What is uniform energy factor for hot water heaters?

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. Expressed as a decimal, the Uniform Energy Factor is determined by running a Department of Energy specified simulated use test (SUT).

Uniform energy factor Definition | Law Insider

For instantaneous-type water heater basic models tested for uniform energy factor and rated pursuant to 10 CFR 429.17(a)(1) or 10 CFR 429.17(a)(2)(i) through (ii): Uniform energy factor, rated storage volume (gal), maximum gallons per minute, and recovery efficiency (percent). 3.. For instantaneous-type water heater basic models: Uniform energy factor, rated storage …

Quickfacts | NPE-240S | Products | Navien Inc.

Energy star certified Yes. Efficiency Ratings* Uniform Energy Factor (UEF) 0.97 MAX GPM (67°F Rise) 5.7 GPM (21.6 l/m) Annual Energy Consumption* (Residential) Natural gas (Therms/Year) 175.0 Propane (Gallons/Year) 192 gal (726.8 l) …

Quickfacts | NPE-240S2 | Products | Navien Inc.

Uniform Energy Factor (UEF) 0.96 MAX GPM (67°F Rise) 5.8 GPM (22 l/m) Annual Energy Consumption* (Residential) Natural gas (Therms/Year) 177.0 Propane (Gallons/Year) 194 gal (734.4 l) Natural Gas Estimated Operating Cost** $193 Propane Estimated Operating Cost** $468

Department of Energy's Uniform Energy Factor Test Procedure

• Reflect energy efficiency during a representative average use cycle • Not be overly burdensome to conduct • On July 11, 2014, DOE published a test procedure final rule in the Federal Register. 79 FR 40541. • Addressed AEMTCA requirements for establishing UED • Established Uniform Energy Factor (UEF) metric

Is higher or lower UEF better? - AskingLot.com

Uniform Energy Factor (UEF) is a new metric for determining the energy efficiency of a water heater. When selecting the most efficient unit for you, consider the fuel type and the capacity needs for your home. It's important to remember – the higher the UEF, the higher the efficiency and the lower the energy bill.

What does UEF stand for?

The Uniform Energy Factor (UEF) is the DOE's newly developed metric for communicating the energy efficiency of water heaters. A higher UEF means a water heater is more energy efficient and will cost less to operate compared to …

NRC66 OD | Noritz

89 Uniform Energy Factor Minimum 15,000 to Max 120,000 BTUh 0.5 to 6.

Uniform Energy Factor Explained | Water Heater Hub

What Is Uniform Energy Factor? Uniform Energy Factor, better known as UEF, is a metric developed by the Department of Energy, the United States of India. The metric is designed to let the user see the energy efficiency of water heaters. Each water heater model will have a unique UEF rating, indicating the energy efficiency while heating water.

UEF Replaces EF | American Water Heaters

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. UEF ratings are determined by assigning water heaters into one of four different categories of hot water usage and then ...

Tankless Condensing High Efficiency Water Heaters with ...

ENERGY STAR® qualified, has a minimum uniform energy factor of 0.93, meets the energy efficiency requirements of the U. S. Department of Energy and ASHRAE 90.1 and complies with SCAQMD Rule 1146.2 and other air quality districts with similar requirements for low NOx emissions of 14 ng/J or 20 ppm.

Solar Uniform Energy Factor Specification - Solar Rating ...

The Solar Uniform Energy Factor (SUEF) Specification for domestic solar water heaters was created in late 2020 by a diverse group of stakeholders from the solar thermal industry. The specification defines the conditions, assumptions, and methodologies to be used to determine a Uniform Energy Factor for domestic water heaters directly utilizing solar energy.

What is the Uniform Energy Factor of my water heater ...

Uniform Energy Factor or UEF is the standard measure of a water heater's overall efficiency. Basically, the higher the UEF rating, the more efficient the water heater. (The former measurement EF is no longer used and cannot be directly compared to UEF. It's not apples to apples).

Solar Uniform Energy Factor | SunEarth

The Solar Uniform Energy Factor (SUEF) Specification for domestic solar water heaters was created in late 2020 by a diverse group of stakeholders from the solar thermal industry. The specification defines the conditions, assumptions, and methodologies to be used to determine a Uniform Energy Factor for domestic water heaters directly utilizing ...

Uniform Energy Factor (UEF) For Water Heaters | A. O. Smith

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.

10 CFR Appendix E to Subpart B of Part 430 - Uniform Test ...

UEF = the uniform energy factor as computed in accordance with section 6.4.3 of this appendix 365 = the number of days in a year. V = the volume of hot water drawn during the applicable draw pattern, gallons = 10 for the very-small-usage draw pattern

Water Heaters Get a New Performance Standard ...

The Department of Energy has updated its testing and labeling standards for residential water heaters, replacing Energy Factor (EF) with a new metric called the Uniform Energy Factor (UEF). Manufacturers say there's nothing different about their water heaters, only the way the government requires performance data to be collected and reported. Consumers …

Understanding Energy Efficiency in Water Heaters - Ruud

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). The new UEF rating method improves the industry's ability to: Define consistent standards for measuring energy efficiency performance Simplify the water heater selection process

A.O. Smith Signature 300 40-Gallon Tall 40000-BTU Natural ...

This model is ENERGY STAR® certified and operates at a 0.64 Uniform Energy Factor (UEF) which can reduce your energy consumption compared to less efficient models. Not sure if this is the right water heater for you? Use our product selector tool to see if this model is the right fit for your hot water needs.

UEF and How it Impacts Your Water Heater | Rinnai

The Department of Energy (DOE) is responsible for defining and implementing energy conservation standards and testing procedures for various equipment and appliances, including water heaters. Recently the DOE has introduced a new metric for communicating the energy efficiency of residential water heaters called the Uniform Energy Factor (UEF), …

What is UEF water heater rating? - AskingLot.com

The Uniform Energy Factor (UEF) is the DOE's newly developed metric for communicating the energy efficiency of water heaters. UEF ratings are determined by assigning water heaters into one of four different categories of hot water usage and then evaluating their performance based on that usage. Click to see full answer.

Water Heater Energy Factor: Is Higher Better in Oklahoma?

Water Heater Energy Factor: Why Higher Does Not Mean Better in Oklahoma. August 27, 2014. Energy factor (EF) rating is like the Miles Per Gallon (MPG) of water heaters. It determines how efficiently the water heater uses its fuel source. For example, these are the typical EFs of gas and electric water heaters: Electric water heaters: 0.75 to 0.95.

SOLAR UNIFORM ENERGY FACTOR PROCEDURE FOR …

energy with other water heating fuels and technol-ogies. 1.2. This specification defines the conditions, assump-tions, methodologies and metrics for the determi-nation of Uniform Energy Factor for water heaters directly utilizing solar energy. It does not establish minimum safety and durability requirements, addressed by the ICC 900/SRCC 300 ...

Residential Rebates | SoCalGas

ENERGY STAR Certified Natural Gas Tankless Water Heaters. $1000 - Uniform Energy Factor (UEF) of .95 or higher. $800 - Uniform Energy Factor (UEF) of .87-.94. $600 - Uniform Energy Factor (UEF) of .82 - .86. List of qualifying products - Limit one rebate per .

Water Heater Energy Factor - plumbing

Therefore, energy efficiency of a water heater is measured by its energy factor. This number, shown on the Energy Guide label, shows the unit's overall operating costs, taking into account the burner and heat exchanger efficiencies, as well as heat losses from the water tank.

What is a Water Heater's Energy Factor? | San Francisco ...

Gas-powered water heaters typically have an energy factor between 0.5 and 0.7. One good way to determine whether or not a water heater is energy-efficient is to look for the Energy Star label. 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.

ENERGY STAR® Qualified Water Heaters | A. O. Smith

Each A. O. Smith water heater model listed is a natural gas, propane, or oil water heater that has a Uniform Energy Factor of at least 0.82 or has a thermal efficiency of at least 90%. Accordingly, each is Qualified Energy Property and, when placed into service on or after January 1, 2017 and on or before December 31, 2021, each qualifies for ...

Federal Tax Credit Information - Rheem - Rheem ...

Uniform Energy Factor (UEF) >=0.82. The tax credit is for $300. 1/1/2018 through 12/31/2021. Go to: Residential Water Heaters or Commercial Water Heaters and select Yes for Tax Credit Eligible under Advanced Search. Residential Electric Heat Pump Water Heater. Uniform Energy Factor (UEF) >= 2.2. The tax credit is for $300. 1/1/2018 through 12 ...

UEF Replaces EF - State Water Heaters

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. UEF ratings are determined by assigning water heaters into one of four different categories of hot water usage and then ...

EZTR40 | Noritz

EZTR40 BUNDLE NRC663-FSV .87 Uniform Energy Factor Minumum 15,000 to Max 120,000 BTUh 0.5 to 6.

Uniform Energy Factor for Residential & Commercial …

The Uniform Energy Factor 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. Expressed as a decimal, the Uniform Energy Factor is determined by running a Department of Energy specified simulated use test (SUT).

Finding UEF Values HTP Website: Selection Guide

Save Energy - Save Money Energy Efficiency The more efficient your water heater is, the less money it be higher than a conventional model, the upfront cost will be more than recovered over the lifetime of the unit in lower monthly energy bills. Uniform Energy Factor (UEF) is a new metric for determining the energy efficiency of a water heater.