ENERGY STAR Certified Water Heaters

data.energystar.gov | Last Updated 13 Mar 2018

Certified models meet all ENERGY STAR requirements as listed in the Version 3.2 ENERGY STAR Program Requirements for Water Heaters that are effective April 16, 2015. A detailed listing of key efficiency criteria are available at https://www.energystar.gov/products/water_heaters/residential_water_heaters_key_product_criteria

Tags: water heaters

This dataset has the following 43 columns:

Column NameAPI Column NameData TypeDescriptionSample Values
ENERGY STAR Unique IDpd_idnumberThe ENERGY STAR Unique ID (ESUID) is a string of seven numbers EPA assigns to an ENERGY STAR model or set of models with unique performance characteristics. This ESUID is unique to both the model and product specification version and is assigned by EPA upon receipt of certification information from the certification body. Each row within the product list will have a unique ESUID. Developers may wish to use this ESUID to track information on certified models in their information systems.
ENERGY STAR Partnerenergy_star_partnertextAn organization that signed a Partnership Agreement with EPA to manufacture or private label ENERGY STAR qualified products.
Brand Namebrand_nametextAn identifier assigned by the manufacturer or private labeler to a product or family/series of products for sales and marketing purposes.
Model Namemodel_nametextAn identifier assigned by the manufacturer or private labeler to a product or family/series of products for sales and marketing purposes.
Model Numbermodel_numbertextA distinguishing identifier, usually alphanumeric, assigned to a product by the manufacturer or private labeler.
Additional Model Informationadditional_model_informationtextThis column includes for the qualified model or family, family members, additional model names, model numbers and other identifying information associated with a product or family/series of products for sales and marketing purposes. Other identifying information includes, but is not limited to, SKUs, UPC codes, retail numbers, and/or descriptions of models included/not included in the reported Model Family.
TypetypetextThis field is used to indicate the type of qualified product: Gas Storage Water Heater, Gas Tankless Water Heater, Heat Pump Water Heater, High Capacity Storage, Solar with Gas Backup, or Solar with Electric Backup.
FuelfueltextFuel type refers the kind of fuel the water heater uses to heat the water, either natural gas or propane.
Vent Typevent_typetextThe type of vent used by the water heater: Atmospheric Vent, Direct Vent, or Power Vent.
Storage Volume (gallons)storage_volume_gallonsnumberVolume is the capacity of the tank, in gallons. Storage Volume is not applicable for gas tankless, solar with gas backup, or solar with electric backup water heaters.
Tank Height (inches)tank_height_inchesnumberTank height is the distance from the bottom of the water heater’s tank to the top of its tank.
Height to Vent (inches)height_to_vent_inchesnumberHeight to vent is the distance from the bottom of the water heater’s tank to its vent.
Tank Diameter (inches)tank_diameter_inchesnumberTank diameter is the width or diameter of the water heater’s tank.
Vent Size (inches)vent_size_inchesnumberVent size is the width or diameter of the vent opening.
Vent Size 2 (inches)vent_size_2_inchesnumberVent size 2 is the width or diameter of a second vent opening.
Input (kW)input_kwnumberElectric Input kW refers to the input wattage of the heat pump or supplementary electric elements.
VoltsvoltsnumberVolts refer to the potential of an outlet or circuit to provide electrical energy. The standard current in the typical U.S. home is in the range of 110 to 120 volts. However, circuits used for equipment, such as heat pump water heaters, may use voltage in the range of 220 to 240 volts. These heavy-duty circuits can be identified by their non-standard outlet plugs.
Electric Usage at 125°F outlet temp (kWh/yr)kwh_yr_at_125_f_outlet_tempnumberkWh/year, kilowatt hours per year, refers to the amount of electricity consumed by the water heater according to its Uniform Energy Factor
Input Rate (BTU/hr)input_rate_thousand_btu_per_hournumberInput refers to the burner size of the water heater, in BTU per hour.
Uniform Energy Factor (UEF)uniform_energy_factor_uefnumberUniform Energy Factor (UEF) is the newest measure of water heater overall efficiency. It is a metric used to compare the relative efficiencies of water heaters. The higher the UEF is, the more efficient the water heater.
Therms Per Year at 125°F outlet temptherms_year_at_125_f_outlet_temp_for_natural_gasnumberTherms/year refers to the amount of natural gas consumed by the water heater with a tested outlet temperature of 125°F per the UEF test method.
Gallons/year at 125°F outlet temp for Propanegallons_year_at_125_f_outlet_temp_for_propanenumberGallons/year refers to the amount of propane consumed by the water heater with a tested outlet temperature of 125°F per the UEF test method.
First Hour Rating at 125°F outlet temp (gallons/hr)first_hour_rating_at_125_f_outlet_temp_gallons_hrnumberFirst Hour Rating is the amount of hot water (in gallons) a storage water heater can supply per hour (starting with a tank full of hot water) per the UEF test method.
Maximum Gallons Per Minute over 67°F risemaximum_gallons_per_minute_over_67_f_risenumberThe amount of hot water, in gallons, a tankless water heater can supply per minute over a 67°F rise per the UEF test method. This value is calculated for products that do not display UEF data.
Minimum Gallons Per Minute over 67°F riseminimum_gallons_per_minute_over_67_f_risenumberThe amount of hot water, in gallons, a tankless water heater can supply per minute over a 67°F rise per the UEF test method.
Recovery Efficiency per UEF test method (%)recovery_efficiency_per_uef_test_methodtextRecovery efficiency refers to how efficiently the heat from the burner is transferred to the water in the tank per the UEF test method.
Solar System Typesolar_system_typetextForced Circulation systems use a pump to circulate the water or other fluid from the collector where it is heated by the sun to the storage tank. Integral Collector Storage (ICS) systems, or “batch” water heaters, combine the collector and the storage tank into one. Thermosyphon systems have a separate storage tank, located above the collector. Liquid (which could be water or an antifreeze solution) warmed in the collector rises to the storage tank.
Solar Collector Typesolar_collector_typetextSolar Water Heaters are available in the following collector types: batch, flat-plate, and evacuated tube. Batch collectors heat water in dark tanks or tubes within an insulated box, storing the water until drawn. Flat-plate collectors consist of copper tubes fitted to flat absorber plates. Evacuated tubes contain a vacuum of space around the metal or glass tube.
Solar Collector Panel Area (sq feet)solar_collector_panel_area_sq_feettextRefers to the total area consumed by the solar collector.
Solar Energy Factor (SEF)solar_energy_factor_seftextSolar Energy Factor refers to the energy delivered by the total system divided by the electrical or gas energy put into the system. The higher the SEF, the greater the solar contribution to water heating, which reduces the energy required by the backup water heater. The SEF is presented as a number similar to the Energy Factor (EF) given to conventional water heaters by the DOE test procedure.
Freeze Tolerance Limit (F)freeze_tolerance_limit_fnumberThe limit to the system’s tolerance of freezing weather conditions.
Solar Tank Volume (gallons)solar_tank_volume_gallonsnumberCapacity of the tank, in gallons.
Solar Type of Backupsolar_type_of_backuptextThis field is used to indicate whether the backup to the solar system is a tank or is tankless.
Solar Auxiliary Tank Volume (gallons)solar_auxiliary_tank_volume_gallonstextVolume is the capacity of the tank in a solar system, in gallons.
Solar Auxiliary Tank Input (kW)solar_auxiliary_tank_input_kwnumberElectric Input kW refers to the input wattage of the heat pump or supplementary electric elements.
Solar Auxiliary Tank Input (BTU/hr)solar_auxiliary_tank_input_thousand_btu_per_hourtextAuxiliary Input refers to the input BTU per hour rating of the backup gas water heater in the solar system, in thousand BTU per hour.
Water Heater Depth (inches)water_heater_depth_inchesnumberThe water heater's depth, in inches.
Water Heater Height (inches)water_heater_height_inchesnumberThe water heater's height, in inches.
Water Heater Width (inches)water_heater_width_inchesnumberThe water heater's width, in inches.
Date Available On Marketdate_available_on_marketcalendar_dateThe date that the model is available for purchase.
Date Certifieddate_qualifiedcalendar_dateThe date on which the product was confirmed to meet the ENERGY STAR specification.
MarketsmarketstextIncludes products sold in the U.S. and/or Canada and other ENERGY STAR partner countries.
CB Model Identifierenergy_star_model_identifiertextA unique string of characters assigned by certification bodies (CBs) to identify a model or set of models with the same performance characteristics. This identifier should remain the same for a model even if it is recertified to a new version of an ENERGY STAR specification. This string of characters is determined by CBs and is not the ENERGY STAR Unique ID assigned by EPA.