Tankless Water Heater Kwh Per Year

Typically a hot water heater that uses a tank will run for three to five hours per day.

Tankless water heater kwh per year.

For electric water heaters including heat pump units. A typical water heater will use around 4000 watts. With the promise of endless hot water over 9 million electric tankless water heaters are sold in the united states every year. Typical electric resistance tankless water heaters have energy factors that range from 0 96 to 0 99.

Let s say you spend 2 000 to purchase and install a tankless water heater. 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. 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. Hours used per day.

Tankless water heaters pros. Compact tankless water heaters are small and compact. Consumer reports tested a batch of tankless water heaters to see if they work as well and efficiently as storage tank water heaters. Calculating energy usage an average water heater runs three hours daily.

The comparison assumes a storage tank water heater as the input type. 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. The efficiency of tankless water heater over storage type heaters is 24 34. Based on an average electricity rate of 0 132 per kwh.

You need to know or convert the unit cost of electricity by kilowatt hour kwh. 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. Average daily usage gallons per day gallons. Quantity of water heaters to be purchased unit s 1 unit see assumptions for various daily water use totals.

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. 64 energy factor 0 92 electric 0 61 gas energy cost 0 06 per kwh 60 per therm. 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. 365 x 12 03 2 0 x 0 0842 185.

A heat pump water heater with an ef of 2 0 and an electricity cost of 0 0842 kwh. Click calculate to find the energy consumption of a water heater using 4000 watts for 3 hours a day 0 10 per kwh. To heat this water they spend around 400 600 per year.