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Yearly Cost To Run Portable Hot Water Heaters

These water heaters are compact, portable and lightweight, thus allowing you to carry them around wherever you go. They seldom exceed 10 pounds in weight, they require no venting installation and they involve little to no maintenance in the long haul.
The portable water heaters come with an easy and efficient attachment system that allows you to connect them to any garden hose, quickly and without the hassles. Moreover, most of them come with embedded batteries that can be easily recharged, therefore you do not need to worry about electrical hook-ups that are often dangerous and unreliable; Easy to install and use, these water heaters are designed to provide a continuous flow of warm water whenever and wherever you need it: all you need to do is to connect the heater to a constant water source and to turn it on – the modern heaters come with an automatic on/off button;The modern ones are very energy and water-efficient, meaning that they are designed to provide high-quality warm water while helping you save money on utility and electricity bills at the same time. Hence to understand the yearly cost for these systems to is to basically understand how much it would cost to use the fuel source. Below is an explanation of how the cost works.

For gas and oil water heaters:
You need to know the unit cost of fuel by Btu (British thermal unit) or therm. (1 therm = 100,000 Btu)
365 X 41045 ÷ EF X Fuel Cost (Btu) = estimated annual cost of operation OR 365 X 0.4105 ÷ EF X Fuel Cost (therm) = estimated annual cost of operation

Example: A natural gas water heater with an EF of .57 and a fuel cost of $0.00000619/Btu
365 X 41045/.57 X $0.00000619 = $163

For electric water heaters, including heat pump units:
You need to know or convert the unit cost of electricity by kilowatt-hour (kWh).
365 days/year x 12.03 kWh/day ÷ EF x Fuel Cost ($/kWh) = annual cost of operation

Example: A heat pump water heater with an EF of 2.0 and an electricity cost of $0.0842/kWh
365 X 12.03 ÷ 2.0 X $0.0842 = $185

The energy usage per day in the above equations is based on the DOE test procedure for hot water heaters, which assumes an incoming water temperature of 58°F, hot water temperature of 135°F, and total hot water production of 64.3 gallons per day, which is the average usage for a household size of three people.