Tankless Water Heater Kwh Per Year

A typical water heater will use around 4000 watts.

Tankless water heater kwh per year.

A heat pump water heater with an ef of 2 0 and an electricity cost of 0 0842 kwh. The efficiency of tankless water heater over storage type heaters is 24 34. Tankless water heaters pros. To heat this water they spend around 400 600 per year.

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. Hours used per day. You need to know or convert the unit cost of electricity by kilowatt hour kwh. Typical electric resistance tankless water heaters have energy factors that range from 0 96 to 0 99.

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. 64 energy factor 0 92 electric 0 61 gas energy cost 0 06 per kwh 60 per therm. Let s say you spend 2 000 to purchase and install a tankless water heater. Consumer reports tested a batch of tankless water heaters to see if they work as well and efficiently as storage tank water heaters.

Typically a hot water heater that uses a tank will run for three to five hours per day. By using tankless water heater you can save 96 200 per year based on usage types and capacity of the. Click calculate to find the energy consumption of a water heater using 4000 watts for 3 hours a day 0 10 per kwh. 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. Calculating energy usage an average water heater runs three hours daily. 365 x 12 03 2 0 x 0 0842 185. 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. 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. As per estimation by energy gov average water use per day per household is about 64 gallons.

365 days year x 12 03 kwh day ef x fuel cost kwh annual cost of operation. For electric water heaters including heat pump units. Based on an average electricity rate of 0 132 per kwh.