Tankless Water Heater Kwh Per Year

64 energy factor 0 92 electric 0 61 gas energy cost 0 06 per kwh 60 per therm.

Tankless water heater kwh per year. To heat this water they spend around 400 600 per year. 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. 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.

With the promise of endless hot water over 9 million electric tankless water heaters are sold in the united states every year. Consumer reports tested a batch of tankless water heaters to see if they work as well and efficiently as storage tank water heaters. 365 days year x 12 03 kwh day ef x fuel cost kwh annual cost of operation. 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.

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. Hours used per day. 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. Based on an average electricity rate of 0 132 per kwh.

Tankless water heaters pros. Typical electric resistance tankless water heaters have energy factors that range from 0 96 to 0 99. 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.

A heat pump water heater with an ef of 2 0 and an electricity cost of 0 0842 kwh. As per estimation by energy gov average water use per day per household is about 64 gallons. The comparison assumes a storage tank water heater as the input type. Average daily usage gallons per day gallons.

365 x 12 03 2 0 x 0 0842 185. You need to know or convert the unit cost of electricity by kilowatt hour kwh. Compact tankless water heaters are small and compact. A typical water heater will use around 4000 watts.

Let s say you spend 2 000 to purchase and install a tankless water heater. For electric water heaters including heat pump units. Calculating energy usage an average water heater runs three hours daily.