Tankless Water Heater Efficiency Factor

Tankless water heaters heat water directly without the use of a storage tank.

Tankless water heater efficiency factor.

This is a savings of 8 7 in. Traditional water heaters that are more than 15 years old are likely to be much less efficient than new ones. When a hot water tap is turned on cold water travels through a pipe into the unit. Typical electric resistance tankless water heaters have energy factors that range from 0 96 to 0 99.

Either a gas burner or an electric element heats the water. Simplify the water heater selection. Npe series condensing tankless water heaters. New water heaters and efficiency.

The new uef rating method improves the industry s ability to. 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. This includes the following. A tank type water heater has a useful life of about 10 to 15 years and the unit s efficiency is going to decline with time.

The energy factor ef indicates a water heater s overall energy efficiency based on the amount of hot water produced per unit of fuel consumed over a typical day. You don t need to wait for a storage tank to. Products must meet minimum requirements for energy efficiency hot water delivery warranty period and safety. As a result tankless water heaters deliver a constant supply of hot water.

Beginning june 12 2017 ef ratings will be replaced with the new industry standard for measuring energy efficiency in water heaters called uniform energy factor uef. Define consistent standards for measuring energy efficiency performance. Navien premium efficiency condensing tankless water heaters are the 1 selling high efficiency condensing tankless water heaters in north america the npe series offers industry leading efficiency up to 0 97 uef to keep your utility bills low endless hot water so you never have a cold shower and exclusive comfortflow technology with built in. Use the energy factor to determine the energy efficiency of a storage tankless or demand type water heater or heat pump water heater.

Going with the noritz nr662 od ng tankless water heater means that you have a thermal efficiency of 84 and energy factor 0 81.