Energize CT Water Heater Replacement Calculator

This calculator provides estimated annual and 10-year operating costs for different water heater types, based on local energy rates and equipment efficiency.

You can adjust the number of household members to see the estimated operating costs for a hot water heater in your home.
Temperature rise is the difference between the incoming cold-water temperature and the temperature your water heater must reach for hot water use. A greater temperature rise requires more energy, which increases operating costs.

I am a customer of one of the Energize CT Sponsors.				Estimated Usage: gallons per day Temperature Rise °F:

	Energy Unit	Cost/Unit	Annual Cost	10-yr Cost
Electric tank	kWh	$	$	$
Heat pump water heater	kWh	$	$	$
Natural gas instantaneous	therm	$	$	$
Natural gas storage tank	therm	$	$	$
Oil boiler w/indirect tank	gal	$	$	$
Oil boiler w/tankless coil	gal	$	$	$
Propane (LP) instantaneous	gal	$	$	$
Propane (LP) storage tank	gal	$	$	$

Disclaimer

Default energy prices last updated: 08/05/2026.

We are Energize Connecticut

An initiative of the Energy Efficiency Fund, the Connecticut Green
Bank, the State, and your local electric and gas utilities with
funding from a charge on customer energy bills.