Solar thermal collectors are products that are specifically designed to capture solar energy and convert it, with a broader solar system, to useful heat for water or space heating applications. They are built around a solar absorber that uses radiation to increase the temperature of heating fluid flowing through the collector. This heat is then transferred to a storage vessel by means of a circulating fluid, or in some instances, the solar collector could be directly connected into the heating circuit.
Read the criteria for ETL inclusion here.
Find the application checklist here.
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Technology categories at a glance (20)
View all technology categoriesBoiler equipment
A wide variety of boiler equipment is listed on the ETL including hot water boilers, biomass boilers and steam boiler equipment.
Boiler retrofit equipment
A wide variety of boiler retrofit equipment is listed on the ETL including burners with controls, condensing economisers and non-condensing economisers.
Combined heat and power (CHP)
CHP is the simultaneous generation of heat and power. CHP schemes are bespoke by their nature.
Compressed air equipment
Compressed air equipment on the ETL includes master controllers, refrigerated air dryers, desiccant air dryers and flow controllers.
Energy monitoring
Equipment includes portable energy monitoring equipment and automatic monitoring & targeting sub-metering systems.
Energy storage
The energy storage category on the ETL includes battery and thermal energy storage for commercial and industrial applications.
Hand dryers
Two types of electric hands dryers are covered: high speed warm air dryers and high speed ambient air dryers. Conventional warm air dryers are not covered.
Heat pumps
Heat pumps eligible for ETL are air source heat pumps, water source heat pumps, ground source heat pumps and heat pump dehumidifiers.
Heat recovery ventilation units
This category features plate heat exchangers and rotating heat exchangers.
Heating, ventilation and air-conditioning (HVAC) equipment
Equipment such as HVAC building controls, active chilled beams, close control air conditioning and evaporative air coolers are listed.
Lighting
This includes white LED lighting modules for backlit illuminated signs, efficient white lighting units and building lighting controls.
Motors, drives & fans
Motors and drives available on the ETL are line operated motors, variable speed drives and converter-fed motors.
Pipework, tank & vessel insulation
Pipework, tank & vessel insulation reduces the flow of heat in and out of pipes, tanks or vessels.
Professional foodservice equipment (PFSE)
This category includes combination steam ovens, convection ovens, undercounter dishwashers and hood-type dishwashers.
Radiant and warm air heaters
Warm air heating, designed to provide space heating, and radiant heating, designed to heat people or objects, are both listed on the ETL.
Refrigeration equipment
A variety of products in both industrial and commercial refrigeration categories are listed on the ETL.
Solar thermal collectors
Solar thermal collectors eligible for the ETL are glazed flat plate solar collector and evacuated tube solar collectors.
Uninterruptible power supply (UPS)
UPS products on the ETL include: static UPS, rotary UPS and hybrid rotary UPS.
Waste heat to electricity conversion equipment
Processes that use energy and produce heat as a byproduct can utilise this to convert into energy.
Wastewater heat recovery systems
This category covers technology designed to use residual heat from drained wastewater via an instantaneous heat exchange to pre-heat incoming mains water.
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