • Access to nearby drainage or a condensate pump

2. HOT WATER CAPACITY
Cala’s 65-gallon tank is designed to meet the needs of households with up to 5 people.

3. NOISE & AIR CIRCULATION
Cala produces cool, dry air and runs at 49–52 dBA—similar to the sound of a refrigerator. You can set quiet hours to avoid certain times of day, but Cala will still need to run regularly. It’s best placed in a space where airflow is welcome and occasional noise won’t be disruptive.

4. ELECTRICAL
Cala requires a 240V, 30 amp double pole breaker. If you're replacing an electric water heater, the existing circuit most likely suffices. If you're replacing a fossil fuel water heater, you may need a to add a circuit, which is straightforward in most, but not all, homes. Consult a licensed professional if you're unsure of your setup.

Have questions?

Explore your options for getting Cala installed whether you’d like to work with a Cala Pro Contractor, speak with our team, or handle installation yourself.

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Specifications & Warranty

MODEL INFORMATION
Model
RDH6524M1
Refrigerant
R-513a
Compressor
Variable Speed
Tank
Glass-lined carbon steel
Insulation
2” non-CFC polyurethane
Nominal Dimensions
24" diameter 67" height
Shipping Dimensions
32” x 32” x 72”
Dry (Shipping) Weight
287 lbs
Certifications
ENERGY STAR® Certified
Conforms to UL Standards
60335-1, 60335-2-40, and 174
PERFORMANCE
Tank Capacity
65 Gallons (Nominal)
61 Gallons (Rated)
Compressor Output
1,000W - 1,8000W
Heat Elements
4,500W Upper
4,500W Lower
UEF
3.76
FHR
78 Gallons
Sound *Internal Test results based on NEEA v6.0 Appendix D Test Method at 55Hz
48 dBa
Heat Pump Ambient Operating Range
37-120F
PLUMBING
Water Connections
3/4" Male NPT
Condensate Connection
3/4" Male NPT
Flow Sensor
Integrated
Mixing Valve
Integrated
Leak Detection
Integrated
ELECTRICAL
Power
240V/60Hz/1-Phase
Breaker Size
30A Double Pole
CONNECTIVITY
Connectivity
WiFi, LPWAN, Bluetooth
Smartphone App
iOS and Android
User Interface
On-unit or via Cala app

WARRANTY

  • 10-year warranty on the tank and internal parts
  • 3 years of labor coverage with Cala Pro Contractor installation
  • Fully transferable—Cala’s coverage stays with the home if you move

FREQUENTLY ASKED QUESTIONS

When will Cala be available in my region?

Cala deliveries started in the Northeast. We’ll expand across the U.S. in late 2025 and beyond. To secure your spot at the front of the line in your region, you can place a fully refundable $100 deposit. You can also subscribe for updates to stay informed about the status of your reservation as we expand.

What rebates and tax incentives are available to me?

Cala is eligible for many state and utility rebate programs, though availability and amounts depend on your location and electric utility. Rebate programs vary by region and may change over time, but in some areas, incentives can significantly reduce the cost of installing a heat pump water heater.

To explore your local options, use our rebate finder.

What’s involved with installation?

Your current water heater will be drained and removed and disposed of, then your Cala water heater will be put in its place. Plumbing and electrical connections will be made to your Cala unit and a condensate drainage line will be installed. If you’re replacing a natural gas, oil or propane water heater then installation will usually include the addition of a new 240V circuit and the natural gas, propane or oil lines will be capped. If your Cala unit is being installed in a closet or small space, it may be ducted to a larger space or the door may be changed. Most water heater installations take less than one day.

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