We hereby consent to the use in the Prospectus constituting a part of this Registration Statement of our report dated April 6, 2011, relating to the financial statements of ClearSign Combustion Corporation as of December 31, 2010 and 2009, and the related statement of operations, stockholders’ deficit, and cash flows for each of the years ended December 31, 2010 and 2009, and for the period from inception (January 23, 2008) through December 31, 2010, which is contained in that Prospectus. Our report contains an explanatory paragraph regarding the Company's ability to continue as a going concern.