Water Heater Energy Factor List

It s important to note that energy factors can vary significantly depending on their fuel source. 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. 365 x 12 03 2 0 x 0 0842 185.

water flow indicator switch water testing labs in danbury ct wayfair bedside tables white gloss water heaters for sale in jamaica waterproof outdoor dartboard cabinet water heater thermostat setting water fountain for home vastu water based resins coatings

Water Heaters Get A New Performance Standard Greenbuildingadvisor

Uef

Water Heater First Hour Rating Explained Best Water Heater Reviews

Getting The Right Binformation On Uef Phcppros

Business Energy Advisor Tankless Water Heaters

Appliance Rebates

An older measure of water heater overall efficiency that is being phased out due to new test methods for water heaters.

Water heater energy factor list.

For gas condensing water heaters the energy factor must be 0 8 or higher to qualify for the energy star label. A heat pump water heater with an ef of 2 0 and an electricity cost of 0 0842 kwh. Define consistent standards for measuring energy efficiency performance. Electric water heaters typically have energy factors between 0 75 and 0 95.

You need to know or convert the unit cost of electricity by kilowatt hour kwh. The typical energy factor for a gas water heater is between 0 5 and 0 7. Expressed as a decimal the uniform energy factor is determined by running a department of energy specified simulated use test sut. The new uef rating method improves the industry s ability to.

365 days year x 12 03 kwh day ef x fuel cost kwh annual cost of operation. This means that between 75 and 95 percent of the energy used to heat the water ends up being delivered to your taps as usable hot water. Ef is determined by the department of energy s test method outlined in the 10 cfr parts 200 to 499 edition revised as of january 1 2014. The uniform energy factor for residential and certain commercial water heaters refers to its efficiency when run under standardized conditions for a 24 hour period.

Simplify the water heater selection. As of september 1 2010 a water heater needs to have an energy factor of 0 67 or higher in order to qualify for the energy star label. The uniform energy factor. The higher the ef value is the more efficient the water heater.