Tankless Water Heater Kwh Per Year

Quantity of water heaters to be purchased unit s 1 unit see assumptions for various daily water use totals.

Tankless water heater kwh per year.

So a 4 000 watt heater used for three hours a day at 10 per kwh will cost 1 20 per day about 36 50 per month or 438 per year. Compact tankless water heaters are small and compact. Calculating energy usage an average water heater runs three hours daily. 365 x 12 03 2 0 x 0 0842 185.

Hours used per day. Average daily usage gallons per day gallons. A 50 gallon 5 500 watt water heater with a 90 ef and an electricity rate of 16 per kilowatt hour will cost 781 to. Typical electric resistance tankless water heaters have energy factors that range from 0 96 to 0 99.

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. The comparison assumes a storage tank water heater as the input type. As per estimation by energy gov average water use per day per household is about 64 gallons. Click calculate to find the energy consumption of a water heater using 4000 watts for 3 hours a day 0 10 per kwh.

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. To heat this water they spend around 400 600 per year. Based on an average electricity rate of 0 132 per kwh. A heat pump water heater with an ef of 2 0 and an electricity cost of 0 0842 kwh.

Typically a hot water heater that uses a tank will run for three to five hours per day. 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. A typical water heater will use around 4000 watts. 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.

The efficiency of tankless water heater over storage type heaters is 24 34. By using tankless water heater you can save 96 200 per year based on usage types and capacity of the. 365 days year x 12 03 kwh day ef x fuel cost kwh annual cost of operation. 64 energy factor 0 92 electric 0 61 gas energy cost 0 06 per kwh 60 per therm.

With the promise of endless hot water over 9 million electric tankless water heaters are sold in the united states every year. For electric water heaters including heat pump units. You need to know or convert the unit cost of electricity by kilowatt hour kwh.