If you click on the (i) symbol on the product details page, a little info box comes up saying:
"<!-- [if gte mso 9]><xml>
<w:WordDocument>
<w:View>Normal</w:View>
<w:Zoom>0</w:Zoom>
<w:HyphenationZone>21</w:HyphenationZone>
<w
oNotOptimizeForBrowser/>
</w:WordDocument>
</xml><![endif]--><span lang="EN-GB" style="font-size: 12pt; font-family: 'Times New Roman';">The estimated annual energy use is based on the Combined Energy Factor and an annual usage of 283 cycles per year, as referenced by the U.S. Department of Energy test procedure, Code of Federal Regulations, Title 10, Section 430, Subpart B, Appendix D2. Actual energy consumption will vary on your usage patterns, including how often your run the dryer, what cycle you select, and load size. NOTE: For gas dryers the estimated annual energy use is expressed in kilowatt hours to allow for comparison, and represents the equivalent multi-source energy use of the product (e.g., natural gas or propane typically expressed in British thermal units (Btu)).</span>"
Also found the test procedure here:
"<!-- [if gte mso 9]><xml>
<w:WordDocument>
<w:View>Normal</w:View>
<w:Zoom>0</w:Zoom>
<w:HyphenationZone>21</w:HyphenationZone>
<w

</w:WordDocument>
</xml><![endif]--><span lang="EN-GB" style="font-size: 12pt; font-family: 'Times New Roman';">The estimated annual energy use is based on the Combined Energy Factor and an annual usage of 283 cycles per year, as referenced by the U.S. Department of Energy test procedure, Code of Federal Regulations, Title 10, Section 430, Subpart B, Appendix D2. Actual energy consumption will vary on your usage patterns, including how often your run the dryer, what cycle you select, and load size. NOTE: For gas dryers the estimated annual energy use is expressed in kilowatt hours to allow for comparison, and represents the equivalent multi-source energy use of the product (e.g., natural gas or propane typically expressed in British thermal units (Btu)).</span>"
Also found the test procedure here: