Qualifying Criteria for
Version 2.0 – April 2011
A product shall meet all of the identified criteria if it is to earn the ENERGY STAR symbol.
- Commercial Open, Deep-Fat Fryer
An appliance, including a cooking vessel, in which oil is placed to such a depth that the cooking food is essentially supported by displacement of the cooking fluid rather than by the bottom of the vessel. Heat is delivered to the cooking fluid by means of an immersed electric element or band-wrapped vessel (electric fryers), or by heat transfer from gas burners through either the walls of the fryer or through tubes passing through the cooking fluid (gas fryers).
- Standard Fryer: A fryer with a vat that measures > 30.48 cm (12 inches) and < 45.72 cm (18 inches wide), and a shortening capacity ≥ 11.35 kg (25 pounds) and < 29.48 kg (65 pounds).
- Large Vat Fryer: A fryer with a vat that measures ≥ 45.72 cm (18 inches) and ≤ 60.96 cm (24 inches) wide, and a shortening capacity > 22.68 kg (50 pounds).
- Split Vat Fryer: A standard or large vat fryer with an internal wall that separates the vat into two equal sides.
- Cooking Energy Efficiency
The quantity of energy input to the food product (e.g., french fries) during the cooking process; expressed as a percentage of the quantity of energy input to the fryer during the heavy-, medium-, and light-load tests. For purposes of this specification, the heavy-load test as defined in ASTM F1361-07 and ASTM F2144-07 will be used as a measurement of cooking energy efficiency.
- Idle Energy Rate
The average rate of energy consumed [Btu/h (kJ/h) or kW] by the fryer while “holding” or “idling the frying medium at the thermostat(s) set point
- Product Family
Variations of one model are offered within a single product line with differences in aesthetics only. Individual models represented by a product family must be based on the same basic engineering design and have the same cooking energy efficiency and idle energy rate. All members of the family must also have the same fry pot size.
- Included Products
Products that meet the definition of a Commercial Open Deep-Fat Fryer as specified herein are eligible for ENERGY STAR qualification, with the exception of products listed in Section 2.B. Countertop and floor type designs are eligible to qualify for ENERGY STAR.
- Excluded Products
Fryers with vats measuring < 30.48 cm (12 inches wide), or > 60.96 cm (24 inches) wide, are not eligible for ENERGY STAR qualification.
3) Qualification Criteria
- Determining Fry Pot Size
The frying area shall be measured at the fryer’s maximum fill-line. The frypot width is considered to be the distance between the inner side walls of the frypot. The dimensions for split vat fryers shall be considered to be twice the width of one side. For kettle fryers, the frying area shall be measured at the fryer’s maximum fill-line using the diameter of the cylinder and determined by the inner walls.
- Cooking Energy Efficiency and Idle Energy Rate Requirements – Standard Fryers:
Table 1: Energy Efficiency Requirements for Standard Open Deep-Fat Gas Fryers Heavy-Load Cooking Energy Efficiency ≥ 50% Idle Energy Rate ≤ 9,000 Btu/hr Table 2: Energy Efficiency Requirements for Standard Open Deep-Fat Electric Fryers Heavy-Load Cooking Energy Efficiency ≥ 80% Idle Energy Rate ≤ 1,000 watts
- Cooking Energy Efficiency and Idle Energy Rate Requirements – Large Vat Fryers
Table 3: Energy Efficiency Requirements for Large Vat Open Deep-Fat Gas Fryers Heavy-Load Cooking Energy Efficiency ≥ 50% Idle Energy Rate ≤ 12,000 Btu/hr Table 4: Energy Efficiency Requirements for Large Vat Open Deep-Fat Electric Fryers Heavy-Load Cooking Energy Efficiency ≥ 80% Idle Energy Rate ≤ 1,100 watts
Note: Split-vat cooking energy efficiency and idle rate performance shall be measured with both sides operating.
- Significant Digits and Rounding
- All calculations shall be carried out with directly measured (unrounded) values.
- Unless otherwise specified, compliance with specification limit shall be evaluated using exact values without any benefit from rounding.
- Directly measured or calculated values that are submitted for reporting on the ENERGY STAR website shall be rounded to the nearest significant digit as expressed in the corresponding specification limit.
4) Test Criteria
- Representative Models shall be selected for testing per the following requirements:
- For qualification of an individual product model, the representative model shall be equivalent to that which is intended to be marketed and labelled as ENERGY STAR.
- For qualification of a product family, any model within that product family can be tested and serve as the representative model.
- When testing commercial fryers, the following test methods shall be used to determine ENERGY STAR qualification:
Table 5: Test Methods for ENERGY STAR Qualification ENERGY STAR Requirement Test Method Reference Cooking Energy Efficiency ASTM Standard F1361-07, Test Method for the Performance of Open Deep Fat Fryers (standard fryers)
ASTM Standard F2144-09, Test Method for Performance of Large Open Vat Fryers (large vat fryers)
Idle Energy Rate
5) Effective Date
The ENERGY STAR Commercial Fryer specification shall take effect on April 22, 2011. To qualify for ENERGY STAR, a product model shall meet the ENERGY STAR specification in effect on the model’s date of manufacture. The date of manufacture is specific to each unit and is the date (e.g., month and year) on which a unit is considered to be completely assembled.
6) Future Specification Revisions
ENERGY STAR reserves the right to change the specification should technological and/or market changes affect its usefulness to consumers, industry, or the environment. In keeping with current policy, revisions to the specification are arrived at through industry discussions. In the event of a specification revision, please note that ENERGY STAR qualification is not automatically granted for the life of the product model.