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Department for Business, Energy and Industrial Strategy

Curtains, Blinds, Doors and Covers for Refrigerated Display Cabinets

1.1    Scope

Curtains, blinds, doors and covers are barriers that can be used to reduce the infiltration of ambient air (and heat flow) into refrigerated display cabinets, thereby reducing the energy consumption of the cabinet.

The Energy Technology List (ETL) Scheme covers six categories of products:

  1. Strip curtains that consist of transparent, flexible strips hung adjacent to each other, and fastened at both ends to neighbouring strips, in a manner that allows temporary openings to be made in the curtain for the purpose of removing items from the cabinet.
  2. Blinds that consist of a flexible fabric mounted on a roller mechanism that enables the blind to be deployed across the display window of the cabinet when the retail outlet is closed or during trading. The blind may also incorporate a motorised control system.
  3. Transparent chest freezer covers (or ‘bubble lids’) that consist of a rigid transparent material that fits across the display window of the cabinet, and incorporates access holes that enable items to be removed from the cabinet without removing the cover.
  4. Transparent sliding doors that consist of doors with a heat reflective coating, mounted in a mechanism (that is designed to be installed in the window of the cabinet) that enables the doors to be opened when items need to be removed from the cabinet.
  5. Transparent hinged doors that consist of doors with a heat reflective coating, mounted in a mechanism (that is designed to be installed in the window of the cabinet) that enables the doors to be opened when items need to be removed from the cabinet.
  6. Enhanced air flow management equipment designed to enhance the descending air curtain at the front of an open refrigerated display cabinet in order to reduce the infiltration of ambient air. This equipment comprises modifications or attachments to the shelves of the cabinet.

To be eligible for inclusion on the ETL, products must meet the requirements as set out below.

1.2    Definitions

Curtains, blinds, doors and covers (for refrigerated display cabinets) are products that are specifically designed to reduce the infiltration of ambient air into a refrigerated display cabinet. 

1.3    Requirements 

1.3.1    Eligibility requirements  

To be eligible, products must:

  • Be of fixed design and dimensions with a unique product code. 

In addition, products in categories 1, 2, 3, 4 and 5 must:

  • Provide a flexible or rigid barrier that can be used to reduce the infiltration of ambient air (and heat flow) through the open display window of a refrigerated display cabinet.
  • Be designed to fit one or more specific types or models of refrigerated display cabinet in a manner that ensures that when fitted there is no air gap around the edges of the product’s rigid barriers, and an air gap of less than 20mm around the edges of the product’s flexible barriers.

Products in category 6 must:

  • Be a physical device designed to modify or be permanently attached to the shelving of one or more specific types or models of refrigerated display cabinet.
  • Be designed to guide the air flow(s) more closely down the entire front of a refrigerated display cabinet in order to reduce the infiltration of ambient air.

Equipment that contains integrated lighting equipment is eligible as long as the lighting equipment also meets the relevant ETL criteria for high efficiency lighting units or white light emitting diode lighting units as appropriate. 

1.4    Verification for ETL Listing 

There are no testing requirements, however manufacturers shall provide sales and technical brochures to evidence the conformity of their products against the requirements from section 1.3.  

1.5    Conformity testing

Products listed on the ETL may be subject to the scheme’s conformity testing programme in order to ensure listed models continue to meet the ETL requirements.