Hot Water List
Menu

Cala Systems, Inc RDH6524M1

Cala Systems, Inc RDH6524M1 is in the ENERGY STAR list as of Oct 26, 2026.

It has a certified storage volume of 65 gallons, a certified UEF of 3.61, and a certified first-hour rating of 79 gallons of hot water.

  • Heat pump water heater
  • 1 listed model

No certified figures were found under this model number. Units made for another brand are often certified under that brand's basic model.

Storage volume
65gallons
UEF
3.61Uniform energy factor
First-hour rating
79gallonsHot water in the first hour
See it among every heat pump model

Product history

Cala Systems, Inc RDH6524M1 has a recorded ENERGY STAR market-availability date of Sep 2, 2025. It first appeared in the ENERGY STAR list between June 2025 and October 2025.

ENERGY STAR certified models

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiency
RDH6524M1653.6179420%

Starting full, it gives 79 gallons of hot water in its first hour of use. Reheating lets it give 14 gallons beyond the 65 gallons in its tank. Among 481 heat pump models, 165 have a higher first-hour rating. The median heat pump model gives 72 gallons in its first hour.

Its single model number, RDH6524M1, is ENERGY STAR certified. In the test, it gives 3.61 units of hot water energy per unit it uses (its UEF). Pulling heat from the air lets its UEF pass 1. Its test ran at the high level of daily hot water use. Of 237 heat pump models with the same draw pattern, 160 have a higher UEF. For its type and draw pattern, the UEF runs from 2.85 to 4.95. Its recovery efficiency is 420%, because it takes heat from the air as it reheats water.

It may qualify for 16 rebate programs. Another 6 rebate programs may accept it if it meets their other terms.

Rebates

ProgramStateStatusProgram page
Efficiency Arizona AZ May qualify Its own page
SRP Heat pump water heater rebate AZ May qualify Its own page
CleanPowerSF Electrify Your Home bill credits CA May qualify Its own page
Los Angeles Department of Water and Power Consumer Rebate Program CA May qualify if it meets the other terms Its own page
SVCE Home Rebates CA May qualify if it meets the other terms Its own page
TECH Clean California HEEHRA Phase I CA May qualify Its own page
Colorado Springs Utilities Water heater rebate (heat pump) CO May qualify Its own page
Delaware Electric Cooperative Heat Pump Water Heating Rebate DE May qualify Its own page
Hawai‘i State Energy Office eHale Energy Saver Rebate Program HI May qualify Its own page
Ameren Illinois Instant Incentives IL May qualify Its own page
DTE Energy Water Heaters (heat pump) MI May qualify Its own page
Entergy Mississippi Residential Appliances Program MS May qualify Its own page
NC DEQ Energy Saver North Carolina NC May qualify Its own page
NHSaves Heat Pump Water Heater NH May qualify if it meets the other terms Its own page
PNM Home Energy Checkup Rebates NM May qualify Its own page
PECO Appliance Rebates PA May qualify Its own page
Rhode Island Energy Heat Pump Water Heater Rebate RI May qualify if it meets the other terms Its own page
TVA EnergyRight TN, AL, MS, KY, GA, NC, VA May qualify Its own page
Dominion Energy Virginia Water Energy Savings Program VA May qualify Its own page
Virginia Energy Home Energy Rebates VA May qualify if it meets the other terms Its own page
Focus on Energy (heat pump) WI May qualify if it meets the other terms Its own page
Focus on Energy Home Electrification and Appliance Rebates WI May qualify Its own page

Programs change their terms. Check the program's own page before you buy.

Updated Oct 26, 2026 · Methodology

Not covered

  • Advertised figures. We have none on file for this model.