Tankless Water Heater Kwh Per Year

You need to know or convert the unit cost of electricity by kilowatt hour kwh.

Tankless water heater kwh per year. 64 energy factor 0 92 electric 0 61 gas energy cost 0 06 per kwh 60 per therm. But before you replace your existing electric water heater with one you should look at the one time installation costs annual maintenance and the monthly cost of electricity. The efficiency of tankless water heater over storage type heaters is 24 34. For electric water heaters including heat pump units.

365 days year x 12 03 kwh day ef x fuel cost kwh annual cost of operation. The comparison assumes a storage tank water heater as the input type. Tankless water heaters pros. Typical electric resistance tankless water heaters have energy factors that range from 0 96 to 0 99.

Typically a hot water heater that uses a tank will run for three to five hours per day. Quantity of water heaters to be purchased unit s 1 unit see assumptions for various daily water use totals. Click calculate to find the energy consumption of a water heater using 4000 watts for 3 hours a day 0 10 per kwh. With the promise of endless hot water over 9 million electric tankless water heaters are sold in the united states every year.

As per estimation by energy gov average water use per day per household is about 64 gallons. Calculating energy usage an average water heater runs three hours daily. Hours used per day. If your annual savings are 100 it would take 20 years the approximate lifespan of a tankless water heater to recoup the cost in energy savings.

Enter how many hours the device is being used on average per day if the power consumption is lower than 1 hour per day enter as a decimal. To heat this water they spend around 400 600 per year. Average daily usage gallons per day gallons. Using the doe test procedure for calculations an electric resistance tankless water heater with an energy factor of 0 99 would consume 4 435 kilowatt hours per year.

A heat pump water heater with an ef of 2 0 and an electricity cost of 0 0842 kwh. Let s say you spend 2 000 to purchase and install a tankless water heater. 365 x 12 03 2 0 x 0 0842 185. Consumer reports tested a batch of tankless water heaters to see if they work as well and efficiently as storage tank water heaters.

A typical water heater will use around 4000 watts. By using tankless water heater you can save 96 200 per year based on usage types and capacity of the. Compact tankless water heaters are small and compact.