What is uniform energy factor for hot water heaters?
What is uniform energy factor for hot water heaters?
Uniform Energy Factor (UEF) rating In general, ENERGY STAR certified conventional gas and electric water heaters have UEF ratings between 0.65 and 0.95 — or 65 to 95 cents on the dollar — while hybrid electric heat pump water heaters have much higher UEF ratings of 2.75 to 3.5.
What is the efficiency of a Rheem water heater?
The XR90 has an energy efficiency of . 70, which exceeds Energy Star Phase II requirements. Rheem also offers a 50 gallon energy efficient gas tank water heater with a . 67 energy factor, again qualifying it for the Energy Trust incentive.
What is the UEF on Rheem water heater?
Uniform Energy Factor (UEF): The newest measure of water heater overall efficiency. The higher the UEF value is, the more efficient the water heater.
What is the UEF of a tankless water heater?
A tankless water heater is assigned a UEF within its bin based upon its gallon per minute flow rate. A higher UEF means a water heater is more energy efficient and will cost less to operate compared to other water heaters in the same bin. A water heater’s UEF can only be compared with water heaters within the same bin.
What is a good energy rating for a hot water heater?
Look for the “thermal efficiency” rating rather than EF, with values of 0.90 and above. The minimum efficiency of electric resistance storage water heaters is about 0.90 (depending on tank volume), and the best available are 0.95 EF.
What is the most energy-efficient hot water heater?
Solar Water Heater
Solar Water Heater Uses renewable energy: Solar water heaters are the most energy-efficient water heater options available today.
What is the difference between EF and UEF?
The Uniform Energy Factor (UEF) is the DOE’s newly developed metric for communicating the energy efficiency of water heaters. Previously, you may have seen efficiency measured by Energy Factor (EF). UEF replaces this metric.
What is the energy factor of a tankless water heater?
Tankless water heaters have a . 80 – . 99 energy factor. You will greatly reduce your heat loss when you convert to tankless, and use less fuel to heat the same volume of water.
What is the energy factor of an electric water heater?
The higher the energy factor number, the higher the energy efficiency of the water heater. Electric water heaters have an average energy factor between . 75 and . 95, while gas water heaters range between .
What is the most energy efficient hot water system?
Heat pumps are one of the most energy-efficient hot water solutions. While they need electricity to run, they are said to be roughly three times more efficient than traditional electric water heaters.
Does hot water heater use a lot of electricity?
But your hot water heater uses a lot of energy. Water heating systems are the second biggest user of electricity in your home. This is on average 18% of your electricity costs, according to the U.S. Department of Energy.